2009/05/31 by David V. Stark, Stacy. S. McGaugh, Robert. A. Swaters · 1 citation
Physics and Astronomy · #astro-ph.CO
paper · pdf · doi:10.1088/0004-6256/138/2/392
published as The Astronomical Journal, Volume 138, Issue 2, pp. 392-401 (2009) · Published in Astronomical Journal. Contains corrected versions of tables 3-5
arxiv created 2009/10/23 · arxiv updated 2009/12/01
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 independent of the choice of stellar mass estimator. We find a BTF slope of 3.94 +/- 0.07 (random) +/- 0.08 (systematic) and a zero point of 1.79 +/- 0.26 (random) +/- 0.25 (systematic). 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.