Local Elliptical Galaxies: Some Aspects of Theory vs. Observations

Details Local Elliptical Galaxies: Some Aspects of Theory vs. Observations Local Elliptical Galaxies: Some Aspects of Theory vs. Observations

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007seraj.175....7s&link_type=abstract

Serbian Astronomical Journal, vol. 175, p. 7-13

Mathematics

Logic

Galaxies: Kinematics And Dynamics, Galaxies: Elliptical And Lenticular Cd, Galaxies: Structure, Dark Matter

Scientific paper

In this paper we analyse on, the sample of the local elliptical galaxies, some predictions of various cosmological theories. We start with the sample of ellipticals described in Samurović (2007b) and confront the established concentration parameters and mass-to-light ratios of these objects with various cosmological models, i.e. models given by Navarro, Frank and White (NFW) (1996, 1997) and Burkert (1995), respectively. We find that the bright galaxy (NGC~5846), for which the sum α+β is high, can be reasonably modelled by the NFW models. The Burkert model provides rather good predictions of the dark matter content at one effective radius. There is an indication that bright ellipticals (MB≲ -21.0) are more dark matter dominated that the fainter ones (MB > -21.0).

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