UGC 4879

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)
ConstellationUrsa Major
Right ascension09h 16m 02.023s[1]
Declination+52° 50′ 42.05″[1]
Redshift-0.000233[2]
Heliocentric radial velocity-70[2]
Distance4.18 ± 0.41 Mly (1.283 ± 0.126 Mpc)[2]
Group or clusterLocal Group
Apparent magnitude (V)13.2[3]
Apparent magnitude (B)14.0[3]
Characteristics
TypeIAm[2]
Size3,000 ly (930 pc)[2]
Apparent size (V)2.5′ × 1.5′[2]
Notable featuresIsolated dwarf galaxy in the Local Group
Other designations
VV 124, MGC+09-15-113, PGC 26142[3]

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]

  • There are about 2.3 million light years between UGC 4879 and its closest neighbour, Leo A.
    There are about 2.3 million light years between UGC 4879 and its closest neighbour, Leo A.[5]

References
  1. 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.
  2. "NED results for object UGC 4879". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 19 February 2017.
  3. "UGC 4879". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 19 February 2017.
  4. 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.
  5. "A mysterious hermit". Retrieved 8 June 2016.
Wikimedia Commons has media related to UGC 4879.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.