- Why does this relationship involves the absolute magnitude of the sun and its luminosity?
- How to derive an expression relating the absolute magnitude of a star to its luminosity?
So according to the magnitude equation, m−M=2.5logleft(fracd2d20right)
RightarrowM=m−2.5logleft(fracd2d20right)(eq1)
and Luminosity is L=4pi(d2)timesf
Rightarrowd2=fracL4pitimesf(eq2)
Plugging eq2 to eq1 would have seem reasonable, but how is absolute magnitude of the sun and its luminosity used?
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