Add grids for higher mass stars

[gdcteixeira]

We should consider for future enhancements to add atmosphere grids that cover High mass stars.

I don't know how easy this would be to implement but I found models for O and B stars.

http://nova.astro.umd.edu/Tlusty2002/tlusty-frames-models.html
O-type stars, 27500 K <= Teff <= 55000 K
Early B-type stars, 15000 K <= Teff <= 30000 K

This enhancement, in conjunction with increasing atmosphere grids for the lower-end of the mass ranges would be a big step in the code cover all stellar types.

[DanielAndreasen]

I fully support to add as many atmospheres as possible. Just remember that the usual EW method won't work for these stars since we will not be able to see any Fe lines. But we can still create synthetic spectra for these types of stars, so it's a good idea!

[gdcteixeira]

Yes, I was thinking on the synthesis aspect of it. :)