The GYRE Forums

Going through the final touches, I notice that part of this analysis doesn't quite add up for me. If the mode angular frequency agrees with the dimensionless frequency, as in sign(sigma)=sign(omega), and the time dependence is amplitude ~ exp(-i sigma t) Then this would lead to amplitude ~ exp(-i si...

The physics behind the displacement vector, specifically the radial part (\xi_r), confuse me a bit, Using the relation between lagrangian and eulerian perturbations for scalar quantities, it quickly becomes apparent that \delta r = r' + \xi_r However, I have some nagging feeling in the back of my mi...

I am somewhat confused, trying to understand the oscillation equations completely. Many of them contain the term \omega_c. Is this the acoustical cutoff frequency for the model, or, as I think it might be in $GYRE_DIR/src/context/gyre_context.fpp, is it just the corotating frequency (which would the...

Thanks for the detailed explanation. I was having a hard time wrapping my head around it.

Also, Günter Houdek sends his regards (he's my thesis advisor)

When doing non-adiabatic frequencies, I am having a hard time figuring out the significance of the relation between the sign of the imaginary part of the eigenfrequency and the damping rate. Does anyone know the relation,or how to figure it out from the GYRE odcumentation? Kind regards - Peter Juels...

Thanks a lot.
Now my models make a lot more sense

Hi. tl;dr: How are the opacity derivatives kap_T and kap_rho defined? I have issues with a model and the amplitude of the opacity derivatives, with the shape of the slope being more or less correct, when compared to a similar model computed with MESA, but the amplitudes are vastly different (For kap...

Hi all. I'm trying to run NAd calculations with an AMDL file. As such, I am missing some structure coefficients, namely the nabla_ad and c_thn. nabla_ad = adiabatic temperature gradient, if I am not mistaken, but what is c_thn? I am thinking of modifying the amdl-reading routine on my local installa...