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Obzory poluchili special'nyi diplom na konkurse RSCI


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Novosti nedeli

  • Novaya staraya inflyaciya

  • 11.09.2003. Obrazovanie dzhetov pri kollapse zvezd
    10.09.2003. Gaz za udarnym frontom vokrug Vol'f-Raie tumannosti NGC 2359
    06.09.2003. Obrazovanie massivnyh zvezd v solnechnoi okrestnosti

  • 05.09.2003. Peremennoe IK izluchenie ot sverhmassivnoi chernoi dyry v centre Mlechnogo Puti
  • 04.09.2003. Gravitacionnye linzy po dannym proekta GOODS
  • 31.08.2003. Gde nahoditsya poslednyaya ustoichivaya krugovaya orbita v sverhkriticheskih akkrecionnyh potokah?

    Soderzhanie i bystryi perehod k razdelam obzora


    Stat'i nedeli
    "Luchshie iz luchshih"

  • astro-ph/0309075
    Struktura galo po dannym o peremennyh tipa RR Lyr iz Sloanovskogo obzora

  • astro-ph/0309076
    Peremennoe IK izluchenie ot sverhmassivnoi chernoi dyry v centre Mlechnogo Puti

  • astro-ph/0309112
    Cvetovaya peremennost' asteroidov po dannym kataloga dvizhushihsya istochnikov SDSS

  • hep-th/0309095
    >Novaya staraya inflyaciya

  • astro-ph/0309321
    Model' diska pri vozvratnoi akkrecii dlya ul'tramoshnyh istochnikov

  • astro-ph/0309322
    Sistemy zvezdnyh velichin v staryh katalogah zvezd


    Goryachie temy nedeli

  • GOODS

    Otdel'nye stat'i

  • Novye parallaksy dlya 424 slabyh zvezd Gipparkosa

  • Sostyazanie po sozdaniyu sverhmassivnyh chernyh dyr

  • Sverhnovaya Tiho Brage: svet iz proshlyh vekov

  • Proverka prisutstviya odinochnoi ili dvoinoi chernoi dyry v sharovom skoplenii NGC 6752 po dinamike pul'sarov

  • Kosmofizika: rubezh vysokih energii

  • Spektry zhestkogo izlucheniya ot kandidatov v chernye dyry

  • Statisticheskaya interpretaciya sobytii mikrolinzirovaniya na BMO

  • Struktura galo po dannym o peremennyh tipa RR Lyr iz Sloanovskogo obzora

  • Peremennoe IK izluchenie ot sverhmassivnoi chernoi dyry v centre Mlechnogo Puti

  • Vybros sverhbystryh zvezd (dvoinymi) chernymi dyrami iz centra Galaktiki

  • Zhestkie istochniki do INTERGAL'a - opornyi katalog INTERGAL'a

  • Cvetovaya peremennost' asteroidov po dannym kataloga dvizhushihsya istochnikov SDSS

  • Istoriya astrofiziki v Antarktike

  • Gelievyi belyi karlik, obrashayushiisya vokrug millisekundnogo pul'sara v galo sharovogo skopleniya NGC 6752

  • Fundamental'naya fizika v kosmose: kvantovo-gravitacionnaya perspektiva

  • Kosmologicheskie parametry

  • Himicheskaya evolyuciya izotopov Mg ili variacii postoyannoi tonkoi struktury?

  • Novye ogranicheniya na peremennost' postoyannoi tonkoi struktury alpha

  • Svet, otrazhennyi ot blizkih vnesolnechnyh planet: v svete ih obnaruzheniya so sputnika MOST

  • Vysokotochnoe izmerenie skorostei zvezd v galakticheskom centre

  • Katalog pul'sarov ATNF

  • Novaya staraya inflyaciya

  • Formy planetarnyh tumannostei i svyazannyh s nimi ob'ektov

  • Krupnomasshtabnye obzory i kosmicheskie struktury

  • Procedury, resursy i izbrannye rezul'taty Glubokogo Obzora Ekliptiki

  • Andromeda VIII - novyi prilivno-vozmushennyi sputnik M31

  • Prilivnye radiusy sharovyh skoplenii i massa Mlechnogo Puti

  • Shkala odnorodnosti Vselennoi po dannym WMAP

  • Model' diska pri vozvratnoi akkrecii dlya ul'tramoshnyh istochnikov

  • Sistemy zvezdnyh velichin v staryh katalogah zvezd

  • Razvitie Vselennoi i novaya kosmologiya

  • Effekt cvetnoi sverhprovodimosti na massu i radius kvarkovoi zvezdy


    Iz razdela physics

  • Istoricheskaya zametka


    Polnyi Arhiv predydushih vypuskov.

    Arhiv statei, voshedshih v vypuski s 01 iyulya 2002 g. po 31 marta 2003 g.

    Razdely arhiva (s aprelya 2003 g.):
    kosmologiya,
    neitrino,
    kosmicheskie luchi i gamma-astronomiya,
    galaktiki, AYaG, kvazary,
    nasha Galaktika,
    mezhzvezdnaya sreda,
    zvezdy,
    sverhnovye,
    ostatki sverhnovyh,
    chernye dyry,
    neitronnye zvezdy,
    linzirovanie,
    Solnce,
    ekzoplanety,
    Solnechnaya sistema,
    akkreciya,
    tesnye dvoinye sistemy,
    gamma-vspleski,
    gravitacionnye volny,
    mehanizmy izlucheniya,
    chislennoe modelirovanie,
    dinamika, mehanika
    metody obrabotki dannyh,
    MGD,
    metody nablyudenii,
    budushie nablyudatel'nye proekty,
    prochee.


    Poleznye astronomicheskie ssylki.
    Korotkoe esse ob elektronnyh preprintah.
    Obzornye stat'i v astro-ph s 2001 g.
  • Obzory preprintov astro-ph

    Vypusk N55
    astro-ph za 01 - 12 sentyabrya 2003 goda: izbrannye stat'i

    Goryachie temy nedeli


    GOODS

    GOODS: The Great Observatories Origins Deep Survey. Eto proekt, prizvannyi dat' naibolee glubokie nablyudeniya galaktik i ih yader v raznyh diapazonah. Krome togo, v sferu interesov proekta popadayut kosmologicheskie sverhnovye i vnegalakticheskii fon (da, dumayu, vse, chto vylezet na glubokih snimkah). Great Observatories - eto Kosmicheskii teleskop (optika), Chandra - rentgen, SIRTF (IK). (Napomnim, chto proekt "Velikie observatorii" vklyuchal v sebya i CGRO - Compton Gamma-Ray Observatory. No eto uzhe drugaya istoriya, t.k. uglovoe razreshenie priborov, rabotayushih na vysokih energiyah, neveliko.) Takzhe ispol'zuyutsya i vozmozhnosti krupnyh nazemnyh teleskopov (v pervuyu ochered' dlya spektroskopii). Horoshee opisanie proekta mozhno naiti zdes': astro-ph/0204213

    Primerno s konca 2002 g. v Arhive aktivno stali poyavlyat'sya pervye rezul'taty. I vot proizoshel nekotoryi vsplesk aktivnosti: astro-ph/0309071, astro-ph/0309070, astro-ph/0309068, astro-ph/0309067, astro-ph/0309060, astro-ph/0309049, astro-ph/0309039.

