The Kormendy relation for ellipticals can be written as He = 20.2 + 3.0 log R. where Re is the half-light radius (in kpc) and ue is the surface brightness (in magnitudes per square arc second) at Re. An elliptical galaxy obeying this relation will have a total luminosity Lo R for some index n. What is the correct value of n? O a. r -6/5 O b. n= 4/5 Oc n= 16/5 n cannot
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