[mesa-users] Definition abundance in profile.data

Hannah Brinkman brinkmanhe at gmail.com
Fri Dec 2 11:11:06 EST 2016

Dear Aaron,
thanks for the hint.
However, this means I have to rerun over a hundred simulations. This is not
a huge problem, but I'd still like to know what the units are for the add
abundance in the profile.data files, just to understand my output better.
With kind regards,

Op 2 dec. 2016 17:02 schreef "Aaron Dotter" <aaron.dotter at gmail.com>:

> Hi Hannah,
> Note that you can include various total abundance metrics in the history
> file by adding some of these lines to your history_columns.list:
>    ! mass totals for entire star (in Msun units)
>       total_mass h1
>       total_mass he4
>       ! etc.
>    ! log10 mass totals for entire star (in Msun units)
>       !log_total_mass h1
>       !log_total_mass he4
>       ! etc.
>    ! log10 mass fractions for entire star
>       !log_average h1
>       !log_average he4
>       ! etc.
> Cheers,
> Aaron
> On Fri, Dec 2, 2016 at 10:59 AM, Hannah Brinkman <brinkmanhe at gmail.com>
> wrote:
>> Dear all,
>> to get a better interpretation of the final state of my simulated stars,
>> I want to find the total abundance of elements in the star. I use the
>> standard set of isotopes and mesa version 8118.
>> Because the history.data only gives the abundance at the surface or at
>> the center, I wanted to use the final profile for the star to get the
>> stellar abundances.
>> However, when I multiply the abundance with the mass of the cell(dm), sum
>> these values, and divide this by the final stellar mass for each isotope,
>> which I thought should give the abundance of the isotope for the whole
>> star, and then add these abundances together, I get a number far larger
>> than 1.
>> This leads to my question, what is the definition of the abundance used
>> in the profile.data files? And how can I get the total abundance of the
>> isotopes for my star?
>> With kind regards,
>> Hannah Brinkman
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