    O nekotoryh stat'yah rasskazyvaetsya nizhe. Po materialam raboty "Strong Gravitational Lens Candidates in the GOODS ACS Fields" napisana odna iz ANOK. Otdel'no otmetim takzhe rabotu The Great Observatories Origins Deep Survey: Initial Results From Optical and Near-Infrared Imaging, gde opisyvayutsya rezul'taty pervye IK i opticheskih nablyudenii, i govoritsya o planiruemyh nablyudeniyah na SIRTF (Space Infrared Telescope Facility).



    Referaty otdel'nyh statei


    astro-ph/0309001 Novye parallaksy dlya 424 slabyh zvezd Gipparkosa (New Hipparcos-based Parallaxes for 424 Dim Stars)
    Authors: Andrew Gould and Julio Chaname
    Comments: Submitted to ApJS, 20 pages

    Kosmicheskaya astrometricheskaya missiya Gipparkosa zakonchilas' uzhe neskol'ko let nazad, a ego katalogi prodolzhayut obrabatyvat'. V osnovnom eto kasaetsya zvezd, lezhashih na predele chuvstvitel'nosti priborov: libo ob'ektov s malymi parallaksami ili sobstvennymi dvizheniyami, libo slabyh zvezd. Vot eshe odno dobavlenie: dlya 424 slabyh zvezd s horoshei tochnost'yu (>3) opredeleny parallaksy. Dvadcat' iz etih zvezd - belye karliki, a 29 - slabee 14-i zvezdnoi velichiny (v osnovnom eto karliki spektral'nogo klassa M).


    astro-ph/0309008 Sostyazanie po sozdaniyu sverhmassivnyh chernyh dyr (The Race to Build Supermassive Black Holes)
    Authors: Craig Tyler, Brent Janus, Diego Santos-Noble
    Comments: 15 pages, submitted to ApJ

    Eto stat'ya, interesnaya , v pervuyu ochered', s pedagogicheskoi tochki zreniya. V nei posledovatel'no i ponyatno opisany vozmozhnye scenarii obrazovaniya sverhmassivnyh chernyh dyr.

    V nachale nuzhno sozdat' "zarodysh". Eto mozhet byt' pervichnaya chernaya dyra: oni mogut byt' dovol'no massivnymi. Mozhet byt' produkt zhizni massivnoi zvezdy pokoleniya III - eto samye pervye (chisto vodorodno-gelievye) zvezdy. Mozhet byt' rezul'tat kollapsa sverhzvezdy. Mozhet byt' skollapsirovavshee skoplenie zvezd.

    Zatem nuzhno narashivat' massu. Vot tut - problemy. Seichas vidyat kvazar na z=6.41. Eto sootvetstvuet vozrastu Vselennoi menee 1 milliarda let (v ramkah naibolee populyarnoi modeli - 880 millionov let). A massa chernoi dyry v nem ocenivaetsya v 3 milliarda mass Solnca.

    Dlya narashivaniya massy est' dva s polovinoi sposoba: sliyaniya chernyh dyr (vo vremya sliyaniya galo temnoi materii), akkreciya obychnogo veshestva, akkreciya temnogo (nebarionnogo) veshestva. Avtory issleduyut v ramkah neslozhnyh modelei vse tri sposoba. I okazyvaetsya, chto sozdat' k z=6.41 dyru s massoi 3 milliarda mass Solnca ochen' i ochen' neprosto. Po suti tol'ko akkreciya obychnogo veshestva s tempom, ravnym kriticheskomu (eddingtonovskomu) mozhet pozvolit' narastit' chernuyu dyru za nuzhnoe vremya do nuzhnoi massy. Avtory predpolagayut, chto mozhet potrebovat'sya chto-to nevpolne standartnoe. Rech' ne idet ob ochen' bol'shoi ekzotike, no tem ne menee....


    astro-ph/0309009 Sverhnovaya Tiho Brage: svet iz proshlyh vekov (Tycho Brahe's supernova: light from centuries past)
    Authors: Pilar Ruiz-Lapuente
    Comments: 28 pages, 3 figures, 3 tables. submitted to ApJ (Main Journal)

    Sobrav i pereobrabotav istoricheskie svedeniya o nablyudenii Sverhnovoi Tiho (SN 1572) v 1572-74 gg., avtor (na osnove tol'ko etih dannyh) stroit ee krivuyu bleska i prihodit k zaklyucheniyu, chto eto byla sverhnovaya tipa Ia, i dazhe poluchaet ocenku ee absolyutnoi svetimosti

    MV=-19.58 -5 log (D/3.5 kpk) +/- 0.42.

    Krivaya bleska sverhnovoi Tiho (SN 1572) po vizual'nym ocenkam, ee sravnenie so sverhnovymi SN 1996x i SN 1991bg (v fil'tre V) i s teoreticheskimi krivymi sverhnovyh tipa Ia.

    [Prim.: Esli uchest', chto sverhnovaya, porodivshaya Krabovidnuyu tumannost', byla otnesena k tipu II (a eto na mnogo let opredelilo ves' dal'neishii hod razvitiya teorii sverhnovyh) po fraze ih kitaiskih letopisei "... zvezda byla kak cinovka ...", to na lico yavnyi progress v izuchenii istoricheskih sverhnovyh.]

