Rotation curves and masses of galaxies

Details Rotation curves and masses of galaxies Rotation curves and masses of galaxies

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...125..394l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 125, no. 2, Sept. 1983, p. 394, 395.

Astronomy and Astrophysics

Astrophysics

71

Galactic Nuclei, Galactic Rotation, Spiral Galaxies, Angular Velocity, Astronomical Models, Mass

Scientific paper

The determination of the mass M(R) of a spiral galaxy interior to a particular radius R where the rotation velocity has been measured is discussed. It is shown that in spiral galaxies M(R) is almost certainly in the range (0.6 to 1.0)RV-squared(R)/G. This estimate is attained using models where inside R the rotation velocity increases linearly towards some radius and then stays flat until R. Outside R, either a flat rotation curve or a Keplerian curve is assumed. The obtained value might be the most appropriate at all radii in the case of galaxies with a massive halo.

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