A new light-time effect study of TX Herculis

Ak T., Albayrak B., SELAM S. O., Tanriverdi T.

NEW ASTRONOMY, cilt.9, sa.4, ss.265-272, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 9 Sayı: 4
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1016/j.newast.2003.11.003
  • Dergi Adı: NEW ASTRONOMY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.265-272
  • Anahtar Kelimeler: binaries : close, stars : individual : TX Her, ECLIPSING BINARIES, PHOTOMETRY
  • Ankara Üniversitesi Adresli: Evet

Özet

A period study of the binary system TX Her based on the extensive series of minima times covering almost a century (95 years) indicates the periodic O-C variation for the system. This continuous oscillatory variation covers two maxima, about 16800 orbital periods, by the present observational data. It can be attributed to the light-time effect due to a third body with a period of 51.47 +/- 0.27 years in the system. The analysis yields a light-time semi-amplitude of 0.0143 +/- 0.0003 days and an orbital eccentricity of 0.81 +/- 0.02. Adopting the total mass of TX Her, the mass of the third body assumed in a co-planar orbit with the binary is M-3 = 0.48 +/- 0.02M. and the semi-major axis of its orbit is a(3) = 18.32 +/- 0.21 AU. (C) 2003 Elsevier B.V. All rights reserved.