Departures From Axisymmetric Morphology and Dynamics in Spiral Galaxies

Details Departures From Axisymmetric Morphology and Dynamics in Spiral Galaxies Departures From Axisymmetric Morphology and Dynamics in Spiral Galaxies

2000-04-07

arxiv.org/abs/astro-ph/0004113v1

Astronomy and Astrophysics

Astrophysics

24 pages, 19 figures, AASTeX, accepted for publication in AJ, postscript figures available at ftp://culebra.tn.cornell.edu/p

Scientific paper

10.1086/301422

New HI synthesis data have been obtained for six face-on galaxies with the Very Large Array. These data and reanalyses of three additional data sets make up a sample of nine face-on galaxies analyzed for deviations from axisymmetry in morphology and dynamics. This sample represents a subsample of galaxies already analyzed for morphological symmetry properties in the R-band. Four quantitative measures of dynamical nonaxisymmetry are compared to one another and to the quantitative measures of morphological asymmetry in HI and R-band to investigate the relationships between nonaxisymmetric morphology and dynamics. We find no significant relationship between asymmetric morphology and most of the dynamical measures in our sample. A possible relationship is found, however, between morphology and dynamical position angle differences between approaching and receding sides of the galaxy.

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