    Sverhnovoi Tiho posvyashena takzhe stat'ya astro-ph/0309013. V nei izuchayutsya teoreticheskie modeli ee vzryva (sravnenie odno- i trehmernyh raschetov).


    astro-ph/0309017 Proverka prisutstviya odinochnoi ili dvoinoi chernoi dyry v sharovom skoplenii NGC 6752 po dinamike pul'sarov (Probing the presence of a single or binary black hole in the globular cluster NGC 6752 with pulsar dynamics)
    Authors: Monica Colpi, Michela Mapelli, Andrea Possenti
    Comments: 13 pages, 8 figures, accepted in ApJ

    Esli vy schitaete, chto period radiopul'sara mozhet tol'ko uvelichivat'sya, to vy ne sovsem pravy. Obychno proishodit imenno tak, no esli pul'sar nahoditsya nedaleko ot dostatochno massivnogo tela (plotnogo zvezdnogo skopleniya ili chernoi dyry promezhutochnoi massy) i vektor ego uskoreniya napravlen na nas, to nablyudaemyi s Zemli period mozhet i umen'shat'sya (real'no zhe period vse-taki rastet).

    Pyat' podobnyh pul'sarov (s neubyvayushimi ili ukorachivayushimisya periodami) obnaruzheny v sharovom skoplenii NGC 6752. Prichem, esli dvoinoi pul'sar PSR-A raspolozhen v galo skopleniya, to pul'sary PSR-B i PSR-E nahodyatsya vblizi ego centra. Tyagoteniya samogo skopleniya, po-vidimomu, ne dostatochno dlya ob'yasneniya nablyudaemyh yavlenii. Stalo byt' neobhodimo dobavit' v centr skopleniya dostatochno massivnuyu odinochnuyu chernuyu dyru ili bolee legkuyu dvoinuyu.


    obzor! astro-ph/0309027 Kosmofizika: rubezh vysokih energii (Cosmic Physics: The High Energy Frontier)
    Authors: F.W. Stecker
    Comments: Topical Review Paper to be published in the Journal of Physics G, 50 pages

    Bol'shoi, horoshii, dostupnyi obzor po kosmicheskim lucham s nekotorym uporom na neitrino vysokih energii. Mnogo (20) horoshih kartinok. V osnovnom grafiki, kotorye horosho proyasnyayut sut' dela.


    miniobzor astro-ph/0309028 Spektry zhestkogo izlucheniya ot kandidatov v chernye dyry (High-Energy Spectra from Black-Hole Candidates)
    Authors: Tomaso Belloni (Brera Astronomical Observatory, Merate, Italy)
    Comments: 9 pages, 11 figures, invited paper at the symposium: The Restless High-Energy Universe, Amsterdam, May 2003

    Blagodarya uspeshnoi rabote kosmicheskih observatoriya BeppoSAX i RossiXTE za neskol'ko let nashi znaniya o predmete stat'i vozrosli v neskol'ko raz. Zdes' vy naidete opisanie spektrov kandidatov v chernye dyry, paradigmu "razlichnyh sostoyanii chernyh dyr" i opisanie ih modelirovaniya.

    Neskol'ko razlichnyh spektrov kandidatov v chernye dyry.


    astro-ph/0309051 Statisticheskaya interpretaciya sobytii mikrolinzirovaniya na BMO (Statistical Interpretation of LMC Microlensing Candidates)
    Authors: Sohrab Rahvar
    Comments: 13 pages, 4 figures

    Posle desyati let nablyudenii sobytii gravitacionnogo mikrolinzirovaniya my imeem neskol'ko desyatkov takih sobytii v napravlenii na Bol'shoe Magellanovo Oblako. Eto rezul'taty eksperimentov EROS i MACHO. Rezul'taty obrabotki etoi statisticheski znachimoi vyborki govoryat, chto razbros dlitel'nostei sobytii gorazdo men'she, chem mozhno bylo ozhidat' soglasno modeli Mlechnogo Puti, prichem eto otklonenie dovol'no sushestvenno - po krainei mere 2. Togda otkuda oni vzyalis'? (Idei uzhe est', no oni trebuyut utochneniya i proverki.)


    astro-ph/0309075 Struktura galo po dannym o peremennyh tipa RR Lyr iz Sloanovskogo obzora (Halo Structure Traced by SDSS RR Lyrae)
    Authors: Z. Ivezic et al.
    Comments: 4 pages, 2 color figures, uses newpasp.sty, `Satellites and Tidal Streams, May 26-30, 2003, La Palma, Canary Island, Spain'', in press

    Po dannym raboty Sloanovskogo cifrovogo obzora neba (SDSS) vydeleno bolee 3000 zvezd-kandidatov v peremennye tipa RR Liry. Oni pozvolyayut propisat' strukturu nashei Galaktiki vplot' do rasstoyanii poryadka 100 kpk ot centra. Avtory obsuzhdayut otkryvayushiesya perspektivy (osobo upomyanem vozmozhnoe proyasnenie struktury prilivnogo potoka ot karlikovoi galaktiki v Strel'ce - Sgr dwarf tidal stream).

    Sm. takzhe rabotu teh avtorov "Reaching to the Edge of the Milky Way Halo with SDSS".


    astro-ph/0309076 Peremennoe IK izluchenie ot sverhmassivnoi chernoi dyry v centre Mlechnogo Puti (Variable Infrared Emission from the Supermassive Black Hole at the Center of the Milky Way)
    Authors: A. M. Ghez et al.
    Comments: submitted to Astrophysical Journal Letters

    Otkryto slaboe peremennoe infrakrasnoe izluchenie ot sverhmassivnoi chernoi dyry v centre nashei Galaktiki! Eto stalo vozmozhnym blagodarya vozrosshemu uglovomu razresheniyu priborov i novym dannym o dvizhenii zvezd vokrug chernoi dyry. Ranee izluchenie pripisyvalos' odnoi iz etih zvezd, no seichas mozhno chetko govorit' o tom, chto ono ishodit iz oblasti razmerom ne bolee 5 a.e. (eto 80 shvarcshil'dovskih radiusov dlya 4 millionov mass Solnca). Avtory polagayut, chto eto izluchenie mozhet byt' svyazano s nablyudavshimisya rentgenovskimi vspyshkami. A imenno, te zhe elektrony, chto byli otvetstvenny za rentgenovskoe izluchenie, porozhdayut i nablyudaemoe infrakrasnoe.


    astro-ph/0309084 Vybros sverhbystryh zvezd (dvoinymi) chernymi dyrami iz centra Galaktiki (Ejection of hypervelocity stars by the (binary) black hole(s) in the Galactic center)
    Authors: Qingjuan Yu (CITA), Scott Tremaine (Princeton)
    Comments: 23 pages, including 2 figures; accepted for publication in ApJ

    Kakie processy vblizi centra Galaktiki mogli by pridavat' zvezdam skorosti vyshe 1000 km/s? Avtory ukazyvayut na tri vozmozhnosti:

    1. Blizkie prolety odinochnyh zvezd: uskorenie do takih skorostei proishodit ochen' redko, ~10-11 let-1.
    2. Razryv dvoinoi sistemy prilivnymi silami central'noi chernoi dyry (obychnyi mehanizm Hilla). Vysokie skorosti priobretayut tol'ko komponenty tesnyh sistem (a<0.3 a.e). Chastota sobytii mozhet dostigat' ~10-5 let-1, no ona zavisit ot doli tesnyh par v centre Galaktiki.
    3. Stolknovenie odinochnoi zvezdy s "dvoinoi" chernoi dyroi. Slovo dvoinoi vzyato v kavychki potomu, chto odnim iz komponentov pary schitaetsya Sgr A* - central'naya chernaya dyra Mlechnogo Puti. Pri udachnom prostranstvennom raspredelenii chernyh dyr vblizi centra Galaktiki chastota sobytii v etom kanale mozhet dostigat' 10-4 let-1.

