The distribution of dark matter in galaxies. I - Models of spiral galaxies

Details The distribution of dark matter in galaxies. I - Models of spiral galaxies The distribution of dark matter in galaxies. I - Models of spiral galaxies

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....98..166l&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 98, July 1989, p. 166-179. Research supported by the University of Washington.

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59

Astronomical Models, Dark Matter, Mass To Light Ratios, Spatial Distribution, Spiral Galaxies, Astronomical Photometry, Density Distribution, Galactic Rotation

Scientific paper

The distribution of dark matter in galaxies is studied under the assumption of a constant mass-to-light ratio for the luminous components and an isothermal model for the halo. An analysis of 37 optical rotation curves for Sb and Sc galaxies and 16 H-I rotation curves have been performed in order to constrain the halo's core radius, r(c), and the asymptotic velocity, v(max). For the cases of the Scs NGC 2403, NGC 2903, and NGC 3198, limits of about 8 kpc for r(c) and about 170 km/s for v(max) are found. It is shown that high-quality data to 6.5-8 disk scale lengths is necessary to constrain the parameters.

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