M59-UCD3 | |
---|---|
![]() Images of two ultracompact dwarf galaxies. M59-UCD3 is in the inset to the left, while M85-HCC1 is in the inset to the right. | |
Observation data (J2000 epoch) | |
Constellation | Virgo |
Right ascension | 12h 42m 11.041s[1] |
Declination | +11° 38′ 41.21″[1] |
Heliocentric radial velocity | 373 ± 18[1] |
Apparent magnitude (V) | 16.34 ± 0.05[1] |
Absolute magnitude (V) | −14.60 ± 0.09[1] |
Characteristics | |
Mass | (1.8±0.3)×108[1] M☉ |
Half-light radius (physical) | 20 ± 4 pc[1] |
M59-UCD3 is an ultra-compact dwarf galaxy located near the Messier 59 galaxy. As of 2015[update], it is the second-densest galaxy currently observed, second to M85-HCC1.[1][2]
References
[edit]- ^ a b c d e f g h Sandoval, Michael A.; Vo, Richard P.; Romanowsky, Aaron J.; Strader, Jay; Choi, Jieun; Jennings, Zachary G.; Conroy, Charlie; Brodie, Jean P.; Foster, Caroline; Villaume, Alexa; Norris, Mark A.; Janz, Joachim; Forbes, Duncan A. (23 July 2015). "Hiding in Plain Sight: Record-breaking Compact Stellar Systems in the Sloan Digital Sky Survey". The Astrophysical Journal. 808 (1): L32. arXiv:1506.08828. Bibcode:2015ApJ...808L..32S. doi:10.1088/2041-8205/808/1/L32. S2CID 55254708.
- ^ "Undergraduates discover the densest galaxies known". Space Daily. 29 July 2015.
See also
[edit]