The magnetosphere of the close accreting PMS binary V4046 Sgr
Abstract
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.
Citation
Gregory , S G , Holzwarth , V R , Donati , J-F , Hussain , G A J , Montmerle , T , Alecian , E , Alencar , S H P , Argiroffi , C , Audard , M , Bouvier , J , Damiani , F , Güdel , M , Huenemoerder , D P , Kastner , J H , Maggio , A , Sacco , G G & Wade , G A 2014 , ' The magnetosphere of the close accreting PMS binary V4046 Sgr ' , EPJ Web of Conferences , vol. 64 , 08009 . https://doi.org/10.1051/epjconf/20136408009
Publication
EPJ Web of Conferences
Status
Peer reviewed
ISSN
2100-014XType
Journal article
Description
SGG acknowledges support from the Science & Technology Facilities Council (STFC) via an Ernest Rutherford Fellowship [ST/J003255/1]. GAW is supported by a Discovery Grant from the Natural Science & Engineering Research Council of Canada (NSERC).Collections
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