    Mozhno ozhidat', chto podobnye sverhbystrye zvezdy budut obnaruzheny v sleduyushem pokolenii krupnomasshtabnyh obzorov galakticheskogo centra.


    astro-ph/0309101 Zhestkie istochniki do INTERGAL'a - opornyi katalog INTERGAL'a (High-Energy sources before INTEGRAL - INTEGRAL reference catalog)
    Authors: Ken Ebisawa et al.
    Comments: Accepted to A&A Letter INTEGRAL special issue

    Dlya lyubogo obzora neba nuzhny opornye istochniki - ob'ekty togo zhe tipa, chto budut izuchat'sya v obzore, no s uzhe (zaranee) izvestnymi svoistvami i koordinatami. Eto opornyi katalog obzora.

    Kakie ob'ekty sostavlyayut opornyi katalog INTERGAL'a? Eto izvestnye ranee rentgenovskie i gamma istochniki s potokami poryadka 1 mCrab i yarche na energiyah vyshe 3 keV. Takih istochnikov v kataloge 1122. V kataloge privedeny koordinaty, potoki i spektral'nye svoistva istochnikov.


    astro-ph/0309112 Cvetovaya peremennost' asteroidov po dannym kataloga dvizhushihsya istochnikov SDSS (Color Variability of Asteroids in SDSS Moving Object Catalog)
    Authors: G. Szabo et al.
    Comments: 13 pages, 15 figures, submitted to MNRAS, full resolution figs available at http://www.astro.princeton.edu/~ivezic/SDSSReferences/astcolorvar.pdf

    SDSS snimal vse: chto dvizhetsya i ne dvizhetsya. Sredi dvizhushihsya ob'ektov nemalo asteroidov. Teh, kotorye nablyudalis' neskol'ko raz, nabralos' 7,531. SDSS poluchal izobrazheniya v neskol'kih (pyati) cvetah. Posle obrabotki dannyh okazalos', chto cveta mnogih asteroidov sushestvenno peremenny. Dlya raznyh asteroidov variacii raznye. Oni ne korreliruyut s razmerov, tipom i t.p. Po vsei vidimosti prichina kroetsya v neodnorodnoi otrazhatel'noi sposobnosti poverhnosti asteroidov.


    astro-ph/0309124 Istoriya astrofiziki v Antarktike - kratkii obzor (History of Astrophysics in Antarctica - A Brief Overview)
    Authors: B.T.Indermuehle et al.
    Comments: 1 page, 1 pdf-poster.

    Astronomiei v Antarktide zanimalis' pochti v techenie vsego XX veka. Avtory vydelyayut tri perioda i tri sootvetstvuyushih napravleniya issledovanii:

    1. Poisk meteoritov (s 1912 g.): v Antarktide (vdali ot poberezh'ya) lyuboi kamen' lezhashii na l'du (ili na nebol'shoi glubine podo l'dom) - meteorit.
    2. Astrofizika vysokih energii (s serediny 1950-h): v Antarktide poyavilis' detektory kosmicheskih luchei. Samyi grandioznyi proekt etogo napravleniya - ledovyi cherenkovskii detektor AMANDA.
    3. Mikrovolnovaya astronomiya (s serediny 1970-h): Antarktida iz-za svoei vysoty i suhosti vozduha okazalas' prekrasnym mestom dlya nazemnyh i ballonnyh eksperimentov po izucheniyu anizotropii reliktovogo fona.


    astro-ph/0309151 Gelievyi belyi karlik, obrashayushiisya vokrug millisekundnogo pul'sara v galo sharovogo skopleniya NGC 6752 (The Helium White Dwarf orbiting the Millisecond Pulsar in the halo of the Globular Cluster NGC 6752)
    Authors: F.R.Ferraro et al.
    Comments: 12 pages, 3 figures. ApJ Letters, (in press)

    Na glubokih snimkah, sdelannyh v neskol'kih fil'trah na teleskope VLT (ESO), udalos' naiti opticheskii ob'ekt, sootvetstvuyushii millisekundnomu pul'saru PSR J1911-5958A v galo sharovogo skopleniya NGC 6752. Eto golubaya zvezda, kotoraya na diagramme cvet-zvezdnaya velichina popadaet na posledovatel'nost' ostyvayushih malomassivnyh (M~0.17-0.20Mo) gelievyh belyh karlikov s nizkoi metallichnost'yu na rasstoyanii, sootvetstvuyushem sharovomu skopleniyu. Eto vtoroi dvoinoi millisekundnyi pul'sar s takim kompan'onom v etom skoplenii. Bol'shoe udalenie sistemy ot centra skopleniya (~6') ukazyvaet na to, chto sistema byla vybroshena iz yadra skopleniya v rezul'tate dinamicheskogo vzaimodeistviya (blizkogo proleta), prichem dostatochno nedavno (<1 mlrd. let). Vozrast belogo karlika po ego temperature lezhit v dostatochno uzkom diapazone (~1.2-2.8 mlrd. let), t.e. v moment "vybrosa" sistemy pul'sar byl uzhe "raskruchen" do millisekundnogo perioda.


    astro-ph/0309174 Fundamental'naya fizika v kosmose: kvantovo-gravitacionnaya perspektiva (Fundamental physics in space: a Quantum-Gravity perspective)
    Authors: Giovanni Amelino-Camelia
    Comments: 20 pages, LaTex. To appear in a special issue "Fundamental physics on the International Space Station and in space" of General Relativity and Gravitation

