6533b7d8fe1ef96bd126b71e
RESEARCH PRODUCT
The Be/X-ray Transient V0332+53: Evidence for a tilt between the orbit and the equatorial plane?
Ignacio NegueruelaPaul RocheM. J. CoeJuan Fabregatsubject
PhysicsOrbital planeX-ray transientInfraredAstrophysics::High Energy Astrophysical PhenomenaAstrophysics (astro-ph)Quiescent stateFOS: Physical sciencesAstronomy and AstrophysicsAstrophysicsCircumstellar envelopeAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsAccretion (astrophysics)WavelengthSpace and Planetary ScienceAstrophysics::Solar and Stellar AstrophysicsAstrophysics::Earth and Planetary AstrophysicsSpectroscopyAstrophysics::Galaxy Astrophysicsdescription
We present optical and infrared observations of BQ Cam, the optical counterpart to the Be/X-ray transient system V0332+53. BQ Cam is shown to be an O8-9Ve star, which places V0332+53 at a distance of ~7 kpc. H-alpha spectroscopy and infrared photometry are used to discuss the evolution of the circumstellar envelope. Due to the low inclination of the system, parameters are strongly constrained. We find strong evidence for a tilt of the orbital plane with respect to the circumstellar disc (pressumably on the equatorial plane). Even though the periastron distance is only ~ 10 R_*, during the present quiescent state the circumstellar disc does not extend to the distance of periastron passage. Under these conditions, X-ray emission is effectively prevented by centrifugal inhibition of accretion. The circumstellar disc is shown to be optically dense at optical and infrared wavelengths, which together with its small size, is taken as an indication of tidal truncation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1999-03-15 |