PV Gap

Calvin Said:

Help with a stellar mass (astronomy) question?

We Answered:

The masses of the two stars are equal because the amplitudes of their doppler shifts are equal.

v = 60000 m/s
P = 270 days = 2.333e7 sec
v = 2?R / P
R = vP / (2?)
R = 2.228e11 meters
M = M? = M?
M = 2?²R³/(GP²)
G = 6.674e-11 m³ kg?¹ sec?²
M = 6.01e30 kg
M = 3 solar masses

Each of the stars has three times the mass of the sun.