The R.A.P.Project "Prosto o slozhnom" "Astro-ph za pervuyu polovinu 2003 g." Nemnogo statistiki Predydushii vypusk (N58) Populyarno dlya professionalov Slovar' astroterminov Spisok missii i teleskopov Obzory UFN Stat'i SOZh ANKa Dnya 25.10.2003. Prizraki-2 23.10.2003. Karta Vselennoi 22.10.2003. Krivaya bleska oreola gamma-vspleska 20.10.2003. Prizraki galaktik Soderzhanie i bystryi perehod k razdelam obzora Stat'i nedeli "Luchshie iz luchshih" astro-ph/0310571 Karta Vselennoi astro-ph/0310723 Kosmologicheskie parametry soglasno SDSS i WMAP astro-ph/0310808 Putanica s rasshireniem: chastoe neponimanie kosmologicheskih gorizontov i sverhsvetovoe rasshirenie Vselennoi astro-ph/0310821 Vspyshki v blizhnem IK ot akkreciruemogo gaza vokrug sverhmassivnoi chernoi dyry v centre Galaktiki Otdel'nye stat'i Goryachii i teplyi mezhgalakticheskii gaz v napravlenii 3C 120? Effekt fluktuacii neitrinnogo potoka na malyh uglovyh masshtabah pri vzryve sverhnovoi Zatuhanie magnitnogo polya ili lish' zavisimost' diagrammy napravlennosti ot perioda? Rannii opticheskii oreol vspleska GRB 030418 i poterya massy zvezdoi-praroditelem Budushie vozmozhnosti dlya izucheniya pul'sarov v gamma-diapazone Karta Vselennoi Al'ternativa temnoi materii (?) Rezul'taty s Yuzhnogo polyusa, poluchennye na IK teleskope SPIREX Holodnyi akkrecionnyi disk v ul'tramoshnom istochnike X-9 v M81: ukazaniya na chernuyu dyru promezhutochnoi massy Uskoritel'nye eksperimenty - astrofizike Prilivnye ostatki i mezhgalakticheskie oblasti HII Izmerenie nashei vselennoi po dannym obzorov krasnyh smeshenii Mogut li obychnye sily ob'yasnit' anomal'noe uskorenie Pionerov 10 i 11 ? Otkrytie novogo tranzientnogo kanditata v magnitary: XTE J1810-197 Kartirovanie dalekih uchastkov Mlechnogo Puti po BHB-zvezdam na 70 < r < 130 kpk Metallichnost', obrazovanie planet i migraciya GRAPE-6: special'nyi parallel'ni komp'yuter dlya astrofizicheskogo modelirovaniya Pryamye poiski temnoi materii Podpitka akkrecionnyh diskov v aktivnyh yadrah galaktik za schet zvezd, stalkivayushihsya s diskom: vozmozhnoe ob'yasnenie sootnosheniya massa- dispersiya skorostei Ustoichivye gravizvezdy - al'ternativa chernym dyram? Kosmologicheskie parametry soglasno SDSS i WMAP Biblioteka sliyanii galaktik FLY. Parallel'nyi drevesnyi kod dlya kosmologicheskogo modelirovaniya. Rukovodstvo po primeneniyu Rezul'taty Archeops Magnitogidrodinamika sglazhennyh chastic Galakticheskie dvoinye kak istochniki gravitacionnyh voln Galaktiki s dvoinoi peremychkoi: katalog galaktik s peremychkoi so vtoroi peremychkoi i vnutrennim diskom Soglasovannye uravneniya dlya kosmologii Randall-Sandram: test dlya inflyacii v mire bran Putanica s rasshireniem: chastoe neponimanie kosmologicheskih gorizontov i sverhsvetovoe rasshirenie Vselennoi Vspyshki v blizhnem IK ot akkreciruemogo gaza vokrug sverhmassivnoi chernoi dyry v centre Galaktiki Vosstanovlenie chisla solnechnyh pyaten na masshtabe tysyacheletiya: ukazanie na neobychnuyu aktivnost' Solnca s 1940-h gg. Chislennoe issledovanie relyativistskogo kollapsa Ukazaniya na sushestvovanie fundamental'nogo predela na massu zvezdy po dannym ob obrazovanii zvezd v skopleniyah Vzaimosvyazi mezhdu Bol'shim i Malym Iz razdela physics Nabrosok plana neitrinnoi observatorii 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. Obsudit' na forume Scientific.RU Obsudit' na forume Zvezdocheta Avtory proekta Sergei Popov Mihail Prohorov Postav'te u sebya nashu knopku! Proekt razmeshen na saitah: Vy mozhet takzhe razmestit' na svoem saite nashu lentu obzorov Novostnye lenty Novosti astronomii ot PRAO Tekushie otkrytiya v FECh Novosti kosmonavtiki Novosti ot UFN Informnauka Perst Podpiska na rassylku obzorov na Subscribe.Ru

Obzory preprintov astro-ph Vypusk N59 astro-ph za 19 - 31 oktyabrya 2003 goda: izbrannye stat'i Referaty otdel'nyh statei astro-ph/0310476 Goryachii i teplyi mezhgalakticheskii gaz v napravlenii 3C 120? (A warm hot intergalactic medium towards 3C 120?) Authors: B. McKernan et al. Comments: 4 pages, uses emulateapj.cls, ApJL (accepted) Okolo poloviny barionov vo Vselennoi dolzhny nahoditsya v teplom ili goryachem gaze v mezhgalakticheskom prostranstve. Obnaruzhit' eto veshestvo ochen' nelegko. Ono dolzhno proyavlyat' sebya v vide detalei v spektrah dalekih galaktik. Avtory etoi raboty izuchali rentgenovskii spektr seifertovskoi galaktiki, poluchennyi na Chandre. Issledovateli v samom dele obnaruzhili sil'nuyu spektral'nuyu detal', kotoruyu oni svyazyvayut s teplym/goryachim mezhgalakticheskim gazom. Eto nablyudenie podtverzhdaet raschety, soglasno kotorym sushestvuyut volokna takogo gaza. Himicheskii sostav eto veshestva mozhet zametno otlichat'sya ot solnechnogo. astro-ph/0310481 