GALAXIES

Mass models from near-infrared surface photometry

Ph. Héraudeau (1), F. Simien (1), and G.A. Mamon (2)
(1) Observatoire de Lyon, F-69561 Saint-Genis-Laval cedex, France
(2) Institut d'Astrophysique, 98 bis boulevard Arago, F-75014 Paris, France

Abstract

We analyze the surface-brightness distribution of six inclined Sa-Sc galaxies in terms of bulge, axisymmetric-disk, and spiral-arm components. The data are K'-band frames completed, in the outer parts of the galaxies, by I-band surface photometry. The derived mass models are used to calculate circular-rotation curves which, compared to observed gas kinematics, set constraints on the mass-to-light ratios.

Text of the article (compressed PostScript file)

Last revised: 11-nov-1995, PhP prugniel@obs.univ-lyon1.fr