Recent content by astrotizio

Sorry in the previous expression i forgot a constant

I agree, a point in the H-R diagram was a banal error. With the same temperature but different radii you obtain different luminosities in the vertical axis, following L = 4*pi*R^2*T^4

This is a convincing answer, thanks

Thanks for your answer

Hi all, I have a degree in physics and I worked in atmospheric physics and climate for many years. I'm an amateur astronomer and observe variable star magnitude oscillation. I like to participate to this forum to answer new questions.

Hi all, Star surface temperature determines the occurrence of photosphere, where radiation can escape from star interior due to diminishing gas ionization and radiation absorption. If it was true the star photospheres should have the same temperature and Herzsprung-Russell diagram should be...