Sekstant (sazvežđe)
(preusmereno sa Сазвежђе Секстант)
| Sazvežđe | |
 | |
| Latinsko ime | Sextans |
|---|---|
| Skraćenica | Sex |
| Genitiv | Sextantis |
| Simbolizuje | Sekstant |
| Rektascenzija | 10 |
| Deklinacija | 0 |
| Površina | 314 sq. deg. (47) |
| Najsjajnija zvezda | α Sex (4,49m) |
| Meteorski rojevi | nema |
| Vidljivo u rasponu +80°° i −80°°. U najboljem položaju za posmatranje u 21:00 čas u aprilu. | |
Sekstant (lat. Sextans), je jedno od 88 modernih sazvežđa. Manja konstelacija pozicionirana u visini nebeskog ekvatora koju je uveo astronom Johanes Hevelije.
Značajne karakteristike[uredi | uredi izvor]
Sektans B je prilično svetla patuljasta nepravilna galaksija magnitude 6,6, na udaljenosti od 4,3 miliona svetlosnih godina od Zemlje. Deo je Lokalne grupe galaksija.[1]
CL J1001+0220 je od 2016. godine najudaljenije poznato jato galaksija na crvenom pomaku z = 2,506, 11,1 milijardi svetlosnih godina od Zemlje.[2]
U junu 2015, astronomi su izvestili o dokazima za zvezde populacije III u galaksiji Kosmos crveni pomak 7 (na z = 6,60) pronađene u Sekstans. Takve zvezde su verovatno postojale u vrlo ranom svemiru (tj. sa velikim crvenim pomakom) i možda su započele proizvodnju hemijskih elemenata težih od vodonika koji su potrebni za kasnije formiranje planeta i života kakvog poznajemo.[3][4]
Reference[uredi | uredi izvor]
- ^ Levy 2005, str. 178. sfn greška: više ciljeva (2×): CITEREFLevy2005 (help)
- ^ Wang, Tao; Elbaz, David; Daddi, Emanuele; Finoguenov, Alexis; Liu, Daizhong; Schrieber, Corenin; Martin, Sergio; Strazzullo, Veronica; Valentino, Francesco; van Der Burg, Remco; Zanella, Anita; Cisela, Laure; Gobat, Raphael; Le Brun, Amandine; Pannella, Maurilio; Sargent, Mark; Shu, Xinwen; Tan, Qinghua; Cappelluti, Nico; Li, Xanxia (2016). „Discovery of a galaxy cluster with a violently starbursting core at z=2.506”. The Astrophysical Journal. 828 (1). Bibcode:2016ApJ...828...56W. arXiv:1604.07404
. doi:10.3847/0004-637X/828/1/56.
- ^ Sobral, David; Matthee, Jorryt; Darvish, Behnam; Schaerer, Daniel; Mobasher, Bahram; Röttgering, Huub J. A.; Santos, Sérgio; Hemmati, Shoubaneh (4. 6. 2015). „Evidence For POPIII-Like Stellar Populations In The Most Luminous LYMAN-α Emitters At The Epoch Of Re-Ionisation: Spectroscopic Confirmation”. The Astrophysical Journal. 808: 139. Bibcode:2015ApJ...808..139S. arXiv:1504.01734 . doi:10.1088/0004-637x/808/2/139.
- ^ Overbye, Dennis (17. 6. 2015). „Astronomers Report Finding Earliest Stars That Enriched Cosmos”. New York Times. Pristupljeno 17. 6. 2015.
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- „SV Leonis Minoris – Variable Star of RS CVn type”. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pristupljeno 20. 10. 2012.
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- „RY Leonis Minoris – Pulsating White Dwarf”. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Pristupljeno 22. 10. 2012.
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