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DN Bootis: A low mass-ratio W UMa-type contact binary

Selam, S. O.; Özavcı, İ.; Nelson, R. H. +2 more

New photoelectric BVR light curves and radial velocity curves were obtained for the HIPPARCOS discovery DN Boo at the TÜBİTAK National Observatory of Turkey (TUG) and Dominion Astrophysical Observatory (DAO), respectively, to determine physical nature of the variable. The character of the obtained light curves and double-lined spectroscopic struct…

Light curve analyses of new eclipsing binary systems with eccentric orbits

Bulut, İ.; Demircan, O.

A photometric study of seven new eclipsing binary systems with eccentric orbits, namely, V466 Car, V493 Car, V529 Car, MN TrA, V398 Lac, V402 Lac and V821 Cas, is presented. The photometric data analyzed were taken from the Hipparcos database. The secondary minima in all systems were shifted by different amounts from the phase 0.5 giving clear evi…

Apsidal motion and photometric elements of the eccentric eclipsing binary KL CMa

Bulut, İ.

The Hipparcos and ASAS light curves of the recently discovered eccentric orbit binary KL CMa were analyzed by using the Wilson-Devinney program. The analysis of the light curves and all available minimum times have revealed that the system is detached, with the orbital eccentricity e = 0.131 ± 0.007, the rate of change of the longitude of periastr…