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Virgo I

From Wikipedia, the free encyclopedia

Virgo I
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension12h 00m 09.6s[1]
Declination−00° 40′ 48″[1]
Distance280+42
−26 kly
(87 +13
−8 kpc)[1]
Absolute magnitude (V)−0.8 ± 0.9[1]
Characteristics
TypedSph[1]
Half-light radius (physical)38+12
−11 pc[1]
Half-light radius (apparent)1.5′[1]
Other designations
Virgo I

Virgo I is an extremely faint satellite galaxy of the Milky Way.[2] It was discovered in the Subaru Strategic Survey. Virgo I has an absolute visual magnitude of -0.8 making it one of the least luminous galaxies confirmed thus far. The galaxy has a radius of 124 light years, (half light radius 38 pc) meaning that it is too big to be a globular cluster.[2] Cetus II is dimmer, but too small to be classed as a galaxy.[2] Virgo I is dimmer than Segue I, the previous dimmest known. The distance to Virgo I is 87 kiloparsecs (280,000 ly).[1]

References

  1. ^ a b c d e f g h Homma, Daisuke; Chiba, Masashi; Okamoto, Sakurako; Komiyama, Yutaka; Tanaka, Masayuki; Tanaka, Mikito; Ishigaki, Miho N.; Akiyama, Masayuki; Arimoto, Nobuo; Garmilla, José A.; Lupton, Robert H.; Strauss, Michael A.; Furusawa, Hisanori; Miyazaki, Satoshi; Murayama, Hitoshi; Nishizawa, Atsushi J.; Takada, Masahiro; Usuda, Tomonori; Wang, Shiang-Yu (14 November 2016). "A New Milky Way Satellite Discovered In The Subaru/Hyper Suprime-Cam Survey". The Astrophysical Journal. 832 (1): 21. arXiv:1609.04346. Bibcode:2016ApJ...832...21H. doi:10.3847/0004-637X/832/1/21. S2CID 118700037.
  2. ^ a b c "Record-breaking faint satellite galaxy of the Milky Way discovered". PhysOrg. 22 November 2016. Retrieved 24 November 2016.
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This page was last edited on 21 December 2023, at 21:46
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