Volume 382, Number 2, FebruaryI 2002
|Page(s)||488 - 494|
|Section||Cosmology (including clusters of galaxies)|
|Published online||15 February 2002|
The orthogonal gaseous kinematical decoupling in the Sa spiral NGC 2855 *,**
Osservatorio Astrofisico di Asiago, Dipartimento di Astronomia, Università di Padova, via dell'Osservatorio 8, 36012 Asiago, Italy
2 Dipartimento di Astronomia, Università di Padova, vicolo dell'Osservatorio 2, 35122 Padova, Italy
Corresponding author: E. M. Corsini, email@example.com
Accepted: 25 October 2001
We present major and minor-axis kinematics of stars and ionized gas as well as narrow and broad-band surface photometry of the Sa spiral NGC 2855. In the nuclear regions of this unbarred and apparently undisturbed spiral galaxy the gas is rotating perpendicularly to the galaxy disk. We suggest that this kinematically-decoupled component is the signature of an acquisition process in the history of this galaxy.
Key words: galaxies: individual: NGC 2855 / galaxies: kinematics and dynamics / galaxies: spiral / galaxies: formation / galaxies: structure
Based on observations carried out at the Observatorio del Roque de los Muchachos, La Palma (Spain) with the Italian Telescopio Nazionale Galileo and at the European Southern Observatory, La Silla (Chile) (ESO 62.N-0463 and 67.B-0230).
© ESO, 2002
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