The virial mass and mass-to-light ratio of the Andromeda /M31/ subgroup
1979; IOP Publishing; Volume: 232; Linguagem: Inglês
10.1086/157328
ISSN1538-4357
Autores Tópico(s)Stellar, planetary, and galactic studies
Resumoview Abstract Citations (10) References (8) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The virial mass and mass-to-light ratio of the Andromeda (M31) subgroup. Rood, H. J. Abstract The Andromeda subgroup is composed of the galaxies M3l, M32, N205, M33, Nl47, Nl85, and possibly 11613. The virial mass of the Andromeda subgroup obtained with average projection factors is 2.1-2.8 x lOll M0 (the range determined by the adoption of different solar motion corrections), and the mass-to-light ratio is 10-13 solar units. These values are identical to corresponding rotation-curve values for M3 1 out to its last measured point as determined by Bosma. The derived mass and mass-to-light ratio of the subgroup could differ substantially from their true values because of uncertainties due to projection effects, quasi-equilibrium effects, and galactic mass ambiguities. Subject headings: galaxies: clusters of - galaxies: individual - mass-luminosity relation Publication: The Astrophysical Journal Pub Date: September 1979 DOI: 10.1086/157328 Bibcode: 1979ApJ...232..699R Keywords: Andromeda Galaxy; Mass To Light Ratios; Astronomical Catalogs; Equilibrium; Galactic Rotation; Astrophysics; Groups of Galaxies:Mass-Luminosity Relation; Groups of Galaxies:Masses full text sources ADS | data products NED (7)
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