Velocity dispersions of disk stars in spiral galaxies

Details Velocity dispersions of disk stars in spiral galaxies Velocity dispersions of disk stars in spiral galaxies

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...284l..35b&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 284, Sept. 15, 1984, p. L35-L38.

Astronomy and Astrophysics

Astrophysics

19

Disk Galaxies, Spiral Galaxies, Stellar Motions, Velocity Distribution, Astronomical Photometry, Galactic Structure, Mass Distribution

Scientific paper

For multicomponent spiral disks, the authors derive a relation for individual stellar components between the total surface density of mass and the observed luminosity scale height and vertical velocity dispersion. A criterion is given for the validity of the relation in the presence of spheroidal mass distributions and an inhomogeneous disk. Mass models for the Milky Way and NGC 891, 4565, and 5907 are used to illustrate what velocity dispersions observers might expect to measure in nearly face-on spiral galaxies.

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