[mesa-users] abundances of all isotopes

[Bill Paxton]

On May 7, 2014, at 1:47 PM, Bill Paxton wrote:

> Hi Mathieu,
> 
> This is an interesting question --- mesa ignores all isotopes that are not in the current reaction network.  so if you want to estimate other abundances, you are on your own for now.   perhaps you could use the value of Z from mesa and use one of the metals abundance compilations to calculate the abundance assuming that particular distribution.   (see e.g., AG89_element_zfrac and friends in chem/public/chem_def).
> 
> or you could find the element abundance in your composition from mesa/star and then use Lodders (2003) isotopic percentages to get isotope abundances.



i should have mentioned that the Lodders isotopic percentages are also available in mesa/chem



> 
> good luck! 
> 
> if you come up with a scheme you like, let us all know -- perhaps it belongs in mesa.
> 
> cheers,
> Bill
> 
> 
> 
> 
> 
> 
> On May 7, 2014, at 1:37 PM, Mathieu wrote:
> 
>> Hi MESA users,
>> 
>> I'd like to plot the abundances of some isotopes not included in the 
>> reaction network I am using.
>> In particular I would be interested in the isotopes from the file 
>> mesa/data/rates_data/ecapture_states.list ,
>> which, if I am correct, are the one capturing electrons and positrons.
>> Where can I find these abundances, or alternatively, how does MESA 
>> calculates their abundances?
>> 
>> Thanks!
>> 
>> Mathieu
>> 
>> 
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