NGC 2217, a case of apparent counterrotation

Details NGC 2217, a case of apparent counterrotation NGC 2217, a case of apparent counterrotation

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj.....99.1789b&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 99, June 1990, p. 1789-1797, 2161. Research supported by MPI.

Astronomy and Astrophysics

Astronomy

24

Astronomical Photometry, Astronomical Spectroscopy, Barred Galaxies, Counter Rotation, Galactic Rotation, Absorption Spectra, Charge Coupled Devices, Luminosity, Stellar Rotation, Stellar Structure

Scientific paper

Spectroscopic and photometric observations of SB0 NGC 2217 are presented, showing the phenomenon of counterrotation. A simple model of a warped and twisted gas disk is used to show that the counterrotation observed is probably caused by a projection effect. The integrated bar luminosity is estimated to be between 5 and 10 percent of the total galaxy luminosity. Estimates for the tumbling velocity of the bar are compared with various bar models.

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