Astronomy:UGC 4879
From HandWiki
Short description: Dwarf Galaxy at the periphery of the Local Group
| 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] |
| Helio 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] | |
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.
Appearance
UGC 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
There are about 2.3 million light years between UGC 4879 and its closest neighbour, Leo A.[5]
References
- ↑ 1.0 1.1 Adelman-McCarthy, J. K. (2009). "VizieR Online Data Catalog: The SDSS Photometric Catalog, Release 7". VizieR On-line Data Catalog. Bibcode: 2009yCat.2294....0A.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 "NED results for object UGC 4879". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=UGC+4879&extend=no&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES. Retrieved 19 February 2017.
- ↑ 3.0 3.1 3.2 "UGC 4879". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=UGC+4879.
- ↑ 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. doi:10.1111/j.1745-3933.2008.00482.x. Bibcode: 2008MNRAS.387L..45K.
- ↑ "A mysterious hermit". http://www.spacetelescope.org/images/potw1623a/. Retrieved 8 June 2016.
External links
 |  |
