Exercise 18.4 (a) Assume that the Galaxy is a homogeneous disk and the Sun lies in the cen- tral plane of the disk. The

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Exercise 18 4 A Assume That The Galaxy Is A Homogeneous Disk And The Sun Lies In The Cen Tral Plane Of The Disk The 1 (60.09 KiB) Viewed 68 times

Exercise 18.4 (a) Assume that the Galaxy is a homogeneous disk and the Sun lies in the cen- tral plane of the disk. The absolute magnitude of a star is M, galactic latitude b, and distance from the central plane z. What is the apparent magni- tude of the star, if the extinction inside the Galaxy is a mag kpc-¹? (b) Assume that the thickness of the galactic disk is 200 pc. Find the apparent magnitude of a star with M = 0.0, b = 30°, distance r = 1 kpc, and a = 1 mag kpc¯¹.