2013/08/31 by S. G. Gregory, V. R. Holzwarth, V. Holzwarth +19
Physics and Astronomy · #Accretion (finance) #Astro and Planetary Science #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Binary number #Binary star #Circumbinary planet #Extrapolation #Magnetic field #Magnetosphere #Physics #Rotation period #Stars #Stellar, planetary, and galactic studies #T Tauri star #Telescope #Zeeman effect #astro-ph.SR
paper · pdf · doi:10.1051/epjconf/20136408009
Proceedings of the "Physics at the Magnetospheric Boundary" conference, Geneva, June 2013
arxiv created 2013/08/31 · openalex publication_date 2014/01/01 · arxiv updated 2015/06/17 · openalex created_date 2019/10/03 · openalex updated_date 2026/08/05
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.