Isothermal pressure support during gravitational collapse
= Isothermal pressure support during gravitational collapse
{title2=$pL^3/|W_g|\propto L$}
For fixed mass and <temperature>, $p\propto L^{-3}$, so the pressure-support scale $pL^3$ stays constant while gravitational binding scales as $L^{-1}$. Isothermal <pressure> therefore becomes relatively less important during homologous contraction.