Calibrating the Baryonic Tully-Fisher Relation with Gas Dominated Galaxies

Details Calibrating the Baryonic Tully-Fisher Relation with Gas Dominated Galaxies Calibrating the Baryonic Tully-Fisher Relation with Gas Dominated Galaxies

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dda....40.0705m&link_type=abstract

American Astronomical Society, DDA meeting #40, #7.05; Bulletin of the American Astronomical Society, Vol. 41, p.902

Astronomy and Astrophysics

Astronomy

Scientific paper

We calibrate the Baryonic Tully-Fisher (BTF) Relation using a sample of gas dominated galaxies. These determine the absolute scale of the baryonic mass-rotation speed relation (logM = m logV+b) independent of the choice of stellar mass estimator. We find a BTF slope m = 3.95 +/- 0.05 and intercept b = 1.80 +/- 0.27 for mass in solar masses and velocity in km/s. We apply this relation to estimate the stellar masses of star dominated galaxies. This procedure reproduces the trend of mass-to-light ratio with color predicted by population synthesis models. The normalization is also correct, consistent with empirical estimates of the IMF used in such models.
This work has been supported in part by NSF grant AST 0505956.

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