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General InfoEdit

WhatEdit

The Kevin-Helmholtz timescale describes how long a star can continue to output a constant luminosity based on the energy it radiates away from gravitational collapse.

DefinitionEdit

$t_\textrm{KH} = \frac {\Delta E_g}{L}$

NotesEdit

• We can determine $\Delta E_g$ by using the Virial Theorem to determine the initial and final energies of the star based on its initial and final radii