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The spectral lines of two stars in a particular eclipsing binary system shift back and forth...

The spectral lines of two stars in a particular eclipsing binary system shift back and forth with a period of 7 months. The lines of both stars shift by equal amounts, and the amount of the Doppler shift indicates that each star has an orbital speed of 1.1×105 m/s relative to the other.

What are the masses of the two stars? Assume that each of the two stars traces a circular orbit around their center of mass. (Hint: See Mathematical Insight Measuring Stellar Masses.)

M1=M2= = ??? MSun  

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