| NGC 4651 | |
|---|---|
 NGC 4651. Note the umbrella-shaped stream. | |
| Observation data (J2000 epoch) | |
| Constellation | Coma Berenices |
| Right ascension | 12 43 42.6766 |
| Declination | +16° 23′ 36.222″ |
| Redshift | 0.002669 |
| Heliocentric radial velocity | 800 ± 1 km/s |
| Distance | 72.0 Mly |
| Apparent magnitude (V) | 11.39 |
| Characteristics | |
| Type | SA(rs)c |
| Size | ~87,900 ly (26.95 kpc) (estimated) |
| Apparent size (V) | 4.0′ × 2.6′ |
| Other designations | |
| Umbrella Galaxy, IRAS 12412+1639, Arp 189, UGC 7901, MCG +03-33-001, PGC 42833, CGCG 100-004, VV 56 | |
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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 to 72 million light years. It was discovered by German-British astronomer William Herschel on 30 December 1783.
Features
This member of the Virgo Cluster, located on its outskirts, 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, 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.
Unlike most spiral galaxies of the Virgo Cluster, NGC 4651 is rich in neutral hydrogen, also extending beyond the optical disk, and its star formation is typical for a galaxy of its type.
Supernovae
Two supernovae have been observed in NGC 4651:
- SN 1987K (type II, mag. 15) was discovered by Carlton Pennypacker on 28 July 1987.
- SN 2006my (type II, mag. 15.3) was discovered by Kōichi Itagaki on 8 November 2006.
References
- ^ "NASA/IPAC Extragalactic Database". Results for object NGC 4651. Retrieved 2012-08-04.
- ^ 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.
- Seligman, Courtney. "New General Catalogue Objects: NGC 4651". Celestial Atlas. Retrieved 6 December 2024.
- ^ 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.
- ^ 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.
- Pollas, C.; Pennypacker, C. (1987). "Supernovae 1987J and 1987K". International Astronomical Union Circular (4426): 1. Bibcode:1987IAUC.4426....1P.
- "SN 1987K". Transient Name Server. IAU. Retrieved 6 December 2024.
- Nakano, S.; Itagaki, K. (2006). "Supernovae 2006my-2006ne". International Astronomical Union Circular (8773): 1. Bibcode:2006IAUC.8773....1N.
- "SN 2006my". Transient Name Server. IAU. Retrieved 6 December 2024.
External links
Media related to NGC 4651 at Wikimedia Commons
| Astronomical catalogs | |
|---|---|
| NGC | |