Astronomy:NGC 4839
From HandWiki
| NGC 4839 | |
|---|---|
| File:250px The cD galaxy NGC 4839. | |
| Observation data (J2000 epoch) | |
| Constellation | Coma Berenices |
| Right ascension | 12h 57m 24.361s |
| Declination | +27° 29′ 52.14″ |
| Redshift | 0.02448 |
| Helio radial velocity | 7913 km/s |
| Distance | 380.7 Mly (116.71 Mpc)[1] |
| Apparent magnitude (B) | 13.02 [2] |
| Characteristics | |
| Type | cD; SA0[1] |
| Size | 350,000 ly (107.36 kpc) (estimated)[1] |
| Other designations | |
| UGC 8070, MCG-05-31-025, PGC 44298[2] | |
NGC 4839 is a lenticular type-cD galaxy located within the rich Coma Cluster of galaxies.[1] The galaxy is part of the NGC 4839 galaxy group of which it is the brightest galaxy.[3]
The NGC 4839 group appears to be merging with the Coma cluster.[3] However it is unclear if the group is on its initial infall or if it has passed through the cluster once already.[3] A 2023 paper argued that the distribution of globular clusters within the galaxy supported the galaxy being on its second infall.[3]
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.[4] It is classified as a radio galaxy presenting radio waves.[1]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 "Results for object NGC 4839 (NGC 4839)". NASA/IPAC Extragalactic Database. California Institute of Technology. https://ned.ipac.caltech.edu/byname?objname=NGC%204839&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1.
- ↑ 2.0 2.1 "NGC 4839". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+4839.
- ↑ 3.0 3.1 3.2 3.3 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): 51. doi:10.3847/1538-4357/acb1b1. Bibcode: 2023ApJ...944...51O.
- ↑ "New General Catalog Objects: NGC 4800 - 4849". https://cseligman.com/text/atlas/ngc48.htm#4839.
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