Effekt fluktuacii neitrinnogo potoka na malyh uglovyh masshtabah pri vzryve sverhnovoi (Effects of Small-Scale Fluctuations of Neutrino Flux in Supernova Explosions) Authors: Hideki Madokoro, Tetsuya Shimizu, Yuko Motizuki Comments: 5 pages, including 4 figures, to be published in the proceedings of IAU Colloquium 192, `SUPERNOVAE (10 years of SN1993J)'', Valencia, Spain, eds. J.M. Marcaide and K.W. Weiler (Springer Verlag) V fizike vzryva sverhnovoi est' eshe ochen' i ochen' mnogo neponyatnogo. V naibolee prorabotannoi na segodnyashnii den' modeli sbros obolochki proishodit za schet moshnogo potoka neitrino. Odnako, poka v raschetah ne udaetsya poluchit' nuzhnuyu energetiku vzryva pri dannoi neitrinnoi svetimosti. Yaponskie uchenye rassmatrivali zavisimost' energii vzryva ot parametrov fluktuacii neitrinnogo potoka. Pust' u nas zadana polnaya neitrinnaya svetimost'. No pust' my mozhem zadavat' nebol'shie uglovye fluktuacii potoka. Okazyvaetsya, chto eto mozhet pomoch' v reshenii problemy sbrosa obolochki! Poka raschety provedeny dlya dostatochno prostoi modeli. No rezul'taty obnadezhivayut. Neobhodimy bolee detal'nye raschety. astro-ph/0310483 Zatuhanie magnitnogo polya ili lish' zavisimost' diagrammy napravlennosti ot perioda? (Magnetic field decay, or just period-dependent beaming?) Authors: Joeri van Leeuwen, Frank Verbunt Comments: 4 pages, 2 figures. To appear in "Young Neutron Stars and Their Environments" (IAU Symposium 218, ASP Conference Proceedings), eds F. Camilo and B. M. Gaensler Kak izvestno, neitronnye zvezdy - eto svoeobraznye astrofizicheskie laboratorii, gde veshestvo nahoditsya v ekstremal'nom sostoyanii. Poetomu protekanie razlichnyh fizicheskih processov v etih kompaktnyh ob'ektah predstavlyaet obshii interes. Odnim iz takih processov yavlyaetsya evolyuciya magnitnogo polya. Neitronnye zvezdy obladayut samymi sil'nymi magnitnymi polyami vo Vselennoi (u naibolee zamagnichennyh iz izvestnyh segodnya ob'ektov oni prevoshodyat 1014 Gs). My ne znaem, kak takie polya generiruyutsya (prostym szhatiem s sohraneniem magnitnogo potoka tut ne oboitis'), i ne znaem, kak oni izmenyayutsya so vremenem. Sobstvenno, izmenenie mozhet byt' odno - polya mogut zatuhat'. Polya porozhdayutsya tokami, kotorye tak ili inache dolzhny umen'shat'sya. Vopros v tom naskol'ko bystro i sushestvenno. Pryamye dannye nablyudenii ne dayut odnoznachnogo otveta o povedenii magnitnogo polya neitronnyh zvezd. Naprimer, molodye pul'sary imeyut neskol'ko bOl'shie polya, chem bolee starye istochniki etogo tipa. No statistika nevelika, a krome togo mogut byt' vazhny raznoobraznye effekty selekcii. Poetomu obychno primenyaetsya modelirovanie - populyacionnyi sintez. I tut tozhe raznye gruppy poluchayut raznye rezul'taty. Avtory dannoi zametki polemiziruyut s temi, kto govorit o zametnom umen'shenii magnitnogo polya za vremya poryadka 10 millionov let. Kak pokazano v etoi rabote, vvedenie dopolnitel'nogo parametra - zavisimosti shiriny puchka izlucheniya ot perioda vrasheniya neitronnoi zvezdy - pozvolyaet opisat' dannye nablyudenii bez zatuhaniya polya. Takaya zavisimost' imeet pod soboi horoshuyu osnovu, poetomu k rezul'tatam issledovaniya stoit otnestis' ser'ezno. astro-ph/0310501 Rannii opticheskii oreol vspleska GRB 030418 i poterya massy zvezdoi-praroditelem (The Early Optical Afterglow of GRB 030418 and Progenitor Mass Loss) Authors: E. S. Rykoff et al. Comments: Five pages, four figures, uses emulateapj class file. Accepted to Astrophysical Journal Letters Poka udalos' zaregistrirovat' lish' neskol'ko rannih opticheskih oreolov (poslesvechenii) kosmicheskih gamma-vspleskov. Odnako dazhe eta malen'kaya vyborka uzhe pokazyvaet raznoobrazie svoistv. Avtory raboty opisyvayut nablyudeniya takih yavlenii, a takzhe obsuzhdayut vozmozhnuyu interpretaciyu razlichii. V predlagaemoi imi modeli, gde gamma-vsplesk svyazan s kollapsom massivnoi zvezdy, klyuchevuyu rol' igraet zvezdnyi veter. Opticheskoe poslesvechenie opredelyaetsya strukturoi, obrazovannoi zvezdnym vetrom v techenie zhizni zvezdy. miniobzor astro-ph/0310509 Budushie vozmozhnosti dlya izucheniya pul'sarov v gamma-diapazone (Future Facilities for Gamma-Ray Pulsar Studies) Authors: D. J. Thompson Comments: To appear in "Young Neutron Stars and Their Environments" (IAU Symposium 218, ASP Conference Proceedings), eds F. Camilo and B. M. Gaensler Sovremennaya astronomiya - vsevolnovaya. Lyuboi ob'ekt stremyatsya izuchit' v raznyh diapazonah spektra. Pul'sary - ne isklyuchenie. Profili impul'sov semi pul'sarov v raznyh diapazonah. Na nizhnei osi ukazan period vrasheniya neitronnoi zvezdy v millisekundah. V blizhaishie neskol'ko let budet zapusheno neskol'ko kosmicheskih apparatov, kotorye