A First Attempt to Calibrate the Baryonic Tully-Fisher Relation with Gas Dominated Galaxies
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چکیده
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. Subject headings: Galaxies: Kinematics and dynamics — Galaxies: Dwarf
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تاریخ انتشار 2009