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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.
MIT License
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Solar_Modes.ipynb #7

Closed woolieJ closed 5 years ago

woolieJ commented 5 years ago

Using the Vrard model parameters for estimation of amplitude and period are so different to the oscillation from BiSON data that the stan code cannot converge.

grd349 commented 5 years ago

Yes - the priors for red giants wont work on the Sun.

Try modelling by hand to see what sensible values should be.

1 - Write the Vrard function in Python

2 - Pick some parameters as guesses and compare the model to the data by eye

3 - Update the parameters until things look like the best yo can do.

4 - Change your priors in the Stan model to reflect what you now know and put your best parameters in at the start position for the stan code.

Does that make sense?

woolieJ commented 5 years ago

Yes thanks :)