[Mesa-users] BD deuterium burning

[Matias Jones]

Hi Ealeal,


Probably you need to modify the default rate_list.txt file (I guess is under data/rates_data/rate_tables/ dir) to include D burning. This worked for me.

I am using an older MESA version, but probably this is also the case for v23.5.1.



Cheers,


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Dr. Matías Jones F.
VLT Operations Staff Astronomer
ESPRESSO Instrument Scientist
SPHERE Instrument Scientist (IS2)
European Southern Observatory
Alonso de Córdova 3107, Vitacura, Santiago, Chile
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De: Mesa-users <mesa-users-bounces at lists.mesastar.org> en nombre de Bear Ealeal via Mesa-users <mesa-users at lists.mesastar.org>
Enviado: miércoles, 6 de agosto de 2025 12:26:50
Para: mesa-users at lists.mesastar.org
Asunto: [Mesa-users] BD deuterium burning

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Dear Mesa-users,

I am working on MESA 23.5.1 and I run the example from test -suite named: "make_brown_dwarf" with no changes.

mass and radius are:

mass_in_gm_for_create_initial_model = 1.9892d31 ! 0.01 Msun;  m_jupiter = 1.8986d30; msun = 1.9892d33

   radius_in_cm_for_create_initial_model = 3.5d10 ! 5 r_jupiter; r_jupiter = 6.9911d9.  ok for most brown dwarfs.

The age when the inilist stops is 2Gyr.

However, I do not get deuterium burning although I get raw_rate_r_h2_pg_he3 up to 1e18, the temperature at the center is too low also and there is no increase even not in the core in He3.
Does someone have experience with BD in MESA, especially how to make the deuterium burn ?

Thanks,

Ealeal



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