Bar Parameters From Halpha Observations: Tremaine-Weinberg method with Halpha velocity fields

Details Bar Parameters From Halpha Observations: Tremaine-Weinberg method with Halpha velocity fields Bar Parameters From Halpha Observations: Tremaine-Weinberg method with Halpha velocity fields

2004-07-07

arxiv.org/abs/astro-ph/0407152v1

Astronomy and Astrophysics

Astrophysics

2 pages, 3 figures, to be published in "BARS 2004, Penetrating Bars Through Masks of Cosmic Dust" proceeding

Scientific paper

The very first results of the application of the Tremaine-Weinberg (hereafter TW) method on Halpha velocity fields are presented to find pattern speeds of galaxies. The technique is used for a sample of four barred galaxies(NGC4321, NGC3359, NGC6946 and NGC2903) and M51. For two of these, our results are very similar to those obtained using the same technique but based on CO observations. For the three other galaxies, a comparison is provided between this observational method and numerical ones.

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