[Mesa-users] Mesa-users Digest, Vol 67, Issue 1

[Biswas, Anwesha [PHYSA]]

Hello,

check the rn script and see if there are any optional inlist (which is usually disabled to speed up the process) which it should be running to incorporate those initial conditions.


Anwesha

⭐️stars are nature's own musical instruments⭐️
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Today's Topics:

   1. Lithium Abundance Issues in the Convective Layer and
      Pre-models (Henry Bloss)


----------------------------------------------------------------------

Message: 1
Date: Thu, 2 Feb 2023 02:37:00 -0500
From: Henry Bloss <hbloss at nd.edu>
To: mesa-users at lists.mesastar.org
Subject: [Mesa-users] Lithium Abundance Issues in the Convective Layer
        and Pre-models
Message-ID:
        <CADkk6bBNmPi_gpiiqRtMsROFnMWyg+fnKqMQjLZCfEv7hQHY5w at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Hello,

I am currently trying to examine astrophysical solutions to the lithium
problem using MESA.  To do so, I've modified the Low Z test suite of MESA
to fit the specific parameters I need.  Unfortunately, I am having issues
with my lithium abundance in the outer convective layer.  Li7 drops off at
-22 on a log abundance scale in the outer layer, instead of rising to
roughly -9.

More broadly, even when I specify what abundances the model should be using
in its initial conditions, the model does not seem to use these initial
conditions.  I have included how I specified these conditions:

(In my Inlist's Star Job): initial_zfracs=0;

(In my Inlist's Controls):
z_fraction_li= 3.564854E-9
z_fraction_be=1.084685E-8
z_fraction_b=1.838182E-7
z_fraction_c=0.1819942
etc.

I have attached a photo of my plot immediately after burning has begun in
the star.
[image: Screenshot 2023-02-01 at 10.53.23 PM.png]

I suspect that constructing a pre_ZAMS model and THEN specifying these
conditions rather than trying to do everything from scratch may fix this
problem.  In that case, how would I go about constructing this pre main
model?

Thank you for any help you can provide with this subject!

*Henry Bloss **(he/him)*
University of Notre Dame | Class of 2025
Physics Major | Math Major
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