NGC 4651
NGC 4651 | |
---|---|
![]() NGC 4651. Note the umbrella-shaped stream. | |
Observation data (J2000 epoch) | |
Constellation | Coma Berenices |
Right ascension | 12h 43m 42.6s[1] |
Declination | +16° 23′ 36″[1] |
Redshift | 788 ± 2 km/s[1] |
Distance | 72.0 Mly |
Apparent magnitude (V) | 11.39[1] |
Characteristics | |
Type | SA(rs)c[1] |
Apparent size (V) | 4.0′ × 2.6′[1] |
Other designations | |
UGC 7901,[1] PGC 42833[1] |
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/99/NGC4651-HST-547-R814GB555.jpg/220px-NGC4651-HST-547-R814GB555.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/f6/Feeding_time_%2849730156686%29.jpg/220px-Feeding_time_%2849730156686%29.jpg)
NGC 4651 is a spiral galaxy located in the constellation of Coma Berenices that can be seen with amateur telescopes, at a distance not well determined that ranges from 35 million light years[2] to 72 million light years.[3]
Features
[edit]This member of the Virgo Cluster, located on its outskirts,[4] is known as the Umbrella Galaxy due to the umbrella-shaped structure that extends from its disk to the east and that is composed of stellar streams, being the remnants of a much smaller galaxy that has been torn apart by NGC 4651's tidal forces,[2][5] something that explains why NGC 4651 has been included on Halton Arp's Atlas of Peculiar Galaxies as Arp 189 -galaxy with filaments-.
Studies using radiotelescopes of the distribution of its neutral hydrogen show distortions on NGC 4651's outer regions and a gas clump associated with a dwarf galaxy that may have born in the event that produced the mentioned stellar streams.[6]
Unlike most spiral galaxies of the Virgo Cluster, NGC 4651 is rich in neutral hydrogen, also extending beyond the optical disk,[6] and its star formation is typical for a galaxy of its type.[4]
Two supernovae have been observed in NGC 4651: SN 1987K (type II, mag. 15),[7] and SN 2006my (type II, mag. 15.3).[8]
References
[edit]- ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for NGC 4651. Retrieved 2012-08-04.
- ^ a b Nemiroff, R.; Bonnell, J., eds. (15 April 2010). "NGC 4651: The Umbrella Galaxy". Astronomy Picture of the Day. NASA. Retrieved 2012-08-04.
- ^ Solanes, J. M.; Sanchis, T.; Salvador-Solé, E.; Giovanelli, R.; Haynes, M. P. (2002). "The Three-dimensional Structure of the Virgo Cluster Region from Tully-Fisher and H I Data". The Astronomical Journal. 124 (5): 2440–2452. arXiv:astro-ph/0208147. Bibcode:2002AJ....124.2440S. doi:10.1086/344074. S2CID 116914132.
- ^ a b Koopmann, R.; Kenney, J. D. P. (2004). "Hα Morphologies and Environmental Effects in Virgo Cluster Spiral Galaxies". The Astrophysical Journal. 613 (2): 866–885. arXiv:astro-ph/0406243. Bibcode:2004ApJ...613..866K. doi:10.1086/423191. S2CID 17519217.
- ^ "Stellar Tidal Streams in Spiral Galaxies of the Local Volume". Retrieved 2012-07-21.
- ^ a b Chung, A.; Van Gorkom, J.H.; Kenney, J.F.P.; Crowl, Hugh; Vollmer, B. (2009). "VLA Imaging of Virgo Spirals in Atomic Gas (VIVA). I. The Atlas and the H I Properties". The Astronomical Journal. 138 (6): 1741–1816. Bibcode:2009AJ....138.1741C. doi:10.1088/0004-6256/138/6/1741.
- ^ Transient Name Server entry for SN 1987K. Retrieved 30 March 2023.
- ^ Transient Name Server entry for SN 2006my. Retrieved 30 March 2023.
External links
[edit]Media related to NGC 4651 at Wikimedia Commons