Detection of the secondary of Algol

Details Detection of the secondary of Algol Detection of the secondary of Algol

Jun 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...222l.119t&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 222, June 15, 1978, p. L119-L122.

Astronomy and Astrophysics

Astrophysics

45

Companion Stars, D Lines, Eclipsing Binary Stars, Stellar Spectrophotometry, Sodium, Stellar Mass

Scientific paper

The first spectroscopic detection of Algol B is reported. The Na D lines of the secondary of Algol are identified on low-noise spectra, and measurements of these lines are used to determine the primary/secondary mass ratio as well as the individual masses of Algol A, B, and C. Solutions for the orbital elements yield values of 201 (+ or 6) km/s for the semiamplitude of the Algol B velocity curve and -9 (+ or - 11) km/s for the systemic velocity, in addition to a primary/secondary mass ratio of 4.6 + or - 0.1. The masses of Algol A, B, and C are estimated to be approximately 3.7, 0.81, and 1.7 solar masses, respectively. It is concluded that Algol B fills its Roche lobe and that mass transfer from Algol B to Algol A could explain the radio and X-ray emission from this eclipsing binary system.

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