The unique eclipsing binary system V541 Cygni with relativistic apsidal motion

Details The unique eclipsing binary system V541 Cygni with relativistic apsidal motion The unique eclipsing binary system V541 Cygni with relativistic apsidal motion

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...299..668k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 299, Dec. 15, 1985, p. 668-673.

Astronomy and Astrophysics

Astrophysics

25

Eclipsing Binary Stars, Relativistic Effects, Stellar Orbits, Apsides, Electrophotometry, Light Curve, Orbital Elements, Stellar Magnitude

Scientific paper

The first photoelectric light curve has been obtained for the binary star V541 Cygni (B8.5 V+B8.7 V, P = 15d.34) discovered by Kulikowski (1948). The light curve exhibits extremely narrow and deep minima of almost equal depth. Photometric elements are determined. Very small relative radii, orbital inclination close to π/2, high eccentricity (e = 0.474), and favorable orientation of the line of apsides with respect to an observer, as well as close similarity of the components, render the V541 Cyg system unique among eclipsing binaries. The apsidal motion in this system has been detected. The observed rotation rate of the line of apsides, ωobs = 0°.090±0°.013 yr-1, agrees within the errors with the prediction by general relativity.

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