A fast bar in the post-interaction galaxy NGC 1023

Bibcode
2002MNRAS.332...65D
DOI
10.1046/j.1365-8711.2002.05269.x
Debattista, Victor P.; Corsini, Enrico Maria; Aguerri, J. A. L.
Bibliographical reference

Monthly Notices of the Royal Astronomical Society, Volume 332, Issue 1, pp. 65-77.

Advertised on:
5
2002
Journal
Monthly Notices of the Royal Astronomical Society
Number of authors
3
IAC number of authors
0
Citations
91
Refereed citations
81
Description
We measured the bar pattern speed, Ωp , of the SB0 galaxy NGC 1023 using the Tremaine-Weinberg method with stellar-absorption slit spectroscopy. The morphology and kinematics of the Hi gas outside NGC 1023 suggest it suffered a tidal interaction, sometime in the past, with one of its dwarf companions. At present, however, the optical disc is relaxed. If the disc had been stabilized by a massive dark matter halo and formed its bar in the interaction, then the bar would have to be slow. We found Ωp =5.0+/-1.8kms-1 arcsec-1 , so that the bar ends near its corotation radius. It is therefore rotating rapidly and must have a maximum disc.
Type
Refereed
Galaxies
Photometry

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