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Date and Time of the Query: 2019-06-19 T19:57:32 PDT
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For refcode 1990A&A...233..372B:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1990A&A...233..372B The kinematics of the barred spiral galaxy NGC 3059 R. Bottema Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, NL-9700 AV Groningen, The Netherlands Received July 12, accepted December 8, 1989 Abstract. Stellar and H{beta} emission line radial velocities and stellar velocity dispersion measurements of the bar of the face-on SBc spiral galaxy NGC 3059 are presented. Along the major axis of the bar the radial velocities are constant, but going in a direction perpendicular to the bar from one side to the other, there is a substantial velocity increment of 70 km s^-1^. Assuming that the systematic motions are confined to the plane of the galaxy, this jump can be explained by a stellar streaming of about 100 km s^-1^ along the bar, as predicted by numerical studies. The emission line radial velocities generally follow the stellar velocities with some small scale deviations. The stellar velocity dispersion is essentially constant at a level of 53 km s^-1^ in the bar, and drops steeply outside. Comparison with z-direction bar dispersions of other galaxies shows that this value is considerably lower than the average value of ~140 km s^-1^ for SB0 galaxy bars. Key words: galaxies: barred - kinematics and dynamics - structure of galaxies - NGC 3059
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