Abstract
view Abstract Citations (66) References (19) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The spectroscopic orbit and masses of SK 160/SMC X-1. Hutchings, J. B. ; Crampton, D. ; Cowley, A. P. ; Osmer, P. S. Abstract Thirty-one spectrographic observations have been obtained of SK 160, with dispersions from 12 to 52 A/mm. Radial velocities from these lead to a spectroscopic orbit which implies masses of about 16.2 and 1.02 solar masses for the two components and i = 64-70 deg for the system. Mass exchange appears to be by Roche-lobe overflow rather than a strong stellar wind. There are also spectroscopic indications of a heating effect by X-rays, but no line-velocity distortions are found, in rough agreement with calculations. Radial velocities and intensity measurements of He II 4686-A emission suggest that the line is formed in a hot spot between the two stars and slightly trailing the X-ray source. Publication: The Astrophysical Journal Pub Date: October 1977 DOI: 10.1086/155569 Bibcode: 1977ApJ...217..186H Keywords: Eclipsing Binary Stars; Orbital Elements; Stellar Mass; Stellar Spectra; X Ray Stars; H Alpha Line; Radial Velocity; Stellar Luminosity; Stellar Rotation; Stellar Spectrophotometry; Stellar Winds; X Ray Astronomy; Astrophysics full text sources ADS | data products SIMBAD (3)
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