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5x107 4x107 3x107 2x107 1 x107 630 640 650 660 670 680 690 Wovelength 3) (5 points) Using the figure above, for the same galaxy: a) (2.5 points) calculate the V-band Luminosity of the galaxy (in Lo) and the average surface brightness of the galaxy (in Lo pc-2) interior to Re. You may assume that Re in V-band is the same as that in R-band b) (1.5 points) calculate the total mass of this galaxy (in Mo). Since the PE of a Sérsic function is non-trivial, you may assume that the total mass can be calculated using a uniform density sphere with a radius of Re. c) (1 points) calculate the V-band apparent magnitude of this galaxy.

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