    Avtor rassmatrivaet, kak budushie kosmicheskie proekty (sputnik GLAST, proekty AMS i EUSO) smogut pomoch' prodvinut'sya v issledovaniyah kvantovoi gravitacii. Estestvenno, izlozhenie soprovozhdaetsya poyasneniyami po povodu proveryaemyh parametrov i ispol'zuemyh podhodov. Bolee togo, eti poyasneniya zanimayut osnovnoi ob'em raboty. Nekotorye otryvki dostatochno trudny dlya vospriyatiya, no chto delat'?


    obzor hep-ph/0309040 Kosmologicheskie parametry (The Cosmological Parameters)
    Authors: Ofer Lahav and Andrew R Liddle
    Comments: 23 pages LaTeX file with 4 figures. Article for Reviews of Particle Properties. Comments welcome, especially before copy deadline of mid September 2003 (but note article style is for minimal referencing). One figure included as separate JPEG due to size; alternatively download page-efficient 2up gzipped postscript file (550kb) with all figures at http://astronomy.susx.ac.uk/~andrewl/llrpp_2up.ps.gz

    My budem starat'sya bolee-menee postoyanno upominat' o podobnyh obzorah. Delo ne v tom, chto postoyanno poyavlyaetsya nechto principial'no novoe, i ne v tom chto dostatochno prosto v ocherednoi raz skazat': "poyavilsya novyi obzor, posvyashennyi sovremennoi kosmologicheskoi kartine". Prichin dve. Pervaya sostoit v neugasayushem interese k kosmologicheskoi tematike, a eto znachit, chto tem, kto ob etom pishet i rasskazyvaet (ne buduchi professional'nym kosmologom) ne meshaet "derzhat' ruku na pul'se" (ili, kak govorit "nash shef": "sledit' za rasshireniem Vselennoi"). Vtoraya prichina svyazana s tem, chto kazhdyi avtor nemnogo po-svoemu stroit rasskaz o vpolne standartnoi kartine. I etot obzor ne isklyuchenie.

    Vazhnoi osobennost'yu stat'i yavlyaetsya to, chto avtory hot' po chut'-chut', no govoryat o vseh (ili pochti vseh) "neponyatnyh slovah". Eto sushestvenno proyasnyaet smysl dlya neprofessionala. Krome togo, kratko obsuzhdaetsya, kak standartnaya kartina mozhet izmenyat'sya v budushem, kakie nablyudeniya smogut dat' novyi vklad.


    astro-ph/0309197 Himicheskaya evolyuciya izotopov Mg ili variacii postoyannoi tonkoi struktury? (The Chemical Evolution of Mg Isotopes vs. the Time Variation of the Fine Structure Constant)
    Authors: T.Ashenfelter et al.
    Comments: 4 pages, latex, 1 eps figure

    Esli postoyannaya tonkoi struktury na samom dele ne menyaetsya so vremenem, to otnoshenie dlin voln opredelennyh spektral'nyh linii, vhodyashih v mul'tiplety, ne budet zaviset' ot krasnogo smesheniya istochnika izlucheniya. Odnimi iz podobnyh linii yavlyayutsya nekotorye mul'tiplety izotopov magniya 24Mg, 25Mg i 26Mg. Nablyudeniya linii etih mul'tipletov ukazyvayut na izmenenie postoyannoi tonkoi struktury. Odnako, esli predpolozhit', chto izotopnyi sostav Mg na bol'shih krasnyh smesheniyah otlichalsya ot Solnechnogo (a imenno, chto tam bylo bol'she tyazhelyh izotopov 25Mg i 26Mg), to rezul'taty nablyudenii mozhno soglasovat' s neizmenyayusheisya postoyannoi tonkoi struktury. Izbytok bogatyh neitronami izotopov Mg mozhno ozhidat', kak rezul'tat sinteza etih elementov v konvektivnyh obolochkah bednyh metallami zvezd (zvezd pervyh pokolenii) na stadii gigantov asimptoticheskoi vetvi. Podobnoe raspredelenie izotopov nablyudaetsya u zvezd v sharovyh skopleniyah.


    astro-ph/0309205 Novye ogranicheniya na peremennost' postoyannoi tonkoi struktury alpha (New constraints on varying alpha)
    Authors: G.Rocha et al.
    Comments: 6 pages, 4 figures, 3 tables

    Eti rezul'taty osnovany na obrabotke dannyh WMAP po anizotropii reliktovogo fona i otnosyatsya k znacheniyu alpha na moment rekombinacii (z~1100). Vyvod avtorov: na tot moment postoyannaya tonkoi struktury otlichalas' ot svoego sovremennogo znacheniya ne bol'she, chem na 6% (znachimost' rezul'tata - 2).


    astro-ph/0309209 Svet, otrazhennyi ot blizkih vnesolnechnyh planet: v svete ih obnaruzheniya so sputnika MOST (Scattered Light from Close-in Extrasolar Planets: Prospects of Detection with the MOST Satellite)
    Authors: Daniel Green et al.
    Comments: Accepted to ApJ, 24 pages, 8 figures

    Zapusk sputnika dlya sverhtochnoi kosmicheskoi fotometrii MOST (Microvariability and Oscillations of STars) predostavit pervuyu vozmozhnost' dlya obnaruzheniya ekzoplanet s pomosh'yu registracii otrazhennogo imi sveta (u vseh ranee provodivshihsya eksperimentov byla dlya etogo nedostatochnaya tochnost').

    Avtory dannoi raboty proveli issledovanie togo, kakoi velichiny i formy signal ot planety mozhno ozhidat'. Modelirovanie velos' dlya zvezdy tau Boo, odnoi iz pervoocherednyh nablyudatel'nyh celei eksperimenta MOST.

    Otnoshenie potoka otrazhennogo planetoi s radiusom 1.3 radiusa Yupitera, raspolozhennoi na rasstoyanii 0.05 a.e. ot zvezdy tau Boo, k potoku izlucheniya samoi zvezdy. Punktirnaya liniya - pri otsutstvii oblachnogo pokrova, sploshnaya - pri nalichii oblakov. (Obratite vnimanie: otrazhennyi planetoi svetovoi potok sostavlyaet primerno 10-5-10-6 potoka zvezdy.)


    astro-ph/0309210 Vysokotochnoe izmerenie skorostei zvezd v galakticheskom centre (High Precision Stellar Radial Velocities in the Galactic Center)
    Authors: Donald F. Figer, et al.

