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Date and Time of the Query: 2019-08-18 T13:09:12 PDT
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For refcode 2002A&A...388...50F:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2002A&A...388...50F Position-velocity diagrams of ionized gas in the inner regions of disk galaxies J. G. Funes, S. J., E. M. Corsini, M. Cappellari, A. Pizzella, J. C. Vega Beltran, C. Scarlata, and F. Bertola Vatican Observatory, University of Arizona, Tucson, AZ 85721, USA Osservatorio Astrofisico di Asiago, Dipartimento di Astronomia, Universita di Padova, via dell'Osservatorio 8, 36012 Asiago, Italy Leiden Observatory, Postbus 9513, 2300 RA Leiden, The Netherlands Dipartimento di Astronomia, Universita di Padova, vicolo dell'Osservatorio 2, 35122 Padova, Italy Instituto Astrofisico de Canarias, Calle Via Lactea s/n, 38200 La Laguna, Spain Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218, USA Received 12 December 2001/Accepted 18 March 2002 Abstract. We use long-slit spectroscopy along the major axis of a sample of 23 nearby disk galaxies to study the kinematic properties of the ionized-gas component in their inner regions. For each galaxy, we derive the position-velocity diagram of the ionized gas from its emission lines. We discuss the variety of shapes observed in such position-velocity diagrams by comparing the gas velocity gradient, velocity dispersion and integrated flux measured in the inner (r ~ +/- 1") and outer regions (r ~ +/-4"). This kind of analysis allows the identification of galaxies which are good candidates to host a circumnuclear Keplerian gaseous disk rotating around a central mass concentration, and to follow up with Hubble Space Telescope observations. Key words: galaxies: kinematics and dynamics - galaxies: ISM - galaxies: spiral - galaxies: structure - galaxies: nuclei - black hole physics
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