Light-Time Effect in Two Eclipsing Binaries: NO Vul and EW Lyr

Bulut A., Bulut I., Cicek C., Erdem A.

32nd International Physics Congress of Turkish-Physical-Society (TPS), Bodrum, Turkey, 6 - 09 September 2016, vol.1815 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 1815
  • Doi Number: 10.1063/1.4976438
  • City: Bodrum
  • Country: Turkey
  • Keywords: binaries, eclipsing, light-time effect, stars: individual: NO Vul and EW Lyr, PERIOD
  • Çanakkale Onsekiz Mart University Affiliated: Yes


In this study, orbital period variations of two eclipsing binary systems (NO Vul and EW Lyr) were discussed. Possible light time effects due to third bodies in these systems were re-examined. The mass function and orbital period of hypothetical third bodies were calculated to be 0.000627 +/- 1.000003 M-circle dot, 26.17 +/- 0.05 years and 0.12682 +/- 0.00003 M-circle dot, 77.23 +/- 0.72 years for NO Vul and EW Lyr, respectively.