    V rabote predstavleno vysokotochnoe izmerenie skorostei 85 holodnyh zvezd v central'nom parseke nashei Galaktiki. Tochnost' izmereniya skorostei okolo 1 km/s, chto v 30-100 raz vyshe, chem v predydushih izmereniyah! Povtorenie izmerenii cherez mesyac pokazalo, chto u zvezd nablyudavshihsya dva raza skorosti otlichalis' v srednem na 0.8 km/s.

    Raspredelenie skorostei imeet sleduyushii vid: eto gaussiana so srednim znacheniem <v>=-10.1+/-11.0 km/s (minus oznachaet napravlenie k nam) i dispersiei 100.9+/-7.7 km/s. V predelah 1 eto raspredelenie soglasuetsya s gipotezoi izotropnosti i sfericheskoi simmetrii.

    Karta i radial'nye skorosti zvezd. Razmer kruzhka oboznachaet velichinu skorosti. Pustye kruzhki - zvezdy dvizhushihsya ot Solnca, chernye - k Solncu.


    astro-ph/0309219 Katalog pul'sarov ATNF (The ATNF pulsar catalogue)
    Authors: G. Hobbs et al.
    Comments: 2 pages, To appear in "Young Neutron Stars and Their Environments" (IAU Symposium 218, ASP Conference Proceedings), eds F. Camilo and B. M. Gaensler

    Specialisty uzhe davno i aktivno pol'zuyutsya katalogom radiopul'sarov ATNF. Vot kratkoe ego opisanie.

    Seichas katalog soderzhit opisanie primerno 1300 neitronnyh zvezd. Dlya kazhdoi iz nih privedeno do 90 parametrov. Krome togo, privodyatsya podrobnye bibliograficheskie dannye. Takzhe est' special'naya "ekspertnaya moda", kotoraya daet mnogo potryasayushih vozmozhnostei raboty s katalogom.


    hep-th/0309095 Novaya staraya inflyaciya (New Old Inflation)
    Authors: Gia Dvali, Shamit Kachru
    Comments: 22 pages, LaTex

    Naibolee razrabotannye, prodvinutye i, vmeste s tem, standartnye scenarii sobytii v rannei Vselennoi vklyuchayut v sebya stadiyu inflyacii (po-vidimomu odnoi iz luchshih korotkih obzornyh statei yavlyaetsya eta, takzhe est' mnogo materialov i na russkom yazyke, blago sredi sozdatelei i razrabotchikov inflyacionnoi kosmologii rossiiskie uchenye zanimayut odno iz vedushih mest).

    Prakticheski srazu posle poyavleniya raboty Gusa (1981 g.) bylo pokazano, chto prosteishii variant inflyacii ne rabotaet. Togda byl razrabotan scenarii "novoi inflyacii" (sm., naprimer, podrobnoe opisanie v knige Andreya Linde). Potom, konechno, byli i novye idei (naprimer, t.n. "haoticheskaya inflyaciya"). I vot my vidim popytku reinkarnirovaniya scenariya staroi inflyacii.

    Vazhnoi prichinoi dlya podobnyh popytok yavlyaetsya neobhodimost' podgonki parametrov v novyh teoriyah inflyacii. V principe, v etom net nichego kriminal'nogo. Vo-pervyh, vazhno, chto teoriya rabotaet. Vo-vtoryh, mozhno vpolne zadeistvovat' antropnyi princip: voznikayut Vselennye s samymi raznymi naborami parametrov, no my mozhem poyavit'sya tol'ko v takoi. Tem ne menee, bylo by priyatno imet' teoriyu, izbavlennuyu ot etogo nedostatka. Dvali i Kachru polagayut, chto oni smogli eto sdelat'.

    Vperedi teoriyu zhdet dva ispytaniya. Samoe glavnoe, eto konechno zhe nablyudeniya. Avtory delayut dostatochno chetkie predskazaniya, kotorye v ne stol' uzh otdalennom budushem mozhno budet proverit'. No eshe ran'she nachnetsya aktivnaya diskussiya teoretikov. Fakticheski kazhdaya ser'eznaya popytka razrabotki novoi teorii rannei Vselennoi vstrechaet sil'neishuyu kritiku (nedavnim yarkim primerom yavlyaetsya razbor t.n. ekpiroticheskogo (ekpyrotic) scenariya, o chem takzhe mozhno prochest' zdes'). K sozhaleniyu, buduchi nespecialistom, sledit' za argumentaciei raznyh storon ochen' trudno ...


    obzor astro-ph/0309228 Formy planetarnyh tumannostei i svyazannyh s nimi ob'ektov (Shaping Planetary Nebulae and Related Objects)
    Authors: Noam Soker
    Comments: 27 pages

    Obzor posvyashen formam, kotorye priobretayut planetarnye tumannosti i kosmicheskie puzyri. V nem rassmotreny sleduyushie voprosy:

    • osnovnye tipy vzaimodeistviya s mezhzvezdnoi sredoi;
    • rol' magnitnogo polya;
    • obolochki na stadiyah posle AGB;
    • puzyri v planetarnyh tumannostyah i skopleniyah galaktik;
    • ob'ekty, podobnye planetarnym tumannostyam.


    obzor astro-ph/0309240 Krupnomasshtabnye obzory i kosmicheskie struktury (Large-scale surveys and cosmic structure)
    Authors: J.A. Peacock (University of Edinburgh)
    Comments: 61 pages. Lectures delivered at the 2002 Tenerife Winter School, "Dark matter and dark energy in the universe"

    Dannaya stat'ya - obzornaya lekciya, prochitannaya na odnoi iz zimnih shkol - posvyashena izucheniyu krupnomasshtabnoi struktury po obzoram galaktik (podobnyh obzoru 2dF). Vtoraya chast' etoi lekcii posvyashena sovremennym nablyudatel'nym kosmologicheskim testam.

    Odnovremenno opublikovana "umen'shennaya" versiya dannogo obzora "Krupnomasshtabnaya struktura i materiya vo Vselennoi" (astro-ph/0309238).


    astro-ph/0309251 Procedury, resursy i izbrannye rezul'taty Glubokogo Obzora Ekliptiki (Procedures, Resources, and Selected Results of the Deep Ecliptic Survey)
    Authors: M.W.Buie et al.
    Comments: 12 pages, 1 fig.

    Glubokii Obzora Ekliptiki (Deep Ecliptic Survey) - proekt, osnovnaya cel' kotorogo - obsledovat' bol'shuyu po ploshadi oblast' neba vdol' ekliptiki dlya poiska slabyh ob'ektov (do R~24m), kotorye mogut okazat'sya telami vneshnih chastei Solnechnoi sistemy. Obzor vedetsya s 1998 goda na chetyrehmetrovyh teleskopah observatorii Kitt Pik i S'erra Tololo s pomosh'yu mozaichnyh PZS kamer, razmeshaemyh v pryamom fokuse. K martu 2003 goda v hode dannogo obzora bylo otkryto 272 novyh ob'ekta.

