The magnetosphere of the close accreting PMS binary V4046 Sgr
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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.
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 . DOI: 10.1051/epjconf/20136408009
EPJ Web of Conferences
© Owned by the authors, published by EDP Sciences, 2014. This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. http://creativecommons.org/licenses/by/2.0/
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).
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