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Date and Time of the Query: 2019-06-26 T01:03:51 PDT
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For refcode 2001A&A...374..394V:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2001A&A...374..394V Kinematic properties of gas and stars in 20 disc galaxies J. C. Vega Beltran, A. Pizzella, E. M. Corsini, J. G. Funes S. J., W. W. Zeilinger, J. E. Beckman and F. Bertola Instituto Astrofisico de Canarias, Calle Via Lactea s/n, 38200 La Laguna, Spain Guest investigator of the UK Astronomy Data Centre Osservatorio Astrofisico di Asiago, Dipartimento di Astronomia, Universita di Padova, via dell'Osservatorio 8, 36012 Asiago, Italy Vatican Observatory, University of Arizona, Tucson, AZ 85721, USA Institut fur Astronomie, Universitat Wien, Turkenschanzstrasse 17, 1180 Wien, Austria Dipartimento di Astronomia, Universita di Padova, vicolo dell'Osservatorio 5, 35122 Padova, Italy Received 21 December 2000/Accepted 23 April 2001 Abstract. Ionized gas and stellar kinematical parameters have been measured along the major axis of 20 nearby disc galaxies. We discuss the properties of each sample galaxy, distinguishing between those characterized by regular or peculiar kinematics. In early-type disc galaxies, ionized gas tends to rotate faster than stars and to have a lower velocity dispersion (V_g_ > V_*_ and {sigma}_g_ < {sigma}_*_), whereas in late-type spirals, gas and stars show almost the same rotation velocities and velocity dispersions (V_g_ ~ V_*_ and {sigma}_g_ ~ {sigma}_*_). Incorporating the early-type disc galaxies studied by Bertola et al. (1995), Fisher (1997) and Corsini et al. (1999), we have compiled a sample of some 40 galaxies for which the major-axis radial profiles of both the stellar and gaseous components have been measured. The value of {sigma}_*_ measured at R_e_/4 turns out to be strongly correlated with the galaxy morphological type, while {sigma}_g_ is not and sometimes takes values above the range expected from thermal motions or small-scale turbulence. Key words: galaxies: kinematics and dynamics - galaxies: elliptical and lenticular, cD - galaxies: spiral
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