[mesa-users] Questions about temperature constraint of triple alpha reaction and calculation of reverse rates.

Bill Paxton paxton at kitp.ucsb.edu
Sun Dec 1 00:08:32 EST 2013


On Nov 30, 2013, at 8:40 PM, 이현택 wrote:

> Hello everyone.
> I send this e-mail since I need some advices about triple alpha reaction constraint and calculation of reverse reaction rates. 
> in ~/mesa/rates/private/ratelib.f , there exist some subroutines, which calculates the triple alpha reaction rate using functional form.
> And these funtional form always have temperature constraint. 
> (For instacne, in case of 'Fynbo' to occur triple alpha reaction, temperature must be higher than 10^7 K.) 
> My first question is, if I provide a new triple alpha reaction rate in tabular form,does it has the same temperature constraint as the functional form?

rates given in tabular form can cover the full range of the mesa rate tables which by default is 2e5 to 2e10.

>  And my second question is, if I provide some new reaction rates in tabular form, does the mesa automatically calculates the reverse rate based on the given tabular reaction rates?

you will need to provide the reverse rate as another table -- mesa doesn't automatically calculate the reverse.

Good luck!


> -Cheers, Hyun-Taek.
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