Astrophysics - Stellar Evolution (Paper 2) Flashcards
1
Q
what is apparent magnitude?
A
how bright a star appears in the night sky
2
Q
what does apparent magnitude depend on?
A
its distance from Earth and its luminosity – how much power it produces
3
Q
what is absolute magnitude?
A
a measure of how bright stars would appear if they were all the same distance from the Earth
4
Q
what is a Hertzsprung–Russell diagram?
A
a diagram showing the relationship between a star’s luminosity and its surface temperature
temperature scale is reversed, hotter temperatures are closer to origin
5
Q
what are red giants/supergiants on a Hertzsprung–Russell diagram?
A
top right corner
6
Q
what are main sequence stars on a Hertzsprung–Russell diagram?
A
diagonal across the middle ()
7
Q
what are white dwarfs on a Hertzsprung–Russell diagram?
A
bottom left
