[mesa-users] Pulsating star in the HB using GYRE

RICHARD H D TOWNSEND townsend at astro.wisc.edu
Sun Jan 24 21:10:35 EST 2016

Hi folks —

> On Jan 24, 2016, at 7:32 PM, Hideyuki Saio <saio at astr.tohoku.ac.jp> wrote:
> Hi Cyrus,
> Your calculation results look to me quite reasonable.
>> Maybe the fact that my convection zone disappear is linked to the absence of barrier on the red side for the instability strip.
> I guess, the disappearance of the convective core is just due to the exhaustion of helium in the center, which is nothing to do with excitation of radial pulsations.
> Pulsation in the red side of the instability strip should be suppressed by convection-pulsation coupling in the envelope. I guess, the effect is not included in the GYRE code, and you found many pulsation modes excited in the red side of the instability strip.

Yes, Hideyuki is quite correct here — GYRE does not include the pulsation-convection coupling, and thus cannot set the red edge correctly. Adding in this coupling is on my to-do list for 2016.



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