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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