BG Tri an example of a low inclination RW Sex-type novalike

Abstract

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.

arXiv commentAccepted for publication in MNRAS, 11 pages, 10 figures

References in corpus (36)

• Gaia Data Release 2. Summary of the contents and survey properties
• The Man Behind the Curtain: X-rays Drive the UV through NIR Variability in the 2013 AGN Outburst in NGC 2617
• Estimating distances from parallaxes IV: Distances to 1.33 billion stars in Gaia Data Release 2
• The VizieR database of Astronomical Catalogues
• First Results from the Catalina Real-time Transient Survey
• The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0
• The disc instability model of dwarf-novae and low-mass X-ray binary transients
• The Infrared Telescope Facility (IRTF) Spectral Library: Cool Stars
• The Pan-STARRS1 Surveys
• Catalogue of cataclysmic binaries, low-mass X-ray binaries and related objects (Seventh edition)
• The Evolution of Cataclysmic Variables as Revealed by their Donor Stars
• Northern Sky Variability Survey (NSVS): Public data release
• A Three-Dimensional Map of Milky-Way Dust
• Revised Catalog of GALEX Ultraviolet Sources. I. The All-sky Survey: GUVcat_AIS
• The Donor Stars of Cataclysmic Variables
• Post-common-envelope binaries from SDSS. XI: The white dwarf mass distributions of CVs and pre-CVs
• Cataclysmic Variable Primary Effective Temperatures: Constraints on Binary Angular Momentum Loss
• A review of the disc instability model for dwarf novae, soft X-ray transients and related objects
• Modeling the Spectral Signatures of Accretion Disk Winds: A New Monte Carlo Approach
• An empirical template library of stellar spectra for a wide range of spectral classes, luminosity classes, and metallicities using SDSS BOSS spectra
• SW Sextantis stars: the dominant population of CVs with orbital periods between 3-4 hours
• The Impact of Accretion Disk Winds on the Optical Spectra of Cataclysmic Variables
• Detached cataclysmic variables are crossing the orbital period gap
• Spectroscopic search for new SW Sextantis stars in the 3-4 hour orbital period range -- I
• The SW Sex enigma
• The structure of accretion flows in nova-like cataclysmic variables: RW Sextantis and 1RXS J064434.5+334451
• Structure of accretion flows in the nova-like cataclysmic variable RW Tri
• 3D modelling of accretion disc in eclipsing binary system V1239 Her
• A MeerKAT Survey of Nearby Novalike Cataclysmic Variables
• On the SW Sex-Type Eclipsing Cataclysmic Variable SDSS0756+0858
• Discovery of a new classical nova shell around a nova-like cataclysmic variable
• When the disc's away, the stars will play: dynamical masses in the nova-like variable KR Aur with a pinch of accretion
• Catching VY Sculptoris in a low state
• Doppler Tomography and Photometry of the Cataclysmic Variable 1RXS J064434.5+334451
• Quest for the Donor Star in the Magnetic Precataclysmic Variable V1082 Sgr
• On the M_V -- Inclination Relationship for Nova-like Variables

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