    Bolee podrobnuyu informaciyu vy smozhete naiti na saite proekta
    http://www.lowell.edu/Research/DES/ i na ego ftp-servere.


    astro-ph/0309254 Andromeda VIII - novyi prilivno-vozmushennyi sputnik M31 (Andromeda VIII - a New Tidally Distorted Satellite of M31
    Authors: Heather Morrison et al.
    Comments: 11 pages, 2 figures. ApJ Letters, in press

    Otkryt novyi sputnik tumannosti Andromedy. Eto karlikovaya galaktika, nazvannaya Andromeda VIII, raspolozhena na nebe vblizi karlikovoi ellipticheskoi galaktiki M32. Novyi sputnik sil'no vozmushen prilivnymi silami so storony tumannosti Andromedy, ego dlina sostavlyaet okolo 10 kpk, shirina - neskol'ko kiloparsek, a svetimost' - 1.2-2.4x108 svetimostei Solnca. On soderzhit 5-12 planetarnyh tumannostei i 1-3 sharovyh skopleniya. V nei soderzhitsya primerno 4x105 Mo neitral'nogo vodoroda (HI) Luchevaya skorost' etoi galaktiki -204 km/s otnositel'no M31.

    Na mestopolozhenie galaktiki Andromeda VIII nalozhena fotografiya M31 (sdelannaya na shirokougol'nom shmidtovskom teleskope). Kruzhki oboznachayut polozheniya sharovyh skoplenii, kvadratiki - planetarnyh tumannostei, krupnye kresty - mesta obnaruzheniya HI. Na foto takzhe otmecheno polozhenie M32.


    astro-ph/0309312 Prilivnye radiusy sharovyh skoplenii i massa Mlechnogo Puti (Tidal radii of globular clusters and the mass of the Milky Way)
    Authors: Michele Bellazzini (INAF - Oss. Astron. di Bologna)
    Comments: LaTex. 6 pages, 2 figures. Accepted for publication by MNRAS

    Do sih por edinstvennym pryamym sposobom opredeleniya massy nashei Galaktiki bylo izmerenie skorostei krugovyh dvizhenii tel v ee udalennyh chastyah. Avtorom dannoi stat'i primenen drugoi sposob - cherez opredelenie prilivnyh radiusov (radiusov za kotorymi zvezdy "vyryvayutsya" iz skoplenii prilivnymi silami, deistvuyushimi so storony Mlechnogo Puti) dalekih (R>35 kpk) sharovyh skoplenii. Etot metod daet nezavisimuyu ocenku massy Galaktiki vnutri sfer s radiusami ot 35 do 100 kpk. Novyi rezul'tat horosho sovpadaet so starym (t.e. sootvetstvuet nablyudaemym na bol'shih rasstoyaniyah lineinym skorostyam krugovogo dvizheniya ravnym Vc=220+/-40 km/s. Naibolee tochnyi rezul'tat poluchen po sharovomu skopleniyu NGC 2419:

    MGal(R<90 kpk) = 1.4(+2.9/-1.0)x1012 Mo.


    astro-ph/0309320 Shkala odnorodnosti Vselennoi po dannym WMAP (Scale of Homogeneity of the Universe from WMAP)
    Authors: Patricia G. Castro et al.
    Comments: 3 pages, 1 figure. Submitted to Phys. Rev. D. Brief Report

    Dovol'no davno Grishuk i Zel'dovich napisali rabotu o tom, kak neodnorodnost' Vselennoi na masshtabah mnogo bol'shih razmerov ee nyneshnego gorizonta skazyvaetsya na anizotropii reliktovogo izlucheniya. Etot effekt svyazan s tem, chto po mere uvelicheniya razmera gorizonta (iz-za rasshireniya Vselennoi) v nego pronikayut vozmusheniya plotnosti s masshtabami, kotorye ran'she ne mogli nablyudat'sya i, takim obrazom, Vselennaya "nemnogo chuvstvuet" to, chto raspolozheno za ee predelami. Neodnorodnost' na sverhkrupnyh masshtabah skazyvaetsya na amplitude kvadrupolya (samoi nizshei garmoniki) reliktovogo mikrovolnovogo fona.

    Esli zhe teper' vzyat' spektr anizotropii relikta, postroennyi po nablyudeniyam WMAP, to mozhno poluchit' nizhnii predel masshtaba zagorizontnoi neodnorodnosti raspredeleniya veshestva vo Vselennoi. Eta ocenka okazyvaetsya v 3927 bol'shei razmerov nyneshnego gorizonta (pri urovne znachimosti ravnom 95%). [Prim.: Otmetim, chto amplitudy treh nainizshih garmonik anizotropii reliktovogo fona schitayutsya anomal'no nizkimi nastol'ko, chto dlya ob'yasneniya etih faktov pytayutsya privlekat' "novuyu fiziku". Iz-za etogo, vozmozhno, budut voznikat' problemy s neposredstvennym primeneniem rezul'tata Grishuka i Zel'dovicha.]


    astro-ph/0309321 Model' diska pri vozvratnoi akkrecii dlya ul'tramoshnyh istochnikov (A Fallback Disk Model for Ultraluminous X-ray Sources)
    Authors: Xiang-Dong Li
    Comments: 6 pages, accepted for publication in ApJL

    Napomnim, ul'tramoshnye istochniki (UMI) - eto ob'ekty, nablyudaemye obychno v rentgenovskom diapazone, potok izlucheniya ot kotoryh sotvetstvuet izotropnoi svetimosti bolee 1039 erg/s. Eta svetimost' sootvetstvuet akkrecii na chernuyu dyru s massoi 10 mass Solnca. Esli my vidim bOl'shii potok, to ili massa chernoi dyry bol'she (a otkuda ih vzyat'?), ili izluchenie ne izotropno - dzhet.

    Nablyudeniya ukazyvayut, chto ul'tramoshnye istochniki obychno nahodyatsya tam zhe, gde i molodye massivnye zvezdy (hotya vidyat istochniki i v ellipticheskih galaktikah). Nekotorye iz UMI sovpadayut s ostatkami sverhnovyh. Eto privelo avtora stat'i k mysli, chto istochnikom veshestva dlya akkrecii mozhet byt' tozhe samoe veshestvo, chto bylo vybrosheno pri vzryve sverhnovoi.

