BG Tri: an example of a low-inclination RW Sex-type nova-like
| Autor: | M. S. Hernandez, D. Steeghs, Pablo Rodríguez-Gil, S. V. Zharikov, A. Aungwerojwit, G. H. Tovmassian, Boris T. Gänsicke |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
010504 meteorology & atmospheric sciences FOS: Physical sciences White dwarf Cataclysmic variable star Astronomy and Astrophysics Astrophysics Orbital period 01 natural sciences Orbital inclination Orb (astrology) Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science 0103 physical sciences H-alpha Emission spectrum Parallax 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) 0105 earth and related environmental sciences |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 503:1431-1441 |
| ISSN: | 1365-2966 0035-8711 |
| Popis: | We analysed a wealth of optical spectroscopic and photometric observations of the bright (V=11.9) cataclysmic variable BG Tri. TheGaiaDR2 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 the orbital period of P(orb)=3.h8028(24). Its spectroscopic characteristics resemble RW Sex and similarnova-like variables. We disentangled the H alpha 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. Accepted for publication in MNRAS, 11 pages, 10 figures |
| Databáze: | OpenAIRE |
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