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Hertzsprung Russel diagram

I made some notes a few months ago on this topc but I'm unsure if they're correct:

The mass and radius of stars increases along the main sequence

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Reply 1

username456717

Yes, as does temperature and luminosity.

Reply 2

GPODT

Original post by nebelbon

Yes, as does temperature and luminosity.

Ah.
One more Q, do Wiens law and Stefan Boltzmanns relationship only apply to main sequence stars or all stars?

Thanks!

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Reply 3

arcturus7

Yes the general trend is for mass and radius to increase as you go along the main sequence, but it isn't set in stone - just a general trend. Also, it doesn't increase over the whole HRD, which is important to note.

Wien's Law applies to all stars as well as any object full stop, it's just a relationship between black body radiation peaks and temperatures.