|MadSci Network: Astronomy|
I have some questions on black hole detection (via working out mass of other star in binary ‘star’ pair)…So far I have been found out that a star's mass can be figured out by looking at it's spectrum. I have found out that each element leaves a unique color on spectrum, and so by looking at the colors on a spectrum you can work out the elements in a star and (if you knew how much of it's element the star was somposed off) you could therefore work out the mass of the star. But I don't know how to work out the persentage of each element in the star and therefore can't work out it's weight. Here are my questions: When you try to work out the mass of a star from it’s spectrum (by finding the stars element composition (the different elements and their percentage in the star) and by finding the weight of these elements), how do you work out what percentage each element is in the star? Do you just base your results (on the percentage of each element) by how ‘thick’ each line appears on the spectrum compared to the others, by doing an overall scale of the spectrum and determining it’s ratio compared to other elements? Can you please tell me more information about this process?
Re: how do you work out the mass of star by its spectrum?
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