physics_UH3214_inclass_2.pdf - Physics-UH 3214 PHYS-UH 3214 Astrophysics In Class Questions 2 A Consider a star with a G2 spectrum and a parallax of

physics_UH3214_inclass_2.pdf - Physics-UH 3214 PHYS-UH 3214...

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Physics -UH 3214 PHYS-UH 3214 Astrophysics In Class Questions 2: A. Consider a star with a G2 spectrum and a parallax of 0.01 and a color excess E(B-V) = 0.3. If m V = 10.0, what is its approximate radius of the star in solar radii? What is the optical depth of the
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Unformatted text preview: ISM along the line of sight to the star? Note that the absolute magnitude of the sun is M sun =4.8 B. What is the peak frequency of the CMB? C. What temperature is a blackbody which peaks at 0.1 keV?...
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