Properties of the main-sequence eclipsing binary V442 Cygni

Details Properties of the main-sequence eclipsing binary V442 Cygni Properties of the main-sequence eclipsing binary V442 Cygni

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....94..712l&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 94, Sept. 1987, p. 712-722. NSF-supported research.

Astronomy and Astrophysics

Astronomy

14

Eclipsing Binary Stars, Line Shape, Main Sequence Stars, Radial Velocity, Stellar Spectrophotometry, Ubv Spectra, Light Curve, Stellar Evolution, Stellar Models

Scientific paper

Radial velocities, line profiles, and V, R photometry of V442 Cyg (F1+F2) are analyzed to obtain the fundamental properties of this detached main-sequence binary. The minima in the light curve (0.56 and 0.49 mag) are deep enough for definitive photometric orbits, despite the relatively small number of observations within eclipses. Comparison of the properties of these stars with theoretical models of stellar evolution shows a good match at an age of 1.3×109yr and a composition of x = 0.7, z = 0.03. The primary is very near the end of its core-hydrogen-burning lifetime.

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