Physical parameters of the Algol system V621 Centauri from simultaneous analysis of Geneva 7-colour light curves

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

“…Indeed, from eq. (3) it turns out that i d = 72.229 ± 1.879 deg, which is incompatible at 2.2 − σ level with i nd by Barblan et al (2008).…”

“…Table 1: Physical and orbital parameters of the V621 Cen binary system estimated by Barblan et al (2008) independently of the third Kepler law. The inclination angle i and the stellar masses M and m have been obtained by keeping the temperature T M fixed to 15,600 K. The relative accuracy is about 1% for all the parameters (0.03% for the inclination).…”

“…In this paper we will consider the Algol-type semi-detached (R m /a ∼ 0.3) eclipsing binary system V621 Cen composed by two stars-the primary, of mass M (mass gainer) and the secondary, of mass m, (mass loser) which fills its Roche lobe-in circular orbits with a period 1 P b ≈ 3.7 d. By using its orbital period we will be able to measure the dynamical tidal distortion parameter k m of the secondary. V621 Cen has been recently studied both spectroscopically and photometrically by Barblan et al (2008): in Table 1 we report the relevant system's parameters.…”

“…Barblan et al (2008) detected no orbital period's changes during their recent survey.2 P b can be determined both from spectroscopy and photometry, but the latter technique yields more accurate results.…”