v chastnosti smogut nablyudat' gamma-izluchenie ot odinochnyh neitronnyh zvezd. Ob etom i rasskkazyvaetsya v obzore. obzor astro-ph/0310571 Karta Vselennoi (A Map of the Universe) Authors: J. Richard Gott III et al. Comments: Additional material accessible on the web at: http://www.astro.princeton.edu/~mjuric/universe/ Vot tak! Ni bol'she, ni men'she. Karta prostiraetsya ot okrestnostei nashei planety do kosmicheskogo reliktovogo izlucheniya (po suti imeetsya vvidu "poverhnost' poslednego rasseyaniya", samo-to izluchenie est' i vokrug nas) i vklyuchaet v sebya novye dannye (poyas Koipera, SDSS etc.). Chitaite ob etom otdel'nuyu ANKU. miniobzor astro-ph/0310572 Al'ternativy temnoi materii (?) (Alternatives to Dark Matter (?)) Authors: Anthony Aguirre Comments: 10 pages, to appear in the proceedings of the IAU Symposium 220 "Dark matter in galaxies", eds. S. Ryder, D.J. Pisano, M. Walker and K. Freeman Avtor rassmatrivaet razlichnye proveryaemye al'ternativy temnoi materii v galaktikah i skopleniyah galaktik. Pokazano, chto mnogie iz nih mogut byt' blagopoluchno otbrosheny. Osoboe vnimanie udeleno MOND-MODified Newtonian Dynamics. astro-ph/0310584 Rezul'taty s Yuzhnogo polyusa, poluchennye na IK teleskope SPIREX (Results from the South Pole InfraRed EXplorer Telescope) Authors: J.M. Rathborne, M.G. Burton Comments: 8 pages, 1 figure (low resolution), To appear in the IAU Highlights of Astronomy, Volume 13, Edited by O. Engvold & M. Burton, Published by the Astronomical Society of the Pacific SPIREX (South Pole InfraRed EXplorer Telescope) - nebol'shoi 60-santimetrovyi teleskop, ustanovlennyi v 1994 g. v Antarktide na stancii Amundsen-Skott. Odnoi iz zadach instrumenta bylo pokazat' na praktike, chto Yuzhnyi polyus yavlyaetsya kraine udobnoi ploshadkoi dlya nablyudenii v IK diapazone. Deistvitel'no, mnogie uchastki v Antarktide nahodyatsya dostatochno vysoko nad urovnem morya, a krome togo tam ochen' holodno. Avtory privodyat rezul'taty nablyudenii na SPIREX. Konechno, malen'kii instrument ne mozhet tyagat'sya s 8-10-metrovymi gigantami. No ideya sostoit v osnovnom v illyustracii astroklimaticheskih vozmozhnostei Antarktidy dlya nuzhd infrakrasnoi astronomii. astro-ph/0310617 Holodnyi akkrecionnyi disk v ul'tramoshnom istochnike X-9 v M81: ukazaniya na chernuyu dyru promezhutochnoi massy (Revealing a Cool Accretion Disk in the Ultraluminous X-ray Source M81 X-9 (Holmberg IX X-1): Evidence for an Intermediate Mass Black Hole) Authors: J. M. Miller et al. Comments: 8 pages, 6 figres, 3 in color, uses emulateapj.sty and apjfonts.sty submitted to ApJ Napomnim, chto eshe neskol'ko let nazad elementom standartnoi kartiny byli tri tipa chernyh dyr: pervichnye (naibolee mnogochislennye na segodnyashnii den' dolzhny imet' massu poryadka 1015 g.), ostavshiesya ot rannei epohi zhizni Vselennoi, zvezdnye (massoi poryadka 5-10 mass Solnca), obrazovavshiesya iz massivnyh zvezd v rezul'tate kollapsa, i sverhmassivnye (s massami ot 106 do 1010 mass Solnca). V poslednee vremya poyavlyayutsya razlichnye ukazaniya na sushestvovanie chernyh dyr promezhutochnyh mass v sotni mass Solnca. Odnimi iz kandidatov v takie ob'ekty yavlyayutsya t.n. sverhmoshnye (Ultraluminous) rentgenovskie istochniki. V dannoi rabote avtory issledovali spektr odnogo iz takih istochnikov. Odna iz komponent spektra interpretiruetsya kak vklad holodnogo (po merkam akkrecii na kompaktnye ob'ekty) diska s temperaturoi 0.17-0.29 keV. Masshtabirovanie svoistv diskov izvestnyh galakticheskih kandidatov v chernye dyry privodit k sleduyushemu rezul'tatu: my vidim akkreciyu na chernuyu dyru s massoi poryadka 1000 mass Solnca. Konechno, eto model'nyi rezul'tat. Neobhodimy dal'neishie issledovaniya. No tak ili inache, a svoistva istochnika X-9 v M81 yavlyayutsya ser'eznym argumentom. Storonnikam anizotropnogo izlucheniya pridetsya potruditsya, chtoby ob'yasnit' dannye nablyudeniya bez privlecheniya stol' massivnoi chernoi dyry. astro-ph/0310625 Uskoritel'nye eksperimenty - astrofizike (Accelerator Experiments for Astrophysics) Authors: Johnny S. T. Ng Comments: 12 pages, To be published in the proceedings of the Joint 28th ICFA Workshop on Quantum Aspects of Beam Physics, Hiroshima, Japan, Jan. 7-11, 2003 Vselennuyu ne zrya nazyvayut "uskoritelem dlya bednyh". Priroda sama predostavlyaet nam chasticy s energiyami do 1020 eV (i dazhe vyshe), kotorye dazhe v mechtah nedostizhimy dlya laboratornoi fiziki. No vse ponimayut preimushestva obychnogo "nastol'nogo" eksperimenta pered astronomicheskimi nablyudeniyami. Eto tochnost', kontroliruemost' i t.p. Poetomu interesno obsudit' takoi povorot sobytii: chto sovremennaya uskoritel'naya fizika mozhet dat' astrofizike. Krome kalibrovki priborov i t.p. avtor obsuzhdaet neskol'ko vozmozhnyh eksperimentov. Odin iz nih - eto elektron-pozitronnye puchki v kachestve relyativistskoi plazmy. Ideya v tom, chtoby smeshat' elektronnyi i pozitronnyi puchki, kotorye dadut potok, analogichnyi relyativistskoi e+e-plazme. Otmetim rabotu "Supernova Science at Spallation Neutron Sources", v kotoroi obsuzhdaetsya rol' laboratornyh eksperimentov dlya ponimaniya fiziki sverhnovyh. astro-ph/0310632 Prilivnye ostatki i mezhgalakticheskie oblasti HII (Tidal Remnants and Intergalactic HII Regions) Authors: T. Oosterloo et al. Comments: To appear in the proceedings of the IAU Symposium #217, Recycling Intergalactic and Interstellar Matter, eds. P.