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  3. 1. a) the star μ cephei has an apparent magnitu

1. a) The star μ Cephei has an apparent magnitude of +4.73 in the V-band. How...

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Physics

1. a) The star μ Cephei has an apparent magnitude of +4.73 inthe V-band. How many times brighter is its apparent brightness inthe V-band than in the B-band if its B-V color index is +2.35?

b) Explain how μ Cephei’s apparent R-band magnitude of +1.98demon- strates why this star is also known as the Crimson Star.

c) Given that μ Cephei has a luminosity of 3.7 · 105L⊙, estimatethis star’s absolute magnitude given its distance of approximately1800 pc. As- sume that the Sun has an absolute bolometric magnitudeof +4.83.

d) μ Cephei also has a surface temperature of 3690 K, estimateits radius. If it were placed inside the Solar System, whichplanets would be orbitting inside of it?

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