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Estimate the number of stars with present-day luminosity function

  1. Nov 11, 2013 #1

    Please don't flame me for this as it is probably already answered somewhere.
    How does one estimate the number of stars in a 500pc^3 which have a range of 10^-2 to 0.1 Lsun?

    I am not a maths head, so simple answer that would have the formula would be great.

    Last edited by a moderator: Nov 11, 2013
  2. jcsd
  3. Nov 11, 2013 #2


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    This survey of low mass stars by Bochanski is among the more recent ones - http://arxiv.org/abs/1004.4002. Bochanski reports 15.37 million stars in a volume of 4x4x4 kpc^3 in the range of 0.1 - 0.8 Msolar. That corresponds to a luminosity range of about .003 Lsolar to .458 Lsolar. I'm not aware of any formula for calculating these numbers.
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