UGC 4879, which is also known as VV 124, is the most isolated dwarf galaxy in the periphery of the Local Group. It is an irregular galaxy at a distance of 1.38 Mpc. Low-resolution spectroscopy yielded inconsistent radial velocities for different components of the galaxy, hinting at the presence of a stellar disk. There is also evidence of this galaxy containing dark matter.
| UGC 4879 | |
|---|---|
 UGC 4879, taken using the Hubble Space Telescope's Advanced Camera for Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 09h 16m 02.023s[1] |
| Declination | +52° 50′ 42.05″[1] |
| Redshift | −0.000233[2] |
| Heliocentric radial velocity | −70[2] |
| Distance | 4.18 ± 0.41 Mly (1.283 ± 0.126 Mpc)[2] |
| Group or cluster | Local Group |
| Apparent magnitude (V) | 13.2[3] |
| Apparent magnitude (B) | 14.0[3] |
| Characteristics | |
| Type | IAm[2] |
| Size | 3,000 ly (930 pc)[2] |
| Apparent size (V) | 2.5′ × 1.5′[2] |
| Notable features | Isolated dwarf galaxy in the Local Group |
| Other designations | |
| VV 124, MGC+09-15-113, PGC 26142[3] | |
Appearance
editUGC 4879 is a transition type galaxy, meaning it has no rings (Denoted rs). It is also a spheroidal (dSph) galaxy, meaning it has a low luminosity. It has little to no gas or dust, and little recent star formation. It is also irregular, meaning it has no specific form.[4]
Gallery
edit![There are about 2.3 million light years between UGC 4879 and its closest neighbour, Leo A.[5]](/wiki/File:A_mysterious_hermit.jpg)
References
edit- ^ a b Adelman-McCarthy, J. K.; et al. (2009). "VizieR Online Data Catalog: The SDSS Photometric Catalog, Release 7". VizieR On-line Data Catalog. Bibcode:2009yCat.2294....0A.
- ^ a b c d e f "NED results for object UGC 4879". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 19 February 2017.
- ^ a b c "UGC 4879". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 19 February 2017.
- ^ Kopylov, A. I.; Tikhonov, N. A.; Fabrika, S.; Drozdovsky, I.; Valeev, A. F. (2008). "VV124 (UGC4879): A new transitional dwarf galaxy in the periphery of the Local Group". Monthly Notices of the Royal Astronomical Society: Letters. 387 (1): L45–L49. arXiv:0803.1107. Bibcode:2008MNRAS.387L..45K. doi:10.1111/j.1745-3933.2008.00482.x. S2CID 17166212.
- ^ "A mysterious hermit". Retrieved 8 June 2016.
External links
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Wikimedia Commons has media related to UGC 4879.
