search

bertrandplez / Turbospectrum_NLTE

Turbospectrum v20 with NLTE capability
GNU General Public License v3.0
17 stars 3 forks source link

Interpolation Failed #22

Closed danangsetyo5364 closed 2 weeks ago

danangsetyo5364 commented 2 weeks ago

Hei! I want to calculate the abundance of my sample very metal-poor stars, with param: Teff = 44000, logg=0.1, and [Fe/H] = -3.7, AND I got error message: Interpolation failed? 'NoneType' object is not subscriptable didn't generate spectra or atmosphere

Do you know how to overcome this? I already check all the MARCS model atmosphere, and I have downloaded it all.

bertrandplez commented 2 weeks ago

Hi,

these parameters are totally outside the range allowed by MARCS models.

danangsetyo5364 commented 2 weeks ago

ah sorry, i mistaken write the temperature, the correct one is 4400K. How about these one?

stormnick commented 2 weeks ago

You can see the MARCS grid coverage here btw (Fig.1 in https://ui.adsabs.harvard.edu/abs/2023A%26A...669A..43G/abstract).

At logg around 0, the original MARCS doesn't go down to FeH = -3.7, that's why you run into the issue.

bertrandplez commented 2 weeks ago

The gravity is probably too low. You can check the parameter range of the initial grid.

danangsetyo5364 commented 2 weeks ago

OK, thanks for your advice! I already discussed this problem with my supervisor, and we have solved it. Thanks!