The CCD photometric study of the newly identified RS CVn binary star V1034 Hercules

Dogru D., ERDEM A., DOGRU S. S.

NEW ASTRONOMY, vol.14, no.8, pp.711-715, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 14 Issue: 8
  • Publication Date: 2009
  • Doi Number: 10.1016/j.newast.2009.05.002
  • Journal Name: NEW ASTRONOMY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.711-715
  • Keywords: Stars: binaries: close, Stars: binaries: eclipsing, Technique: photometry, Stars: individual: V1034 Hercules, LIMB-DARKENING COEFFICIENTS, LIGHT CURVES
  • Çanakkale Onsekiz Mart University Affiliated: Yes


This paper presents a new CCD Bessell VRcIc light curves and photometric analysis of the newly discovered RS CVn type eclipsing binary star VI 034 Her. The light curves were obtained at the Canakkale Onsekiz Mart University Observatory in 2006. Variations of the orbital period of the system were firstly studied. The (O - C) diagram with a low range of observing time of about 20 years shows an upward parabola, which indicates a secular increase in the orbital period of the system. The light curves are generally those of detached eclipsing binaries; however, there are large asymmetries between maxima. The VRcIc light curves were analysed with two different fitting procedures: Wilson-Devinney method supplemented with a Monte Carlo type algorithm and Information Limit Optimization Technique (ILOT). Our general results find V1034 Her. as a well detached system, in which the components are filling similar to 65% of their Roche lobes. Light curve asymmetries of the system are explained in terms of large dark starspots on the primary component. The primary star shows a long-lived spot distribution with active longitudes in the same hemisphere. (C) 2009 Elsevier B.V. All rights reserved.