NGC 7468: a galaxy with an inner polar disk

Details NGC 7468: a galaxy with an inner polar disk NGC 7468: a galaxy with an inner polar disk

2004-11-16

arxiv.org/abs/astro-ph/0411457v1

Astron.Astrophys. 30 (2004) 583-592

Astronomy and Astrophysics

Astrophysics

8 pages, 6 figures, accepted in Astronomy Letters, 2004, vol 30., N 9, p. 583

Scientific paper

10.1134/1.1795947

We present our spectroscopic observations of the galaxy NGC 7468 performed at the 6-m Special Astrophysical Observatory telescope using the UAGS long-slit spectrograph, the multipupil fiber spectrograph MPFS, and the scanning Fabry-Perot interferometer (IFP). We found no significant deviations from the circular rotation of the galactic disk in the velocity field in the regions of brightness excess along the major axis of the galaxy (the putative polar ring). Thus, these features are either tidal structures or weakly developed spiral arms. However, we detected a gaseous disk at the center of the galaxy whose rotation plane is almost perpendicular to the plane of the galactic disk. The central collision of NGC 7468 with a gas-rich dwarf galaxy and their subsequent merging seem to be responsible for the formation of this disk.

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