Determination of tidal distortion in the eclipsing binary system V621 Cen by means of deviations from the third Kepler law

Details Determination of tidal distortion in the eclipsing binary system V621 Cen by means of deviations from the third Kepler law Determination of tidal distortion in the eclipsing binary system V621 Cen by means of deviations from the third Kepler law

2008-01-06

arxiv.org/abs/0801.0834v1

NewAstron.13:473-475,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Latex, 6 pages, no figures, 1 table. To appear in New Astronomy

Scientific paper

10.1016/j.newast.2008.01.004

In this paper we determine the tidal distortion parameter k_m of the secondary partner (mass loser) of the semi-detached eclipsing binary system V621 Cen by comparing the phenomenologically determined orbital period P_b=3.683549(11) d to the Keplerian one P^Kep computed with the values of the relevant system's parameters determined independently of the third Kepler law itself. Our result is k_m = -1.5 +/- 0.6. Using the periastron precession, as traditionally done with other eclipsing binaries in eccentric orbits, would have not been possible because of the circularity of the V621 Cen path.

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