5
$\begingroup$

I was reading Stellar Evolution in Early Phases of Gravitational Contraction, by Chushiro Henyey, where he writes,

If $L \propto R^{-\alpha}$ along the path, the age of a star from the time when $R=\infty$ is given by $$t=C/(1-\alpha), C=GM^2/RL=10^{7.20}\left(\frac{M}{M_{\odot}}\right)^2\frac{R_{\odot}}{R}\frac{L_{\odot}}{L}\text{ years}$$ where $R$ and $L$ are the present values.

This seems to be just for stars on the Hayashi track (and treated here just for Population 1 stars). Is there a similar expression for stars on the Henyey track, or is the same expression valid in both scenarios?

Improve this question
$\endgroup$
2
  • 2
    $\begingroup$ I won't make this an answer yet. I doubt there is a straightforward way other than to compare with model tracks. The Henyey phase is very shortlived and when it occurs is exquisitely dependent on the adopted radiative opacities and convection treatment. $\endgroup$
    – ProfRob
    Commented May 24, 2015 at 21:07
  • 1
    $\begingroup$ @RobJeffries Would you consider revisiting to make it an answer now? $\endgroup$
    – called2voyage ♦
    Commented Feb 21, 2018 at 16:56

0

Reset to default

You must log in to answer this question.

Browse other questions tagged .