- #1
alanthreonus
- 10
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Homework Statement
Given the luminosity profile L(r)=L0e(-r/D) and the density profile p(r) = v02/(4piGr2) find an expression for the mass-to-light ratio as a function of distance from the center of the galaxy r. Assume the ratio is unity at r = D.
The Attempt at a Solution
At first I thought I was just supposed to divide the density profile by the luminosity profile to get v02/(4piGr2L0e(-r/D)), but at r = D, that would yield v20e/(4piGD2L0), not 1, so I'm not really sure what to do.