Bibcode
Pignatelli, E.; Vega Beltrán, J. C.; Beckman, J. E.; Corsini, E. M.; Pizzella, A.; Scarlata, C.; Bertola, F.; Funes, J. G.; Zeilinger, W. W.
Bibliographical reference
Astrophysics and Space Science Supplement, v. 277, p. 493-493 (2001).
Advertised on:
2001
Citations
0
Refereed citations
0
Description
We present V-band surface photometry and major-axis kinematics of stars
and ionized gas of three early-type spiral galaxies, namely NGC 772, NGC
3898 and NGC 7782. For each galaxy we built a self-consistent Jeans
model for the stellar kinematics, adopting the light distribution of
bulge and disc derived by means of a two-dimensional parametric
photometric decomposition. This allowed us to investigate the presence
of non-circular gas motions, and derive the mass distribution of
luminous and dark matter in these objects. We found that the observed
gas rotation corresponds to the circular velocity except for the
innermost region (|r|<8") of NGC 3898. This behaviour is quite
common, although not ubiquitous, in the few bulge-dominated galaxies,
for which dynamical modeling allows the comparison between the gas
velocity and the circular speed.