BG Tri: An example of a low-inclination RW Sex-type nova-like
Hernández M.S. Tovmassian G. Zharikov S. Gänsicke B.T. Steeghs D. Aungwerojwit A. Rodríguez-Gil P.
1 May 2021Oxford University Press
Monthly Notices of the Royal Astronomical Society
2021#503Issue 11431 - 1441 pp.
We analyse a wealth of optical spectroscopic and photometric observations of the bright (V = 11.9) cataclysmic variable BG Tri. The Gaia DR2 parallax gives a distance d = 334(8) pc to the source, making the object one of the intrinsically brightest nova-like variables seen under a low orbital inclination angle. Time-resolved spectroscopic observations revealed an orbital period of P rm orb=3.8028(24)$ h. Its spectroscopic characteristics resemble RW Sex and similar nova-like variables. We disentangled the H α emission line into two components, and show that one component forms on the irradiated face of the secondary star. We suggest that the other one originates at a disc outflow area adjacent to the L3 point.
cataclysmic variables , dwarf novae , stars: individual: BG Tri , white dwarf
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Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Av. Gran Bretaña, Valparaíso, 1111, Chile
Instituto de Astronomía, Universidad Nacional Autónoma de México, Instituto de Astronomía, Ap 106, Ensenada, 22860, BC, Mexico
Al-Farabi Kazakh National University, Al-Farabi Ave., 71, Almaty, 050040, Kazakhstan
University of Warwick, Department of Physics, Gibbet Hill Road, Coventry, CV4 7AL, United Kingdom
Centre for Exoplanets and Habitability, University of Warwick, Coventry, CV4 7AL, United Kingdom
Department of Physics, Astronomy and Astrophysics Group, University of Warwick, Coventry, CV4 7AL, United Kingdom
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, 02138, MA, United States
Department of Physics, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand
Instituto de Astrofísica de Canarias, Vía Láctea s/n, La Laguna, Tenerife, E-38205, Spain
Departamento de Astrofísica, Universidad de la Laguna, La Laguna, Tenerife, E-38206, Spain
Instituto de Física y Astronomía
Instituto de Astronomía
Al-Farabi Kazakh National University
University of Warwick
Centre for Exoplanets and Habitability
Department of Physics
Harvard-Smithsonian Center for Astrophysics
Department of Physics
Instituto de Astrofísica de Canarias
Departamento de Astrofísica
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