Central Mass Concentration and Bar Dissolution in Nearby Spiral Galaxies

Details Central Mass Concentration and Bar Dissolution in Nearby Spiral Galaxies Central Mass Concentration and Bar Dissolution in Nearby Spiral Galaxies

2002-08-26

arxiv.org/abs/astro-ph/0208467v1

Astrophys.J. 582 (2003) 190-195

Astronomy and Astrophysics

Astrophysics

10 pages, 2 figures and 2 tables, accepted for publication in the Astrophysical Journal

Scientific paper

10.1086/344480

We use data from the BIMA Survey of Nearby Galaxies (SONG) to investigate the relationship between ellipticity and central mass concentration in barred spirals. Existing simulations predict that bar ellipticity decreases as inflowing mass driven by the bar accumulates in the central regions, ultimately destroying the bar. Using the ratio of the bulge mass to the mass within the bar radius as an estimate of the central mass concentration, we obtain dynamical mass estimates from SONG CO 1-0 rotation curve data. We find an inverse correlation between bar ellipticity and central mass concentration, consistent with simulations of bar dissolution.

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