The orbital period of the binary system

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The orbital period of the binary system containing A0620-00 is 0.32 day, and Doppler shift measurements reveal that the radial velocity of the X-ray source peaks at 457 km/s (about 1 million miles per hour). (a) Assuming that the orbit of the X-ray source is a circle, find the radius of its orbit in kilometers. (b) By using Newton's form of Kepler's third law, prove that the mass of the X-ray source must be at least 3.1 times the mass of the Sun.(hint: Assume that the mass of the K5V visible star--about 0.5 M solar from the mass-luminosity relationship--is negligible compared to that of the invisible companion.)

Reference no: EM13219610

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