-A. Duc, J. Braine, and E. Brinks, 6 pages with low resolution figures. The full paper with high resolution images can be downloaded from http://www.astron.nl/~morganti/Papers/cloud.ps.gz My uzhe pisali o prizrakah galaktik. Vot eshe odin interesnyi primer takih prividenii. Avtory obnaruzhili dva nebol'shih oblaka ionizovannogo vodoroda (HII) v bednoi gruppe galaktik vokrug NGC 1490. Oblasti HII lezhat kak minimum v 100 kpk ot blizhaishei opticheskoi galaktiki. Zato oni svyazany s oblastyami neitral'nogo vodoroda (HI), kotorye obrazuyut cepochku dlinoi 500 kpk. Metallichnost' etih oblakov blizka k solnechnoi, chto ne pozvolyaet govorit' ob ih pervichnoi prirode. Naibolee veroyatno, chto eto ostatki galaktiki, kotoraya byla razrushena prilivnymi silami. Nalichie oblastei ionizacii (HII) govorit o tom, chto imeet mesto process zvezdoobrazovaniya. Avtory polagayut, chto vokrug vzaimodeistvuyushih galaktik mozhet byt' mnogo takih oblakov neitral'nogo vodoroda. A my pozvolim sebe pofantazirovat' o planete na orbite vokrug zvezdy, obrazovavsheisya v takom oblake v mezhgalakticheskom prostranstve. Predstav'te, nebo fakticheski bez zvezd, zato "visit" galaktika, kotoraya svoim prilivnym vozdeistviem vse eto i ustroila... Otmetim, v zaklyuchenie, chto poyavilas' i drugaya stat'ya "Discovery of Intergalactic HII Regions", gde takzhe govoritsya ob otkrytii vnegalakticheskih oblastei HII. obzor astro-ph/0310642 Izmerenie nashei vselennoi po dannym obzorov krasnyh smeshenii (Measuring our universe from galaxy redshift surveys) Authors: Ofer Lahav, Yasushi Suto Comments: 79 pages, 29 figures, invited review article submitted to Living Reviews in Relativity, http://relativity.livingreviews.org Bol'shie obzory krasnyh smeshenii galaktik - vazhnoe dostizhenie sovremennoi nablyudatel'noi astronomii. V chastnosti, eto vazhnyi instrument sovremennoi kosmologii. Imenno o etom, a takzhe o razvitii dannogo napravleniya issledovanii, i rasskazyvaetsya v obzore. gr-qc/0310088 Mogut li obychnye sily ob'yasnit' anomal'noe uskorenie Pionerov 10 i 11 ? (Can conventional forces really explain the anomalous acceleration of Pioneer 10/11 ?) Authors: J. P. Mbelek, M. Michalski Comments: 9 pages, no figure Anomal'noe uskorenie sputnikov Pioner do sih por ne daet pokoya mnogim issledovatelyam. Chto tol'ko ne predlagali dlya ob'yasneniya effekta. V dannoi rabote rassmatrivaetsya vopros ob ob'yasnenii effekta bez privlecheniya ekzotiki. Raznicu v povedenii Pionera - 10 i Pionera - 11 udaetsya ob'yasnit' bez novoi fiziki (effekt okazalsya svyazannym s vrasheniem apparatov). A vot sam effekt anomal'nogo uskoreniya vozmozhno taki trebuet ekzotiku. (Blagodarim S.I. Blinnikova za kommentarii po etoi rabote.) astro-ph/0310665 Otkrytie novogo tranzientnogo kandidata v magnitary: XTE J1810-197 (Discovery of a New Transient Magnetar Candidate: XTE J1810-197) Authors: A. I. Ibrahim et al. Comments: Submitted to ApJL; 4 pages; 4 figures Sobstvenno otkryt novyi rentgenovskii pul'sar s periodom 5.54 sekundy. Period uvelichivaetsya s tempom poryadka 10-11 s/s. Esli eto tormozhenie po magnito-dipol'noi formule, to pole poluchaetsya 3 1014 Gs. Eto magnitarnoe pole. Krome togo, net nikakih sledov vtorogo kompan'ona. Vse vmeste delaet ob'ekt klassicheskim anomal'nym rentgenovskim pul'sarom. Istochnik byl naiden takzhe i v arhivnyh dannyh. No togda on byl gorazdo slabee. Eto oznachaet, chto mozhet byt' dva sostoyaniya anomal'nogo pul'sara: aktivnoe i spokoinoe. A eto, v svoyu ochered', oznachaet, chto mnogo magnitarov mozhet skryvat'sya ot nas. astro-ph/0310675 Kartirovanie dalekih uchastkov Mlechnogo Puti po BHB-zvezdam na 70 < r < 130 kpk (Mapping the Remote Milky Way Halo using BHB stars at 70 < r < 130 kpc) Authors: L. Clewley et al. Comments: 2 pages, 1 figure, to appear in the proceedings of the IAU Symposium 220: "Dark matter in galaxies", eds. S. Ryder, D.J. Pisano, M. Walker and K. Freeman, Sydney, July 2003, to be published in the ASP conference series Vo mnogom vopros "gde granica