Mass-to-light ratio of elliptical galaxies

Details Mass-to-light ratio of elliptical galaxies Mass-to-light ratio of elliptical galaxies

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...152..315b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 152, no. 2, Nov. 1985, p. 315-324.

Astronomy and Astrophysics

Astrophysics

31

Elliptical Galaxies, Mass To Light Ratios, Astronomical Photometry, Luminosity, Stellar Rotation, Tables (Data), Virial Theorem

Scientific paper

Two virial formulas, which take into account the observed flattening, are established for oblate ellipticals obeying the r to the 1/4th power law and used to derive the mean mass to light ratios in their central part. One of them, which requires the knowledge of only one kinematical parameter, the central (stellar) velocity dispersion, is applied to 197 ellipticals. The other one, which uses in addition the maximum stellar rotation velocity, is shown to be less sensitive to the unknown true flattenings and to possible velocity anisotropies. It is applied to 30 ellipticals. Both methods give a mean blue mass to luminosity ratio of about 13, without any clear correlation with the absolute luminosity of the galaxy.

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