Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....91.1301k&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 91, June 1986, p. 1301-1327.
Astronomy and Astrophysics
Astrophysics
302
Brightness Distribution, Galactic Structure, Missing Mass (Astrophysics), Spectral Energy Distribution, Spiral Galaxies, Visible Spectrum, Astronomical Models, Charge Coupled Devices, Mass Distribution, Mass To Light Ratios, Tables (Data)
Scientific paper
Data obtained with a CCD camera are presented for 37 Sb and Sc galaxies with existing optical rotation curves. The CCD images are used to derive luminosity profiles using standard reduction methods, and multicolor images are obtained for several galaxies in order to investigate the effects of color gradients. A new method for decomposing the profiles into bulge and disk components is presented. It is found that optical rotation curves do not always place strong constraints on the amount of dark matter in galaxies. Three methods of constraining the halo or bulge/disk parameters are presented. The stellar M/L ratio is shown to correlate with galaxy mass, morphological type, and inclination.
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