Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...257...69b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 257, no. 1, p. 69-84.
Astronomy and Astrophysics
Astrophysics
19
Spiral Galaxies, Stellar Motions, Absorption Spectra, Astronomical Photometry, Emission Spectra, Galactic Bulge, Galactic Structure, Radial Velocity, Velocity Distribution
Scientific paper
Observations based on long slit absorption line spectroscopy of Sb galaxy NGC 2815 and Sc galaxy NGC 1566 were used to determine stellar radial velocities and stellar velocity dispersions as a function of radius. Observations of random stellar motions of these galaxies are presented and discussed. Avialable photometry data was used to relate the mass distribution following from the velocity dispersions to the light. The mass-to-light ratio determined from the velocity dispersions was compared with the value obtained from the amount of rotation. A radially decreasing velocity dispersion was observed for NGC 1566. For NGC 2815 observed stellar velocity dispersion was compared with the results of the model calculation.
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