Perevod: N.A.Lipunova
Poyasnenie:
Pochemu vokrug nekotoryh staryh zvezd naidena pyl'?
Nablyudeniya, vypolnennye nauchno-issledovatel'skoi gruppoi pod rukovodstvom
George Rieke
na
kosmicheskom teleskope im.Spitcera
(Arizonskii universitet),
imeli svoei cel'yu pokazat', chto
pylevye diski imeyutsya tol'ko u molodyh zvezd
(s vozrastom poryadka 1 mln. let), a u bolee staryh zvezd (ot 10 do 100 mln. let)
takih diskov net.
Gipoteza zaklyuchalas' v tom, chto v
pylevyh diskah vokrug molodyh
zvezd proishodit formirovanie planet, v to vremya kak
u staryh zvezd, u kotoryh uzhe sformirovalis' planetnye sistemy,
pylevye diski rasseyalis'.
Sovershenno neozhidanno u nekotoryh staryh zvezd bylo
naideno izluchenie v
infrakrasnoi oblasti spektra ot
pylevyh kolec ili diskov.
Vozmozhnoe
ob'yasnenie mozhet zaklyuchat'sya v tom, chto
starye diski predstavlyayut soboi ostatki intensivnyh stolknovenii
mezhdu planetami v processe ih obrazovaniya.
Kakimi mogut byt' pylevye kol'ca soglasno etomu scenariyu,
pokazano na
illyustracii
hudozhnika.
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Publikacii s klyuchevymi slovami:
Spitzer space telescope - dust disk - planet formation - pylevoi disk - Formirovanie planet
Publikacii so slovami: Spitzer space telescope - dust disk - planet formation - pylevoi disk - Formirovanie planet | |
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