6533b829fe1ef96bd128afd4
RESEARCH PRODUCT
The magnetosphere of the close accreting PMS binary V4046 Sgr
G. A. J. HussainManuel GüdelJoel H. KastnerAntonio MaggioEvelyne AlecianJean-françois DonatiGregg A. WadeThierry MontmerleG. G. SaccoCostanza ArgiroffiScott G. GregoryF. DamianiDavid P. HuenemoerderVolkmar HolzwarthJerome BouvierMarc AudardSilvia H. P. Alencarsubject
accretion young starsQC1-999Astrophysics::High Energy Astrophysical PhenomenaMagnetosphereBinary numberFOS: Physical sciencesAstrophysics01 natural scienceslaw.inventionTelescopeSettore FIS/05 - Astronomia E Astrofisicalaw0103 physical sciencesAstrophysics::Solar and Stellar Astrophysics010303 astronomy & astrophysicsQCAstrophysics::Galaxy AstrophysicsSolar and Stellar Astrophysics (astro-ph.SR)Physics010308 nuclear & particles physicsPhysicsMagnetic fieldDipoleStarsT Tauri starQC PhysicsAstrophysics - Solar and Stellar AstrophysicsAstrophysics::Earth and Planetary AstrophysicsCircumbinary planetdescription
V4046 Sagittarii AB is a close short-period classical T Tauri binary. It is a circularised and synchronised system accreting from a circumbinary disk. In 2009 it was observed as part of a coordinated program involving near-simultaneous spectropolarimetric observations with ESPaDOnS at the Canada-France-Hawai'i Telescope and high-resolution X-ray observations with XMM-Newton. Magnetic maps of each star were derived from Zeeman-Doppler imaging. After briefly highlighting the most significant observational findings, we present a preliminary 3D model of the binary magnetosphere constructed from the magnetic maps using a newly developed binary magnetic field extrapolation code. The large-scale fields (the dipole components) of both stars are highly tilted with respect to their rotation axes, and their magnetic fields are linked.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-08-31 |