Persistent features of astronomical bodies

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  • Thread starter MrG99
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Summary:

Curious if there are measurable qualities of a star which remain constant during its lifetime.

Main Question or Discussion Point

Hi there! I was curious if some stars, or any other large astronomical bodies, have some kind of signature which would remain constant/identifiable between phases of their lifetime (e.g., something that would identify star 'A' whether it was a low mass star or a red giant, or later on in a white dwarf phase).
 

Answers and Replies

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anorlunda
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How about position in the sky as a starting clue?

It sounds like a question for a SF story. Is that the case?
 
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stefan r
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The metals. Particularly the ratios between the r-process metals.
 
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  • #4
phyzguy
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As @stefan r said, there is a technique called chemical tagging, which alllows accurate measurements of the abundance of many elements in the star. Ideally, this gives each star a unique "fingerprint".
 
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