nashei Galaktiki?" pohozh na vopros "gde granica Solnechnoi sistemy?". Na vtoroi mnogie otvechayut "za orbitoi Plutona", chto sovershenno neverno. Tochno takzhe klassicheskaya kartinka nashei Galaktiki, obryvayushayasya gde-to na 15-20 kpk ot centra ne sovsem verna. Pokuda est' zvezdy (pust' i nemnogchislennye) ili voobshe chto-to, chto vrashaetsya vokrug Mlechnogo Puti (t.e. gravitacionno s nim svyazano v, skazhem tak, podchinennom sostoyanii) i ne yavlyaetsya otdel'noi galaktikoi (tipa karlikovyh chlenov Mestnoi gruppy), to eto eshe nash Zvezdnyi Dom. Samye dalekie zvezdy sostavlyayut t.n. galo galaktiki. I ih mozhno prosledit' na rasstoyaniya v 100-200 kpk. Avtory ispol'zovali dannye Sloanovskogo obzora (SDSS) po golubym zvezdam gorizontal'noi vetvi (BHB - blue horizontal branch). Blagodarya etim ob'ektam udalos' "propisat'" nashu Galaktiku do rasstoyanii v 130 kpk. Massa Mlechnogo Puti okazyvaetsya ravnoi 1.7(+3 -0.6) 1012 mass Solnca. Rabota prodolzhaetsya. V budushem ozhidaetsya sushestvennoe snizhenie neopredelennosti v opredelenii massy. astro-ph/0310695 Metallichnost', obrazovanie planet i migraciya (Metallicity, planetary formation and migration) Authors: M. Livio, J. E. Pringle Comments: 4 pages Imeyushiesya dannye po ekzoplanetam govoryat o nalichii chetkoi korrelyacii mezhdu veroyatnost'yu uvidet' planetu i metallichnost'yu zvezdy. Mozhno bylo by polagat', chto eto effekt selekcii, svyazannyi vot s chem. Sovremennye metodiki obnaruzhivayut massivnye planety na blizkih orbitah (goryachie yupitery). Polagayut, chto planety migrirovali na eti orbity s bolee dalekih. Znachit, mozhno spekulirovat' o korrelyacii metallichnost'-migraciya. Avtory dannoi raboty vnimatel'no issledovali takuyu vozmozhnost' i ne nashli nikakih osnovanii v pol'zu dannoi gipotezy. Stalo byt', zaklyuchayut oni, est' real'naya korrelyaciya mezhdu metallichnost'yu i planetami. miniobzor astro-ph/0310702 GRAPE-6: special'nyi parallel'ni komp'yuter dlya astrofizicheskogo modelirovaniya (GRAPE-6: The massively-parallel special-purpose computer for astrophysical particle simulation) Authors: Junichiro Makino et al. Comments: 25 pages, Accepted for publication in PASJ, scheduled to appear in Vol.55, No. 6 Daetsya obzor novoi versii parallel'nyh superkomp'yuterov serii GRAPE (GRAvity piPE) dlya modelirovaniya metodom mnogih tel, aktivno primenyayushimsya v astrofizike (struktura i vzaimodeistvie galaktik, zvezdnye skopleniya, krupnomasshtabnaya struktura, ustoichivost' i formirovanie planetnyh sistem i t.p.). Seriya nachalas' v nachale 90-h godov i, razumeetsya, moshnost' komp'yuterov bystro rosla. Komp'yutery GRAPE-3 i -5 proizvodilis' dazhe malymi seriyami, chto pozvolilo sdelat' ih ne ochen' dorogimi (t.e. dostupnymi bol'shinstvu krupnyh universitetov, gde byli sootvetstvuyushie gruppy issledovatelei). GRAPE-6 imeet 2048 processorov. Maksimal'naya skorost' - 64 Teraflopa. Stat'ya budet bezuslovno interesna vsem, kto interesuetsya chislennymi metodami, komp'yuternym modelirovanie i t.p. miniobzor astro-ph/0310707 Pryamye poiski temnoi materii (Direct Dark Matter Searches) Authors: Wolfgang Seidel Comments: 7 pages, Proceedings Physics in Collision, Zeuthen, Germany, 2003 Ochen' korotkii obzor po popytkam neposredstvennoi (laboratornoi) registracii chastic temnoi materii. Po suti sam obzor zanimaet menee 5 stranic, gde perechisleny osnovnye tipy detektorov i privedeny primery deistvuyushih (ili uzhe otrabotavshih) ustanovok. astro-ph/0310717 Podpitka akkrecionnyh diskov v aktivnyh yadrah galaktik za schet zvezd, stalkivayushihsya s diskom: vozmozhnoe ob'yasnenie sootnosheniya massa- dispersiya skorostei (Feeding Accretion Disks in Active Galactic Nuclei with Stars Crashing on the Disk: A Possible Explanation of the M-sigma Relation) Authors: Jordi Miralda-Escude, Juna A. Kollmeier Comments: 21 pages, submitted to ApJ Kak my uzhe pisali, sushestvuet problema, kak bystro sozdat' sverhmassivnye chernye dyry v yadrah galaktik. Mehanizm dolzhen ob'yasnyat' diapazon mass, skorost' obrazovaniya (est' dannye po massivnym dyram v epohu poyavleniya samyh pervyh galaktik), a takzhe razlichnye korrelyacii parametrov. V etoi stat'e avtory predlagayut takuyu model'. Vokrug chernoi dyry (kak sozdat' "zachatochnuyu" chernuyu dyru v principe ponyatno) sushestvuet tonkii akkrecionnyi disk. Zvezdy iz central'noi chasti galaktiki dinamicheskim vzaimodeistviem vybrasyvayutsya na vysokie vytyanutye orbity. Sootvetstvenno, zatem oni neskol'ko raz peresekayut disk v svoem vrashenii vokrug galakticheskogo centra. Pri kazhdom takom peresechenii zvezda teryaet uglovoi moment, i nakonec "vlivaetsya" v disk. Avtory obsuzhdayut dostoinstva i nedostatki modeli, i predlagayut