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

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

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008newa...13..255b&link_type=abstract

New Astronomy, Volume 13, Issue 4, p. 255-260.

Astronomy and Astrophysics

Astronomy

95.10.Gi, 95.75.De, 97.10.Nf, 97.10.Pg, 97.10.Ri, 97.80.Hn, 97.80.Fk

Scientific paper

The semi-detached eclipsing binary system V621 Cen (P = 3.68 d) has been analysed using the Wilson Devinney program, on the basis of light curves obtained in the GENEVA 7-colour photometric system, and radial velocity curves for both components measured with the cross-correlation technique. The physical and orbital parameters have been determined through a self-consistent simultaneous solution of the photometric and radial velocity curves. The effective temperature of the primary component has been determined from the photometric analysis, T=15,600±800K. The absolute elements of the components are for the primary (mass gainer), with the value of T fixed, M1 = 6.10 ± 0.10M&sun;, R1 = 4.58 ± 0.01R&sun;, M=-2.83±0.01, and for the secondary (mass loser), M2 = 2.09 ± 0.04M&sun;, R2 = 5.87 ± 0.01R&sun;, M=-0.86±0.01, T=8750±20K. The semi-major axis A of the relative orbit is 20.20 ± 0.12R&sun;. The estimated spectral types of the components are about B3/4 V (primary) and A0/1III (secondary). The equatorial rotational velocity of the primary is 63 km s-1. The distance to V621 Cen is evaluated to 1550 ± 140 pc, and the colour excess E[B2 - V1] to 0.270 ± 0.045.

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