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Relationship between mass and surface temperature of a star

  1. May 5, 2011 #1
    i was wondering if there is a relationship between mass and temperature that would allow me to calculate the surface temperature of a blue super giant of 24 solar masses?

    or do i simply need more information to do this
     
  2. jcsd
  3. May 9, 2011 #2

    Drakkith

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    I think you would need to know things like age of the star, makeup of the star, and similar stuff.
     
  4. May 11, 2011 #3
    It's roughly T = T(sol)*M0.5 with M in solar masses.
     
  5. May 11, 2011 #4

    FtlIsAwesome

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    By using T = 5,778 * 24^0.5
    I get 28,306 K, which is slightly outside the 30,000 K - 52,000 K range for O class stars.
    So either I didn't use it right, or it doesn't work for O class stars.

    Probably what will be an important factor in determining surface temp is the spectral class (O B A F G K M), and luminosity.
     
  6. May 11, 2011 #5

    Vanadium 50

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    24 solar masses is enormous. This is more than Rigel; it's looking like something like Alnitak. Which, by the way, is around 30K. Getting within 10% with a hand-wavy formula is pretty good.
     
  7. May 11, 2011 #6

    Drakkith

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    Am I incorrect in thinking that age, metal content, and other various factors would affect the stars temp as well?
     
  8. May 20, 2011 #7
    so basically i think that there is no relationship between mass and temperature for non main sequence stars so this cant be done. cheers for your help anyways
     
  9. May 22, 2011 #8

    FtlIsAwesome

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    There might be a correlation between brightness/magnitude/luminosity and temperature, but that's just my guess.
     
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