nablyudatel'nye testy dlya proverki bazovah predpolozhenii i osnovnyh predskazanii scenariya. gr-qc/0310107 Ustoichivye gravizvezdy - al'ternativa chernym dyram? (Stable gravastars - an alternative to black holes?) Authors: Matt Visser, David L. Wiltshire Comments: 19 pages, 5 figures; uses iopart.cls, setstack.sty Nedavno v SMI (vklyuchaya Scientific American) proshla novost' (podannaya v neskol'ko preuvelichennom klyuche) o rabote Mazura i Mottoly po al'ternative chernym dyram. Avtory predlozhili model', v kotoroi blagodarya fazovomu perehodu v sostoyanie ves'ma specificheskogo kondensata obrazuetsya ob'ekt bez singulyarnosti, gorizonta sobytii i t.p. Takzhe avtory polagayut, chto oni reshili tem samym problemu bol'shoi entropii chernyh dyr. Sami Mazur i Mottola rassmotreli lish' teplovuyu ustoichivost' naidennogo imi resheniya. V dannoi rabote Visser i Viltshir rassmatrivayut dinamicheskuyu ustoichivost' resheniya, podobnogo poluchennomu Mazurom i Motolloi. astro-ph/0310723 Kosmologicheskie parametry soglasno SDSS i WMAP (Cosmological parameters from SDSS and WMAP) Authors: M. Tegmark et al. Comments: SDSS data and ppt figures available at http://www.hep.upenn.edu/~max/sdsspars.html My mnogo raz pisali ob opredelenii kosmologicheskih parametrov po dannym poslednih eksperimentov, vklyuchaya Sloanovskii cifrovoi obzor neba (SDSS) i sputnik WMAP, izuchayushii reliktovyi fon. Tegmark i soavtory iz komand SDSS i WMAP predstavlyayut po-vidimomu naibolee polnoe na segodnyashnii den' issledovanie. Ne budem vdavat'sya v detali - oni privedeny v stat'e (a takzhe v soputstvuyushih rabotah, o kotoryh chut' nizhe). Privedem rezul'taty: postoyannaya Habbla: 70 km/s/Mpk plotnost' veshestva: 0.3 massa neitrino: <0.6 eV. Avtory detal'no opisyvayut parametry, modeli, kotorye oni ispol'zuyut i t.p., soprovozhdaya eto ponyatnymi illyustraciyami. V otdel'noi stat'e "The 3D power spectrum of galaxies from the SDSS" opisyvayutsya rezul'taty Sloanovskogo obzora po issledovaniyu krupnomasshtabnoi struktury na baze izmerenii 205,443 galaktik. Opyat' zhe vnimatel'no issleduyutsya vozmozhnye istochniki oshibok i neopredelennostei. Eto bol'shaya stat'ya, soderzhashaya 40 risunkov. odin iz kotoryh my privodim. Na risunke privedeno raspredelenie >67000 galaktik vblizi ekvatorial'noi ploskosti. Cvet kodiruet absolyutnuyu zvezdnuyu velichinu. Upomyanem zdes' zhe stat'yu Bonda i dr. "Cosmic microwave background snapshots: pre-WMAP and post-WMAP". V nei, kak yasno iz nazvaniya, rech' idet o nablyudeniyah mikrovolnovogo (reliktovogo) fona do i posle WMAP. Po suti eto obzor. Avtory takzhe vyvodyat osnovnye kosmologicheskie parametry. Vozmozhno, ne lishne upomyantu' i rabotu "Morphology of Mock SDSS Catalogues", v kotoroi dannye SDSS ispol'zuyutsya dlya izucheniya sverhskoplenii. Vazhnym ob'edinyayushim momentom vseh etih rabot yavlyaetsya sozdanie soglasovannoi kosmologicheskoi kartiny (sm. takzhe ANKU "Karta Vselennoi"). astro-ph/0310734 Biblioteka sliyanii galaktik (A library of galaxy mergers) Authors: F. Combes, A.-L. Melchior Comments: 2 pages, 2 figures, contribution in Scientific Highlights, SF2A-2003, to be published by EDP-Sciences Korotkii otchet o hode rabot nad interesnym proektom. Avotry postavili svoei zadachei s pomosh'yu chislennogo modelirovaniya poluchit' biblioteku slivayushihsya galaktik. Kak horosho izvestno, vzaimodeistvie galaktik mozhet porozhdat' ves'ma prichudlivye konfiguracii. Bylo by interesno zaranee imet' nabor simulyacii. Dlya togo, chtoby eto davalo otdachu, nuzhno imet' okolo 1000 smodelirovannyh sliyanii. Bol'shaya rabota! astro-ph/0310786 FLY. Parallel'nyi drevesnyi kod dlya kosmologicheskogo modelirovaniya. Rukovodstvo po primeneniyu (FLY. A parallel tree N-body code for cosmological simulations. Reference Guide) Authors: V. Antonuccio-Delogu, U. Becciani, D. Ferro Comments: 29 pages, 4 figures. Code included in CPC program library Catalogue identifier: ADSC. Comput. Phys. Commun. 155(2003)159 Sushestvuet dostatochno mnogo otkrytyh kodov dlya samyh razlichnyh celei. V tom chisle i dlya kosmologicheskogo modelirovaniya. V dannoi stat'e avtory predstavlyayut opisanie programmy FLY. Rabota, razumeetsya, ochen' tehnicheskaya, no budet interesna tem, kto interesuetsya chislennym modelirovaniem. astro-ph/0310788 Rezul'taty Archeops (Archeops results) Authors: J.