Galactic models with massive coronae. III - Giant elliptical galaxy M 87

Details Galactic models with massive coronae. III - Giant elliptical galaxy M 87 Galactic models with massive coronae. III - Giant elliptical galaxy M 87

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...248..395t&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 248, no. 2, Aug. 1991, p. 395-403.

Astronomy and Astrophysics

Astrophysics

8

Astronomical Models, Elliptical Galaxies, Galactic Bulge, Galactic Structure, Astronomical Photometry, Galactic Nuclei, Globular Clusters, Mass To Light Ratios

Scientific paper

A model of the giant elliptical galaxy M 87 is calculated using a previously proposed algorithm. All available observational data on surface photometry from the U to K bands, stellar velocity dispersions, distribution of globular clusters and their velocity dispersion, as well as the distribution of X-rays have been collected. These data were used to decompose the galaxy into a central nucleus, a metal-rich bulge, a metal-poor halo, and a massive dark corona. The structural parameters, color indices and mass-to-light ratios of these populations are derived. The gravitational potential and mass distribution functions of M 87 and subsystems are found. Problems concerning the possible presence of a massive black hole in the center of the galaxy and the mass of the metal-poor halo are discussed. The mass-to-luminosity ratio of optically visible parts of the galaxy is 4.9 +/- 2.0 solar masses/solar luminosities, and the ratio of the total mass to a visible mass of 130 inside the radius of 90 arcmin.

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