Circular rotation from a simple two-component model of galaxies

Details Circular rotation from a simple two-component model of galaxies Circular rotation from a simple two-component model of galaxies

Apr 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....56..173m&link_type=abstract

Astronomy and Astrophysics, vol. 56, no. 1-2, Apr. 1977, p. 173-180.

Astronomy and Astrophysics

Astrophysics

57

Andromeda Galaxy, Astronomical Models, Galactic Rotation, Luminous Intensity, Mass Distribution, Angular Velocity, Galactic Structure, Power Spectra, Space Density, Spiral Galaxies

Scientific paper

Basic physical parameters are computed for an idealized galaxy consisting of a bulge population whose projected luminosity obeys the 1/4 power of distance law and a disk population obeying an exponential law. The space density of luminosity in the equatorial plane is given along with the circular rotation curve for constant mass-to-light ratios in both components. This method is applied to the galaxies M31 and M81, and the principal result obtained is that the M/L ratio of the bulge populations is rather small.

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