-Ch. Hamilton, A. Beno\^{\i}t and the Archeops Collaboration Comments: 8 pages, 6 figures, to appear in C.R. Physique Opisany rezul'taty poslednego poleta balonnogo eksperimenta Archeops po izmereniyu mikrovolnovogo izlucheniya. Krome, estestvenno, kosmologicheskih rezul'tatov, opisany i drugie. Osobyi interes predstavlyaet podrobnaya karta diffuznogo submillimetrovogo izlucheniya v ploskosti nashei Galaktiki (napomnim, chto pri postroenii polnoi karty reliktovogo fona prihoditsya vychitat' vklad Galaktiki, a eto sovsem neprostoe delo). Karta Galaktiki na volne 353 GGc. astro-ph/0310789 Magnitogidrodinamika sglazhennyh chastic (Smoothed Particle Magnetohydrodynamics I. Algorithms and tests in one dimension) Authors: D.J. Price, J.J. Monaghan Comments: 16 pages, 7 figures, accepted to MNRAS Dve stat'i (vtoraya "Smoothed Particle Magnetohydrodynamics II. Variational principles and variable smoothing length terms"), posvyashennye modelirovaniyu metodom sglazhennyh chastic (Smoothed Particle Hydrodynamics (SPH)). Predlozhen novyi algoritm, kotoryi proveren mnozhestvom odnomernyh testov, predstavlennymi v etih dvuh rabotah. Predpolagaetsya, chto algoritm budet kraine polezen v astrofizicheskih prilozheniyah (vklyuchaya neideal'nuyu MGD). miniobzor astro-ph/0310800 Galakticheskie dvoinye kak istochniki gravitacionnyh voln (Galactic Binaries as Sources of Gravitational Waves) Authors: G. Nelemans Comments: Invited talk to appear in "The Astrophysics of Gravitational Wave Sources" (Maryland, April 2003), AIP in press, J. Centrella (ed) Dvoinye sistemy yavlyayutsya odnimi iz naibolee ochevidnyh kandidatov v istochniki gravitacionnyh voln (sm. takzhe obzor v UFN na russkom yazyke. Ssylka na spisok obzorov v levoi kolonke). Avtor rassmatrivaet v osnovnom nizkochastotnoe izluchenie, kotoroe smozhet registrirovat' kosmicheskii interferometr LISA (spisok ssylok na stranicy missii takzhe v levoi kolonke). Obsuzhdaetsya vozmozhnost' obnaruzheniya istochnikov LISA v elektromagnitnom diapazone, a takzhe prilozheniya k evolyucii dvoinyh sistem. katalog astro-ph/0310806 Galaktiki s dvoinoi peremychkoi: katalog galaktik s peremychkoi so vtoroi peremychkoi i vnutrennim diskom (Double-Barred Galaxies: I. A Catalog of Barred Galaxies with Secondary Bars and Inner Disks) Authors: Peter Erwin Comments: LaTeX, 25 pages, 6 EPS figures. Submitted to Astronomy & Astrophysics. Version with full-resolution figures available at http://www.iac.es/galeria/erwin/research/ Katalog iz 67 galaktik s interesnoi morfologiei. V stat'e est' lyubopytnye illyustracii, kotorye pokazyvayut, kak vyglyadyat dvoinye peremychki (bary), i kak raznye struktury maskiruyutsya pod dvoinye bary. hep-ph/0310304 Soglasovannye uravneniya dlya kosmologii Randall-Sandram: test dlya inflyacii v mire bran (Consistency equations in Randall-Sundrum cosmology: a test for braneworld inflation) Authors: Gianluca Calcagni Comments: 13 pages, to be published in JCAP Esli vy pridumali "sumasshedshuyu" shemu miroustroistva, to vam srazu nado zadumat'sya nad vozmozhnost'yu proverki vashei teorii. Prichem vazhno ne tol'ko, chtoby vasha teoriya ob'yasnyala vse to, chto i drugie. Vazhno naiti kriticheskii test: chto smoglo by razdelit' proyavleniya raznyh struktur. V etoi rabote avtor rassmatrivaet odin iz variantov brannogo mira Randall-Sandram. Pokazano, kak budushie eksperimenty smogut razlichit' zhivem li my v sootvetstvuyushem mire bran ili net. Vsem!Vsem!Vsem! astro-ph/0310808 Putanica s rasshireniem: chastoe neponimanie kosmologicheskih gorizontov i sverhsvetovoe rasshirenie Vselennoi (Expanding Confusion: common misconceptions of cosmological horizons and the superluminal expansion of the Universe) Authors: Tamara M. Davis, Charles H. Lineweaver Comments: To appear in Publications of the Astronomical Society of Australia, 26 pages (preprint format), 6 figures Ochen' interesnaya i vazhnaya stat'ya! Ona soderzhit "pedagogicheskii" razbor shiroko rasprostranennyh zabluzhdenii otnositel'no rasshireniya Vselennoi. Rasshirenie Vselennoi - yavlenie nastol'ko neobychnoe i strannoe, chto tut legko zaputat'sya. Korotkii vopros kolleg pokazal, chto v golovah astrofizikov i pravda sushestvuet putanica, opisannaya v stat'e. V pervuyu ochered' rech' idet o voprose: "Mozhno li nablyudat' galaktiki, udalyayushiesya ot nas bystree skorosti sveta?" Pravil'nyi otvet - "da". Nado pokayatsya, chto i my vnesli vklad v rasprostranenie zabluzhdenii. Uspokaivaet lish' privedennyi v stat'e spisok, gde perechisleny naibolee "gromkie" ssylki (vklyuchaya knigi i stat'i Devisa, Liddla i dr.), gde takzhe govoritsya o principial'noi nevozmozhnosti nablyudeniya galaktik, ch'ya skorost' udaleniya ot nas (svyazannaya s rasshireniem Vselennoi) pevyshaet skorost' sveta. Ochen' sovetuem prochest' i razobrat'sya! astro-ph/0310821 Vspyshki v blizhnem IK ot akkreciruemogo gaza vokrug sverhmassivnoi chernoi dyry v centre Galaktiki (Near-infrared flares from accreting gas around the supermassive black hole at the Galactic Centre) Authors: R. Genzel et al. Comments: 5 pages, 3 figures to appear in