# homework5 - AST 3722C Spring 2008 Homework#5 Due before...

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AST 3722C - Spring 2008 Homework #5. Due before class on Feb 26. Instructions: Solve each part of each problem below. Where math is involved, and unless otherwise indicated, show your work. 1. [2 points] You want to study the double star 32 Eridani. Star A has J2000 coordinates α A = 03 h 54 m 17 . 47 s and δ A = - 02 57 0 14 . 5 00 . Star B has J2000 coordinates α B = 03 h 54 m 17 . 28 s and δ B = - 02 57 0 09 . 9 00 . You want to start an observing campaign where you observe these two stars at many wavelengths across the EM spectrum, from ultraviolet to radio, with the following telescopes: wavelength telescope wavelength primary mirror regime range diameter (m) ultraviolet GALEX 135 nm to 280 nm 0.5 visible Hubble 3000 ˚ A to 9000 ˚ A 2.4 infrared (near) Keck 0.9 μ m to 2.5 μ m 10 infrared (mid) Subaru 5 μ m to 23 μ m 8 infrared (far) Spitzer 24 μ m to 160 μ m 0.85 radio (submillimeter) JCMT 0.35 mm to 0.85 mm 15 radio (millimeter) ARO 1 mm to 3 mm 12 radio (microwave) GBT 0.7 cm to 21 cm 100 (a) Calculate the separation of star A and star B, in arcseconds. (b) For each telescope, calculate the Rayleigh criterion at both the short and long wave-

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## This note was uploaded on 11/09/2009 for the course AST 4700 taught by Professor Fernandez during the Spring '09 term at University of Central Florida.

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homework5 - AST 3722C Spring 2008 Homework#5 Due before...

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