The double-lined spectroscopic binary Psi Orionis

Details The double-lined spectroscopic binary Psi Orionis The double-lined spectroscopic binary Psi Orionis

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pasp...97..428l&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 97, May 1985, p. 428-433. Research supported by the Min

Astronomy and Astrophysics

Astronomy

5

Binary Stars, Stellar Orbits, Stellar Spectrophotometry, Orbital Elements, Spectral Line Width, Stellar Luminosity, Stellar Rotation

Scientific paper

The spectroscopic orbits for both components of Psi Ori are determined from high-dispersion spectrograms measured by cross-correlation techniques. The orbital elements are listed in a table. From spectrophotometric measurements, the spectral types and luminosity classes are found to be B1 III for the primary star and B2 V for the secondary star, with mean projected rotational velocities of 95 km/s and 75 km/s, respectively. A luminosity ratio of 4.5, determined from the ratio of line strengths corrected for spectral type and corresponding to a difference of 1.6 m in the blue region of the spectrum, is found. The spectroscopic parallax which is obtained corresponds to a distance of 640 + or - 30 parsecs.

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