the Oct 30 issue of Nature Chernaya dyra v centre nashei Galaktiki ochen' "tihaya". Ee aktivnost' yavlyaetsya chrezvychaino nizkoi vo vseh diapazonah spektra. Poetomu, lyuboe novoe obnaruzhennoe proyavlenie yavlyaetsya kraine vazhnym i interesnym. Gruppa avtorov, kotorye uzhe horosho izvestny nashi chitatelyam po ih predydushim rabotam, posvyashennym centru Galaktiki, raportuet ob otkrytii vspyshek v blizhnem infrakrasnom diapazone. Vspyshki nablyudalis' v neposredstvennoi blizosti (neskol'ko millisekund dugi) ot chernoi dyry. U dvuh vspyshek byla otmechena periodichnost' s harakternym vremenem okolo 17 minut. Esli eto svyazano s vrasheniem gaza vokrug chernoi dyry, to my imeem delo s izlucheniem, voznikayushim v neposredstvennoi blizosti ot gorizonta. Krome togo, po etim dannym (esli interpretaciya verna) mozhno skazat', chto chernaya dyra ochen' bystro vrashaetsya. astro-ph/0310823 Vosstanovlenie chisla solnechnyh pyaten na masshtabe tysyacheletiya: ukazanie na neobychnuyu aktivnost' Solnca s 1940-h gg. (A Millennium Scale Sunspot Number Reconstruction: Evidence For an Unusually Active Sun Since the 1940's) Authors: Ilya G. Usoskin et al. Comments: 4 pages, LaTeX, revtex4 macros; Phys. Rev. Let., in press S pomosh'yu raznyh metodik mozhno pytat'sya vosstanovit' dannye o solnechnoi aktivnosti v proshlom. Naprimer, mozhno ispol'zovat' koncentraciyu berilliya-10 v arkticheskom i grenladskom l'dah. Avtory raboty smogli vosstanovit' chislo solnechnyh pyaten do serediny 9 veka. Prodelav eto, avtory zamechayut, chto aktivnost' Solnca v poslednie primerno 60 let byla anomal'no vysokoi. Rekonstrukciya chisla solnechnyh pyaten s pomosh'yu raznyh metodov. dissertaciya gr-qc/0310116 Chislennoe issledovanie relyativistskogo kollapsa (A Numerical Study of Relativistic Fluid Collapse) Authors: Scott C. Noble Comments: 228 pages, 66 Postscript figures, Ph.D. Thesis, the University of Texas at Austin, uses utdiss2.sty v5 Dissertaciya posvyashena chislennomu modelirovaniya gravitacionnogo kollapsa. Tema arhislozhnaya i arhiaktual'naya. astro-ph/0310860 Ukazaniya na sushestvovanie fundamental'nogo predela na massu zvezdy po dannym ob obrazovanii zvezd v skopleniyah (Evidence for a fundamental stellar upper mass limit from clustered star formation) Authors: Carsten Weidner, Pavel Kroupa Comments: MNRAS, accepted, 6 pages Ne nablyudayutsya zvezdy s massoi bolee primerno 150 mass Solnca. Tomu mozhet byt' dva ob'yasneniya: ili est' fundamental'nyi predel, t.e. zvezdy bolee vysokih mass ne obrazuyutsya, ili zhe prosto massivnye zvezdy slishkom redki, chtoby nam moglo povezti uvidet' takogo "zverya". Proanalizirovav dannye nablyudenii, avtory prihodyat k vyvodu o tom, chto predel vse-taki sushestvuet (esli tol'ko s funkciei mass ne proishodit chto-to sovsem udivitel'noe v diapazone samyh tyazhelyh zvezd). polupopulyarno astro-ph/0310911 Vzaimosvyazi mezhdu Bol'shim i Malym (Connections Between Big and Small) Authors: John Ellis Comments: Opening Lecture at the 31st SLAC Summer Institute, July 2003: PSN L01, 19 pages latex, 9 eps figures, uses ssi.sty (included) Eto vvodnaya lekciya, kotoraya prizvana dostatochno populyarno obrisovat' vzaimosvyazi mezhdu fizikoi mikromira i kosmologiei. Na samom dele, eto skoree obzor po kosmologii, gde osoboe vnimanie udeleno problemam, kotorye mogut imet' otnoshenie k mikromiru (temnaya energiya, kosmicheskie luchi sverhvysokih energii i t.p.). Sm. takzhe vtoruyu stat'yu Ellisa "Cosmic Connections". My budem starat'sya hotya by perechislit' interesnye (dlya shirokoi publiki) stat'i, poyavivshiesya v razdele physics (vklyuchaya cross-listing). physics/0310160 Nabrosok plana neitrinnoi observatorii (A design outline for a Cherenkoff neutrino observatory) Authors: E.P. Bonvin, S. T. Hatamian Comments: 15 pages V poslednee vremya problema fiziki neitrino stanovitsya vse bolee populyarnoi. Avtory rassuzhdayut, kak nedorogim sposobom mozhno peredelat' sushestvuyushii detektor, postroennyi dlya poiska raspada protona, v neitrinnuyu observatoriyu. Delo v tom, ustanovka nahodtsya vblizi atomnogo reaktora, chto delaet ee horoshei mishen'yu dlya issledovanii neitrinnyh oscillyacii. Vernut'sya k nachalu stranicy

Publikacii s klyuchevymi slovami: astro-ph - elektronnye preprinty Publikacii so slovami: astro-ph - elektronnye preprinty
Sm. takzhe: Obzory elektronnyh preprintov Astro-Ph Opublikovan ocherednoi obzor preprintov astro-ph Luchshie raboty v astro-ph v 2006 godu Luchshie nablyudatel'nye raboty v astro-ph za 2005 g. Obzory elektronnyh preprintov Astro-Ph za 2002 g. Obzor obzorov astro-ph: luchshee za pervuyu polovinu 2003 g. Obzor obzorov astro-ph: luchshee za vtoruyu polovinu 2003 g. Vse publikacii na tu zhe temu >>