Period Study of V1095 Her and V1101 Her


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Öztürk O. , Erdem A. , Aliçavuş F.

ÇANAKKALE ONSEKİZ MART ÜNİVERSİTESİ FEN BİLİMLERİ ENSTİTÜSÜ DERGİSİ, vol.2, no.1, pp.68-83, 2016 (National Refreed University Journal)

  • Publication Type: Article / Article
  • Volume: 2 Issue: 1
  • Publication Date: 2016
  • Doi Number: 10.28979/comufbed.307876
  • Title of Journal : ÇANAKKALE ONSEKİZ MART ÜNİVERSİTESİ FEN BİLİMLERİ ENSTİTÜSÜ DERGİSİ
  • Page Numbers: pp.68-83

Abstract

So far, there is neither photometric nor spectral study on both of the systems in the literature. SuperWASP light curves and orbital period variations of V1095 Her and V1101 Her were analyzed for the first time in this study.  A weighted least-squares method was applied to each O-C data sets by using a MATLAB code given by Zasche et al. (2009) to find their quadratic ephemeris.  Since the cyclic O-C variations were seen in the O-C diagrams, the light travel time effect (LTE)  analysis were also performed by the same MATLAB code. Wilson & Deviney (1971) code is used for the SuperWASP light curve solution. The O-C diagrams of V1095 Her and V1101 Her show sinusoidal variations superimposed on a downward parabola and upward parabola, respectively.  Rates of secular period decrease of V1095 Her and period increase of V1101 Her were calculated.  Physical mechanisms which could cause of these period changes were discussed.  Cyclic changes in the O-C diagrams were interpreted by means of the LTE.   Photometric mass ratio is obtained and approximate absolute parameters of the systems are predicted.