ANKa Dnya
Astronomicheskaya Nauchnaya Kartinka Dnya
<< Predydushaya | 4.09.2003 | Sleduyushaya >> |
Gravitacionnye linzy po dannym proekta GOODS
iz raboty Fassnaht i dr. (C. D. Fassnacht et al.)
astro-ph/0309060
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 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 nachala sentyabrya v Arhive aktivno stali poyavlyat'sya pervye
rezul'taty:
astro-ph/0309071,
astro-ph/0309070,
astro-ph/0309068,
astro-ph/0309067,
astro-ph/0309060,
astro-ph/0309049,
astro-ph/0309039.
V stat'e, o kotoroi poidet rech' nizhe, ispol'zovany dannye Kosmicheskogo
teleskopa, poluchennye v ramkah programmy GOODS, dlya izucheniya dalekih
gravitacionnyh linz.
Na risunke pokazany shest' kandidatov v linzy. Privedeny dannye v opticheskom (polosy B i V) i blizhnem IK diapazonah (435, 606 i 775 nm). Razmery kvadratov ot 3 do 7 uglovyh sekund. Vse galaktiki eto dalekie (0.4<z<1) slabye (zv. velichina v polose B poryadka 23-25) ob'ekty.
Kandidaty byli vydeleny iz ogromnoi vyborki v 1092 galaktiki. Dlya vydeleniya linzirovannyh galaktik avtoram prishlos' primenyat' neprostuyu orignal'nuyu metodiku (o nei mozhno prochest' v samoi stat'e). Krome privedennyh shesti est' eshe bolee soroka horoshih kandidatov v linzy. Oni budut issledovat'sya v dal'neishem.