Absolute parameters of the early-type double-lined eclipsing binary AL SCULPTORIS (HD 224113)

Details Absolute parameters of the early-type double-lined eclipsing binary AL SCULPTORIS (HD 224113) Absolute parameters of the early-type double-lined eclipsing binary AL SCULPTORIS (HD 224113)

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...179..141h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 179, no. 1-2, June 1987, p. 141-156.

Astronomy and Astrophysics

Astrophysics

10

Astronomical Spectroscopy, Early Stars, Eclipsing Binary Stars, Orbital Elements, Stellar Orbits, Astronomical Photometry, High Dispersion Spectrographs, Light Curve, Radial Velocity, Stellar Evolution

Scientific paper

Orbital elements have been determined from measurements of forty-six high-dispersion spectrograms obtained between 1970 and 1980 of the double-lined eclipsing binary AL Scl, and the published radial-velocity data of Archer and Feast (1958) have been rediscussed. The orbit is confirmed to be non-circular (e = 0.074), and the components are shown to be rotating non-synchronously. The possibility of a third body is discussed but not firmly established. Approximately 2800 uvby observations, obtained between 1978 and 1981, form the basis of a photometric solution using the synthesis code LIGHT (Hill, 1979). The absolute dimensions derived for the B6 V primary component are in good agreement with the compilation of empirical data for early-type binaries given by Popper (1980), but the mass (1.71 M_sun;) derived for the B9 V secondary is lower than expected. A comparison of the absolute parameters with evolutionary tracks (Hejlesen, 1980) indicates the age of the system to be 1.6×108yr.

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