Physics, 14.12.2019 04:31, lol15arec001
Suppose you observe a binary system containing a main-sequence star and a brown dwarf. the orbital period of the system is 1 year, and the average separation of the system is 1 au. you then measure the doppler shifts of the spectral lines from the main-sequence star and the brown dwarf, finding that the orbital speed of the brown dwarf in the system is 25 times greater than that of the main-sequence star.
how massive is the brown dwarf?
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