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Determination of tidal distortion in the eclipsing binary system V621 Cen by means of deviations from the third Kepler law |
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| Authors: | Lorenzo Iorio |
| Institution: | aIstituto Nazionale di Fisica Nucleare (INFN), Sezione di Pisa, Viale Unità di Italia 68, 70125 Bari (BA), Italy |
| Abstract: | In this paper we determine the tidal distortion parameter km of the secondary partner (mass loser) of the semi-detached eclipsing binary system V621 Cen by comparing the phenomenologically determined orbital period Pb=3.683549(11) d to the Keplerian one PKep computed with the values of the relevant system’s parameters determined independently of the third Kepler law itself. Our result is km=-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. |
| Keywords: | Stars: individual: V621 Centauri Binaries: eclipsing Binaries: close Stars: fundamental parameters |
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