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daw538 / y4project

Fourth Year Masters project at University of Birmingham, investigating the helium glitch with asteroseismology to obtain a measure of helium abundance in stars.
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rgdata-hbm-tau-reparam.ipynb #18

Closed daw538 closed 5 years ago

daw538 commented 5 years ago

I think I've reparameterised A correctly to follow the form A0=Ae^(nmax/tau) however convergence has been thown off somewhat. Namely, epsilon is consistently larger than it should be (~5 vs ~1); imposing limits on the parameter in the code cause rhats to rocket, so clearly it isn't happy with what I have at the moment.

The oscillations themselves are coming out pretty large in some cases (see out[25] or out[28]), but not for all the stars.

grd349 commented 5 years ago

Hi Dan,

I can't look at this till tomorrow (afternoon).

Have you tried some simple tests? Have you tried removing the hierarchical part of epsilon?

G

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daw538 commented 5 years ago

That's fine. I've tried adding/removing some things one by one but I'll have a further tinker to see if I can make any more progress.