Detection of a cyclic period change in the contact binary TU UMi

Camurdan D. Z., Ozkardes B.

CONTRIBUTIONS OF THE ASTRONOMICAL OBSERVATORY SKALNATE PLESO, cilt.52, sa.2, ss.5-24, 2022 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 52 Sayı: 2
  • Basım Tarihi: 2022
  • Doi Numarası: 10.31577/caosp.2022.52.2.5
  • Dergi Adı: CONTRIBUTIONS OF THE ASTRONOMICAL OBSERVATORY SKALNATE PLESO
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.5-24
  • Anahtar Kelimeler: Stars, binaries, eclipsing, Stars, Individual TU UMi, RW-COMAE BERENICES, RADIAL-VELOCITY, PARAMETERS, STARS, DEEP
  • Çanakkale Onsekiz Mart Üniversitesi Adresli: Evet

Özet

This study aims at timing the eclipses of the binary star TU UMi. The times of minima are taken from the literature, from our observations in April 2004 and from TESS observations between 2019 and 2022. The orbital period analysis of the system indicates that there is a cyclic oscillation with an amplitude of 0.0081d and a period of 9.03 yr, accompanied by a continuous decrease at a rate of dP/dt = ???1.12 ?? 10???7 d yr???1. We study the secular evolution of the orbital period of the system and the possibility of the existence of a third companion or the magnetic activity cycle of the primary component in the system.