| Abstract. Galaxies follow tight scaling
relations linking their dynamical properties to their baryonic content. The
study of these dynamical laws strongly constrains cosmological models of galaxy
formation. I will present new results on the baryonic Tully-Fisher relation
(BTFR), which link the total baryonic mass of a galaxy to its outer rotation
velocity. I will discuss both successes and failures of LCDM models that
attempt to reproduce the BTFR using gas outflows from stellar feedback. In
particular, I will show that starburst dwarf galaxies in the nearby Universe
provide no evidence for massive gas outflows. Finally, I will present new
dynamical scaling laws that link the baryonic mass distribution of a galaxy
to the detailed shape of its rotation curve: these relations can be thought
of as local inner-galaxy counterparts of the BTFR.
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