Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pasp...93..297p&link_type=abstract
Astronomical Society of the Pacific, Publications, vol. 93, June-July 1981, p. 297-317.
Astronomy and Astrophysics
Astronomy
52
B Stars, Binary Stars, Line Spectra, Stellar Envelopes, Stellar Spectra, Stellar Spectrophotometry, Absorption Spectra, Astrometry, Computer Programs, Early Stars, Emission Spectra, H Lines, Helium, Iron, Radial Velocity, Signal To Noise Ratios, Stellar Evolution, Stellar Mass, Stellar Rotation
Scientific paper
High-dispersion high signal-to-noise ratio spectrograms of Phi Per have been obtained. The radial velocities of various spectral features have been measured and an orbit solution obtained. The Phi Persei system is found to consist of a 21 solar mass star, whose V sin i is 450 km/s, and a 3.4 solar mass secondary. The secondary is peculiar in that He II 4686 A emission arises from within its vicinity. It is suggested that the secondary is the helium core of a once more massive star, its mass having been transferred to the primary. Both stars in the system have circumstellar disks and the dimensions of these disks are discussed.
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