| NGC 4839 | |
|---|---|
 The cD galaxy NGC 4839. | |
| Observation data (J2000 epoch) | |
| Constellation | Coma Berenices |
| Right ascension | 12 57 24.361 |
| Declination | +27° 29′ 52.14″ |
| Redshift | 0.02448 |
| Heliocentric radial velocity | 7913 km/s |
| Distance | 380.7 Mly (116.71 Mpc) |
| Apparent magnitude (B) | 13.02 |
| Characteristics | |
| Type | cD |
| Other designations | |
| 2MASX J12572435+2729517, UGC 8070, MCG -05-31-025, PGC 44298, CGCG 160-039 | |
NGC 4839 is a type-cD galaxy located within the rich Coma cluster of galaxies. The galaxy is part of the NGC 4839 galaxy group of which it is the brightest galaxy.
The NGC 4839 group appears to be merging with the Coma cluster. However it is unclear if the group is on its initial infall or if it has passed through the cluster once already. A 2023 paper argued that the distribution of globular clusters within the galaxy supported the galaxy being on its second infall.
NGC 4839 was discovered on April 11, 1785, by William Herschel, but also observed by John Herschel on April 19, 1827, and by Heinrich d'Arrest on May 18, 1862. It is classified as a radio galaxy presenting radio waves.
References
- ^ "Results for object NGC 4839 (NGC 4839)". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 25 May 2023.
- ^ "NGC 4839". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 27 May 2023.
- ^ Oh, Seong-A; Lee, Myung Gyoon; Jang, In Sung (13 February 2023). "Globular Clusters in NGC 4839 Falling into Coma: Evidence for the Second Infall?". The Astrophysical Journal. 944 (1). arXiv:2301.05269. doi:10.3847/1538-4357/acb1b1.
- "New General Catalog Objects: NGC 4800 - 4849". cseligman.com. Retrieved 2024-04-28.
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