Title: Estimating the masses of galaxy groups - Alternatives to the virial theorem
Abstract: view Abstract Citations (348) References (19) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Estimating the masses of galaxy groups: alternatives to the virial theorem. Heisler, J. ; Tremaine, S. ; Bahcall, J. N. Abstract The authors present three alternatives to the virial theorem for estimating the masses of groups of galaxies. The projected mass estimator uses the mean value of Vi2|Ri|, where Vi and Riare the radial velocity and projected separation of galaxy i from the group center. The other two methods rely on the average and median of (Vi-Vj)2|Ri-Rj| over all pairs of galaxies in the group. These three estimators and the virial theorem estimator are tested using a series of N-body simulations and Monte Carlo realizations of Michie models. The authors use the mass estimators to calculate the masses and mass-to-light ratios of nearby groups catalogued by Huchra and Geller. The results confirm their work, implying that there is a large amount of dark mass in groups on scales of ≡700 kpc. Publication: The Astrophysical Journal Pub Date: November 1985 DOI: 10.1086/163584 Bibcode: 1985ApJ...298....8H Keywords: Astronomical Models; Galactic Clusters; Mass; Virial Theorem; Many Body Problem; Monte Carlo Method; Astrophysics full text sources ADS |
Publication Year: 1985
Publication Date: 1985-11-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 230
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