view Abstract Citations (79) References (17) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Centaurus X-3. Hutchings, J. B. ; Cowley, A. P. ; Crampton, D. ; van Paradijs, J. ; White, N. E. Abstract Spectroscopic observations of Krzeminski's star at dispersions 25-60 A/mm are described. The primary is an evolved star of type O6-O8(f) with peculiarities, some of which are attributable to X-ray heating. Broad emission lines at 4640A (N III), 4686 A(He II) and H-alpha show self-absorption and do not originate entirely from the region near the X-ray star. The primary is not highly luminous (bolometric magnitude about -9) and does not show signs of an abnormally strong stellar wind. The X-ray source was 'on' at the time of optical observations. Orbital parameters are presented for the primary, which yield masses of 17 + or - 2 and 1.0 + or - 3 solar masses for the stars. The optical star is undermassive for its luminosity, as are other OB-star X-ray primaries. The rotation is probably synchronized with the orbital motion. The distance to Cen X-3 is estimated to be 10 + or - 1 kpc. Basic data for 12 early-type X-ray primaries are discussed briefly Publication: The Astrophysical Journal Pub Date: May 1979 DOI: 10.1086/157042 Bibcode: 1979ApJ...229.1079H Keywords: Astronomical Spectroscopy; Binary Stars; Early Stars; X Ray Sources; Emission Spectra; O Stars; Orbits; Stellar Luminosity; Astrophysics; Early-Type Stars:X-Ray Binaries; Spectra:X-Ray Binaries full text sources ADS | data products NED (6) SIMBAD (1)
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Hutchings et al. (1979) studied this question.