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
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]

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.
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