[Mesa-users] Tip of the Red Giant Branch

[Francis Timmes]

hi mitchell,

> Is this typical for MESA at the TRGB ...


mesa is a tool, not a model. i note that the inlist for your model
relies entirely on the default mass and temporal resolution criteria.
these default settings may be good enough for a nightly test suite case, 
but they are probably not good enough for publication quality science.
best practices includes varying the default settings:

https://docs.mesastar.org/en/latest/using_mesa/best_practices.html

others can chime in on color filters ...

fxt







> On Sep 30, 2021, at 5:32 PM, Mitchell Dennis <mtde226 at hawaii.edu> wrote:
> 
> Dear MESA Mailing List,
>  
> I am doing work on stars at the tip of the red giant branch, and although several research papers cite an iBand Magnitude of -4.1 with a theoretical iBand Magnitude of ~-4, many of my models only reach an iBand Magnitude of -3.8. Is this typical for MESA at the TRGB, or am I missing a correction that I need to apply to the MESA absolute magnitude iBand output?
>  
> My current stopping condition is the power_he_upper_burn_limit which is set to 1.0d6. Typical mass, metallicity and helium abundance are 1.0, 0.0006 and 0.25.
>  
> I’ve attached a copy of my inlist which is based on the test_suite he_core_flash, and my run_star_extras file is unmodified. 
>  
> Do you have any suggestions for determining whether a model will flash or not?
>  
> Thanks for the help
>  
> Best Regards,
> Mitchell T Dennis
> Graduate Student
> UH Manoa – Institute for Astronomy
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