| Homework
#6 |
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| � | Q2.� Spectroscopic parallax.� (Apparent) |
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| magnitude
= 5.4 for an O6 V star.� How far |
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| away
is it?� First need to get an absolute |
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| magnitude.� Can estimate it several ways |
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| (H-R
diagrams, mass-luminosity relation).�
I |
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| used
M = -5.6.� So: |
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| � | d (pc) = 10 (m-M+5)/5 = 103.2 = 1585 parsecs |
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