Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980pazh....6..398k&link_type=abstract
(Pis'ma v Astronomicheskii Zhurnal, vol. 6, July 1980, p. 398-401.) Soviet Astronomy Letters, vol. 6, July-Aug. 1980, p. 220-222
Astronomy and Astrophysics
Astronomy
2
Galactic Rotation, Galactic Structure, Radial Velocity, Spiral Galaxies, Astronomical Models, Mass Distribution, Spectrographs, Velocity Distribution
Scientific paper
Eight spectrograms are obtained for the spiral galaxy NGC 7541. The rotational curve is determined and used in constructing a three-component model for the mass distribution in the galaxy. The integrated mass is found to be 4.6 x 10 to the 11th solar masses and the ratio of integrated mass to luminosity is found to be approximately 5. In the 5-20 kpc range, the scale of light variation averages 10 kpc, and it is noted that this agrees, within the accuracy of measurement, with the scale of surface-density variation of the disk. It is concluded that in this distance range the mass/luminosity ratio for the star population of the disk does not vary significantly.
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