Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...237l..27d&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 237, Apr. 15, 1980, p. L27-L31.
Astronomy and Astrophysics
Astronomy
66
Astronomical Models, Black Holes (Astronomy), Elliptical Galaxies, Galactic Nuclei, Star Distribution, Anisotropy, Velocity Distribution
Scientific paper
A collisionless distribution of stars with an anisotropic velocity distribution is considered as a model for the cores of spherical galaxies. The first moment of the corresponding Boltzmann equation is integrated to give the resulting density and velocity dispersion profiles. These distributions plus a central point source of light give a good fit to the data from recent observations of M87 without requiring a supermassive central object. This model requires one less fitting parameter than published models incorporating a central black hole. The same model with no point source of light also provides a good fit to the normal E1 galaxy NGC 3379. The success of this model in describing the cores of both M87 and NGC 3379 suggests that a supermassive black hole is not necessary in either.
Duncan Martin J.
Wheeler Justin C.
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