[Mesa-users] wd_ignite ignition condition

[Josiah Schwab]

Hi Joe,

> For the wd_ignite model under star/test_suite uses the condition of
> total nuclear being 10^8 solar luminosities being the stopping
> condition for the model.
>
> Does anybody know of a reference providing the physical rationale for this value?

There's no physical rationale for this value.

At some point (Tc = 7-8e8 K) we should stop trusting mixing length
theory for the convective carbon burning, so that would make a good
stopping point.  The convective turnover time becomes comparable to the
nuclear heating time and you would start developing hot spots (in a
multi-D calc).  I attached some sample references justifying this.

Josiah


Wunsch, S. and Woosley, S. E. (2004)
Convection and Off-Center Ignition in Type Ia Supernovae
http://adsabs.harvard.edu/abs/2004ApJ...616.1102W

Woosley, S. E. et al. (2004)
Carbon Ignition in Type Ia Supernovae: An Analytic Model
http://adsabs.harvard.edu/abs/2004ApJ...607..921W

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