Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...233l..73p&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 233, Oct. 15, 1979, p. L73-L75.
Astronomy and Astrophysics
Astrophysics
12
B Stars, Binary Stars, Emission Spectra, Helium Ions, Stellar Spectra, Astronomical Spectroscopy, Radial Velocity, Stellar Envelopes, Stellar Radiation
Scientific paper
He II 4686-A emission has been detected in the spectrum of the binary Be star Phi Per. The emission has radial-velocity variations out of phase with the velocity variations of the primary. The amplitude of the variations is large, K2 = 121 + or - 9 km/s, and since K1 is approximately 16 km/s and P is approximately 127 days, the minimum masses in the system are 29 and 3.8 solar masses for the primary and secondary, respectively. It is suggested that the secondary is a hot compact object with a circumstellar envelope.
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