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Homework Help: Finding the mass of stars that evolved away.

  1. May 2, 2006 #1
    If the stars in the Pleiades open cluster are about 100*10^6 years old, how do I find the mass of the stars that evolved away from the main sequence to form red giants? Any suggestions or comments are welcome!

    Thanks!
     
  2. jcsd
  3. May 2, 2006 #2

    SpaceTiger

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    What are you working from? Do they expect you to derive a relationship between mass and lifetime or just to know it?
     
  4. May 2, 2006 #3
    The information I posted above is all I've been given. If there are common formulas for this available, I suppose I don't need to derive them.

    Thanks!
     
  5. May 2, 2006 #4

    SpaceTiger

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    See if this page helps:

    http://scienceworld.wolfram.com/astronomy/MainSequence.html" [Broken]
     
    Last edited by a moderator: May 2, 2017
  6. May 2, 2006 #5
    Thanks for that page. Is there some way to relate the age of the star to its luminosity? Do I need to do that?

    Thanks!
     
  7. May 2, 2006 #6

    SpaceTiger

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    Does the problem ask for a luminosity?

    Do yiou know how to normalize the relation I gave -- that is, do you know the temperature and mass of the sun?
     
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