Bibcode
Funes, J. G.; Corsini, E. M.; Cappellari, M.; Pizzella, A.; Vega Beltrán, J. C.; Scarlata, C.; Bertola, F.
Referencia bibliográfica
Astronomy and Astrophysics, v.388, p.50-67 (2002)
Advertised on:
6
2002
Revista
Número de citas
14
Número de citas referidas
11
Descripción
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. Based on observations carried out at European Southern
Observatory (ESO N.58, A-0564), at the Multiple Mirror Telescope, which
is a joint facility of the Smithsonian Institution and the University of
Arizona, and at the Isaac Newton Telescope operated by the Isaac Newton
group at the La Palma island at the Spanish Observatorio del Roque de
los Muchachos of the Instituto de Astrofisica de Canarias.