The Orthogonal Gaseous Kinematical Decoupling in the Sa Spiral NGC 2855

Details The Orthogonal Gaseous Kinematical Decoupling in the Sa Spiral NGC 2855 The Orthogonal Gaseous Kinematical Decoupling in the Sa Spiral NGC 2855

2001-10-28

arxiv.org/abs/astro-ph/0110592v2

Astronomy and Astrophysics

Astrophysics

7 pages, 4 PostScript figures. Accepted for pubblication in A&A. Figs. 1 and 3 at lower resolution. Data tables will be availa

Scientific paper

10.1051/0004-6361:20011647

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.

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