AN ACTIVE TRIPLE SYSTEM 44i BOOTIS

Автор(и)

  • T. Pribulla Astronomical Institute of the Slovak Academy of Sciences, 059 60 Tatranska Lomnica, Slovakia, Slovakia
  • J. Tremko Astronomical Institute of the Slovak Academy of Sciences, 059 60 Tatranska Lomnica, Slovakia, Slovakia
  • H. Rovithis-Livaniou Section of Astrophysics, Astronomy & Mechanics, Dept. of Physics, University of Athens, GR 15784, Zografos, Greece, Greece
  • P. Rovithis Astronomical Institute, The National Observatory of Athens, P.O. Box 20048, GR 11810 Athens, Greece, Greece

DOI:

https://doi.org/10.18524/1810-4215.2001.14.99483

Ключові слова:

Stars, binary, contact, stars, individual, 44i Boo

Анотація

The long-term UBV R photoelectric monitoring of 44i Boo performed at the Skalnate Pleso, Stara Lesna and Kryonerion observatories is presented. The orbital period changes are discussed including light-time effect caused by the visual companion. The radial velocity of the visual companion as well as observed period change conclusively determine the ascending node of the visual orbit to be in the first quadrant. The light curve of the system was found to be quite stable but asymmetric: maximum in the phase 0.25 has always been fainter than maximum in the phase 0.75. Light-curve analysis of the V observations since 1998 provided new inclination angle i=73.66 ± 0.14°. Combination of the inclination angle with the published spectroscopic elements gave reliable masses of the components: m 1 =0.861±0.008 M ⊙ and m 2 = 0.419±0.11 M ⊙.

Посилання

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Опубліковано

2017-04-20

Номер

Том 14 (2001)

Розділ

Статті

Ліцензія

Авторське право (c) 2017 Odessa Astronomical Publications

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