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Title:
The orthogonal gaseous kinematical decoupling in the Sa spiral NGC 2855
Authors:
Corsini, E. M.; Pizzella, A.; Bertola, F.
Affiliation:
AA( Osservatorio Astrofisico di Asiago, Dipartimento di Astronomia, Universitàdi Padova, via dell'Osservatorio 8, 36012 Asiago, Italy), AB(Dipartimento di Astronomia, Universitàdi Padova, vicolo dell'Osservatorio 2, 35122 Padova, Italy), AC(Dipartimento di Astronomia, Universitàdi Padova, vicolo dell'Osservatorio 2, 35122 Padova, Italy)
Publication:
Astronomy and Astrophysics, v.382, p.488-494 (2002) (A&A Homepage)
Publication Date:
02/2002
Origin:
A&A
A&A Keywords:
GALAXIES: INDIVIDUAL: NGC 2855, GALAXIES: KINEMATICS AND DYNAMICS, GALAXIES: SPIRAL, GALAXIES: FORMATION, GALAXIES: STRUCTURE
DOI:
10.1051/0004-6361:20011647
Bibliographic Code:
2002A&A...382..488C

Abstract

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. 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). Tables 3 and 4 are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/382/488

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