You've just discovered a new X-ray binary, which we will call Hyp-X1 ("Hyp" for hypothetical). The system Hyp-X1 contains a bright, B2 main-sequence star orbiting an unseen companion. The separation of the stars is estimated to be 21 milion kilometers, and the orbital period of the visible star is 3 days. (a) Use Newton's version of Kepler's third law to calculate the sum of the masses of the two stars in the system. (Hinr. See Mathematical Insight Measuring Stellar Masses in the textbook) Give your answer in both kilograms and solar masses MS-2.0 x 10^30 kg) Express your answer in kilograms to two significant figures. (b) Express your answer as a multiple of Sun's mass to two significant figures. (c) Determine the mass of the unseen companion.(Hint A main-sequence star with spectral type B2 has a mass of about 10 MSun) Express your answer as a multiple of Sun's mass to two significant figures.

You've just discovered a new X-ray binary, which we will call Hyp-X1 ("Hyp" for hypothetical). The system Hyp-X1 contains a bright, B2 main-sequence star orbiting an unseen companion. The separation of the stars is estimated to be 21 milion kilometers, and the orbital period of the visible star is 3 days. (a) Use Newton's version of Kepler's third law to calculate the sum of the masses of the two stars in the system. (Hinr. See Mathematical Insight Measuring Stellar Masses in the textbook) Give your answer in both kilograms and solar masses MS-2.0 x 10^30 kg) Express your answer in kilograms to two significant figures. (b) Express your answer as a multiple of Sun's mass to two significant figures. (c) Determine the mass of the unseen companion.(Hint A main-sequence star with spectral type B2 has a mass of about 10 MSun) Express your answer as a multiple of Sun's mass to two significant figures.

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