Photometric study and absolute parameters of the short-period eclipsing binary HH Bootis

Gurol B., Bradstreet D. H., Demircan Y., Gursoytrak S. H.

NEW ASTRONOMY, ss.26-36, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1016/j.newast.2015.04.011
  • Dergi Adı: NEW ASTRONOMY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.26-36
  • Anahtar Kelimeler: Stars: binaries: eclipsing, Stars: fundamental parameters, Technique: photometry & spectroscopy, Stars: individual (HH Boo), LIGHT CURVES, STAR LIGHT, SYSTEMS
  • Ankara Üniversitesi Adresli: Evet

Özet

We present the results of our investigation on the geometrical and physical parameters of the W UMa type binary system HH Bootis from new CCD (BVRI) light curves and published radial velocity data. The photometric data were obtained in 2011 and 2012 at Ankara University Observatory (AUO). Light and radial velocity observations were analyzed simultaneously using the Wilson Devinney (2013 revision) code to obtain absolute and geometrical parameters. The system was determined to be a W-type W UMa system of a type different from that suggested by Dal and Sipahi (2013). An interesting cyclic period variation in the time intervals between primary and secondary eclipses ("half-period variation") was discovered and analyzed and its possible cause is discussed. Combining our photometric solution with the spectroscopic data we derived masses and radii of the eclipsing system to be M-1 = 0.627M(circle dot), M-2 = 1.068M(circle dot), R-1 = 0.782R(circle dot) and R-2 = 0.997R(circle dot). New light elements were derived and finally the evolutionary status of the system is discussed. (C) 2015 Elsevier B.V. All rights reserved.