Modeling gas and stellar kinematics in disc galaxies

Bibcode
2001ApSSS.277..493P
DOI
10.1023/A:1012758729499
Pignatelli, E.; Vega Beltrán, J. C.; Beckman, J. E.; Corsini, E. M.; Pizzella, A.; Scarlata, C.; Bertola, F.; Funes, J. G.; Zeilinger, W. W.
Referencia bibliográfica

Astrophysics and Space Science Supplement, v. 277, p. 493-493 (2001).

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2001
Número de autores
9
Número de autores del IAC
2
Número de citas
0
Número de citas referidas
0
Descripción
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.
Tipo
Sin árbitro

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