Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21431101e&link_type=abstract
American Astronomical Society, AAS Meeting #214, #311.01; Bulletin of the American Astronomical Society, Vol. 41, p.746
Astronomy and Astrophysics
Astronomy
Scientific paper
I present an analysis of how the fraction of galaxies with bars depends on galaxy properties, using the optical bar classifications of the RC3 catalog and data from the literature. The most striking result is a strong anti-correlation between bars and galaxy mass: the more massive a galaxy is, the less likely it is to host a bar. The trend is strongest when rotation velocity is used, which suggests that the halo mass might be the most important factor. For example, almost 90% of early-type spirals with Vrot < 150 km/s are barred; but the fraction drops to 40% by the time Vrot > 300 km/s. Bar fractions are systematically lower for S0 galaxies, even when the mass dependence is taken into account. I find no dependence of bar fraction on gas mass fraction, which may put constraints on models where high gas fractions are either necessary for bar persistence, or enhance bar weakening and destruction.
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