A hypothetical red dwarf orbits around a common center of mass with an invisible, except in X rays, companion. The semi-

[answerhappygod]

A hypothetical red dwarf orbits around a common center of mass
with an invisible, except in X rays, companion. The semi-major axis
of the dwarf’s orbit is estimated to be a = 0.02 A.U. Use the
Kepler law in the form of Newton a) calculate the total mass M =
m1+m2 of the system if the period of rotation is P = 8. 3368 hours.
b) Given that the mass of the red dwarf is m1 = 0.8 solar masses
using the result of sub-problem (a), what do you think is the
nature of the X-ray source?