    Davno bylo pokazano, chto posle vzryva znachitel'naya chast' veshestva mozhet vypadat' obratno. Takoi process poluchil nazvanie vozvratnaya akkreciya (fall-back). Veshestvo mozhet obrazovyvat' disk, chto mozhet privodit' k anizotropii izlucheniya i obrazovaniyu dzhetov. No po vidimomu vpervye ideyu vozvratnoi akkrecii primenyayut dlya ob'yasneniya ul'tramoshnyh istochnikov (u menya eta rabota vyzvala reakciyu: "Pochemu zhe ya-to ne dogadalsya?!" - S.P.). Avtor ne pretenduet na ob'yasnenie vseh izvestnyh ob'ektov etogo tipa, t.k. stadiya vozvratnoi akkrecii so stol' vysokim energovydeleniem yavlyaetsya dostatochno korotkoi (okolo 100000 let). Odnako mozhno ob'yasnit' poryadka 10 procentov istochnikov, naprimer te, chto "sidyat" v ostatkah sverhnovyh.


    astro-ph/0309322 Sistemy zvezdnyh velichin v staryh katalogah zvezd (Magnitude systems in old star catalogues)
    Authors: Tomoko Fujiwara et al.
    Comments: 7 pages, 3 figures. Submitted to Astronomy & Astrophysics

    Zvezdnye velichiny vpervye byli vvedeny Gipparhom vo 2 g. do nashei ery. Sostavlennyi im katalog soderzhal 850 zvezd, 20-ti samym yarkim iz kotoryh byla prisvoena 1-ya zvezdnaya velichina. Etoi zhe koncepcii priderzhivalsya samyi izvestnyi antichnyi zvezdnyi katalog "Al'magest", sostavlennyi Ptolemeem v 137 g. nashei ery (kak schitaetsya). Zvezdnye velichiny svetil, poluchennyh nevooruzhennym glazom, privodyatsya eshe v semi starinnyh katalogah. Strogoe opredelenie shkaly zvezdnyh velichin bylo vvedeno Pogsonom tol'ko v 1856 g., ono ustanovilo logarifmicheskuyu zavisimost' mezhdu zvezdnoi velichinoi i intensivnost'yu izlucheniya zvezdy.

    Ukazannye starinnye katalogi byli issledovany v dannoi stat'e. Vyvod avtorov takov: shkala zvezdnyh velichin deistvitel'no logarifmicheskaya (a ne stepennaya, kak schitayut nekotorye psihologi). Bolee togo, esli otbrosit' samye yarkie i samye malochislennye zvezdy 1-i velichiny i samye trudnye dlya nablyudeniya predel'no slabye (6-i zvezdnoi velichiny), to otnoshenie intensivnostei zvezd otlichayushihsya na odnu zvezdnuyu velichinu okazhetsya blizkim k 2.512 - tochnomu znacheniyu koefficienta, figuriruyushego v zakone Pogsona

    m = -2.512 log I.


    astro-ph/0309326 Razvitie Vselennoi i novaya kosmologiya (Development of the Universe and New Cosmology)
    Authors: A.S. Sakharov, H. Hofer
    Comments: 9 pages; The German translation of this mini review can be uploaded from here
    Journal-ref: Bulletin ETH Zurich, 290 (2003) 42

    Nebol'shaya populyarnaya po suti stat'ya. Ochen' legkaya dlya chteniya. Poetomu rekomenduem.


    nucl-th/0309022 Effekt cvetnoi sverhprovodimosti na massu i radius kvarkovoi zvezdy (Effect of color superconductivity on the mass and radius of a quark star)
    Authors: Stefan B. Ruester, Dirk H. Rischke
    Comments: 16 pages, 9 figures

    Esli propustit' vtoroi razdel, soderzhashii tehnicheskie detali, to i ne specialistu mozhno uznat' koe-chto interesnoe pro kvarkovye zvezdy. Kratkoe rezyume sostoit iz dvuh punktov. Pervyi v meru banalen: avtory podtverzhdayut rezul'taty drugih issledovanii, chto nalichie cvetnoi sverhprovodimosti (eto kogda kvarki obrazuyut kuperovskie pary, konkretno v ispol'zovavsheisya modeli krasnye i zelenye kvarki obrazuyut anti-sinie kuperovskie pary) ne okazyvaet sushestvennogo vliyaniya na massy i radiusy kompaktnyh ob'ektov pri tipichnyh parametrah. Vtoroi vyvod menee banalen. Avtory zadalis' voprosom, a naskol'ko nado sdvinut' parametry (kotorye mozhno var'irovat' v ramkah sushestvuyushih neopredelennostei), chtoby byl zametnyi effekt. Okazalos', chto mozhno tak sdvinut' parametry, chto radiusy i massy vozrastut vdvoe, no ...... No togda eti kvarkovye zvezdy stanut takimi zhe (po masse i radiusu) kak obychnye neitronnye!


    My budem starat'sya hotya by perechislit' interesnye (dlya shirokoi publiki) stat'i, poyavivshiesya v razdele physics (vklyuchaya cross-listing).

    physics/0309046 Istoricheskaya zametka o tom, kak bylo otkryto svoistvo vodorodosoderzhashih materialov uvelichivat' radioaktivnost', vyszvannuyu neitronami (A Historical Note about how the Property was Discovered that Hydrogenated Substances Increase the Radioactivity Induced by Neutrons)
    Authors: Alberto De Gregorio
    Comments: 11 pages, 4 figures, to be published in "Il Nuovo Saggiatore" - the Italian version will be available at this http URL

    Lyubopytnaya zametka. V nei razbiraetsya dostatochno banal'nyi istoricheskii vopros: "Kogda tochno i pri kakih obstoyatel'stvah Enriko Fermi i ego gruppa uvideli i osoznali, chto voda i parafin uvelichivayut radioaktivnost', navedennuyu neitronami?" No ne vse tak prosto! Ne smotrya na to, chto epizod opisan mnozhestvo raz (prichem ochevidcami!) rabota s arhivnymi materialami gruppy pomogla poluchit' tochnuyu datu, otlichayushuyusya ot toi, chto privedena v memuarah Laury Fermi i dr. Eto otlichnyi primer takoi arhivnoi raboty.
    Nu a zakanchivaetsya zametka prosto kak detektiv, v duhe "prodolzhenie sleduet". Delo v tom, chto imeyushiesya arhivnye materialy obryvayutsya 26 marta 1938 g. Imenno v etot den' ischez Ettore Maiorana......


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