[Mesa-users] Differences between MESA r10398 and 25.12.1 for rotating very massive stars

[Farag, Ebraheem]

Hello Natalija,

I notice you are using different amounts of overshoot in each inlist, perhaps that explains some of the differences you are seeing?

-EbF
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From: Mesa-users <mesa-users-bounces at lists.mesastar.org> on behalf of Natalija M via Mesa-users <mesa-users at lists.mesastar.org>
Sent: Monday, March 16, 2026 3:54 AM
To: mesa-users at lists.mesastar.org <mesa-users at lists.mesastar.org>
Subject: [Mesa-users] Differences between MESA r10398 and 25.12.1 for rotating very massive stars


Dear MESA users,

I am currently trying to switch from r10398 to 25.12.1, and while doing so I noticed some differences in the results.

I evolved rotating very massive stars with low metallicity using the inlists attached below (which are quite similar for both versions). For solar metallicity, the results are in very good agreement between the two versions. However, for lower metallicities, the models evolve very differently, as illustrated in the HR diagram. I am not sure what in the older version leads to this behavior.

I would greatly appreciate any help or guidance.

Best regards,
Natalija Mladenović
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