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The magnetosphere of the close accreting PMS binary V4046 Sgr

Authors :: G. A. J. Hussain
Manuel Güdel
Joel H. Kastner
Antonio Maggio
Evelyne Alecian
Jean-François Donati
Gregg A. Wade
Thierry Montmerle
G. G. Sacco
Costanza Argiroffi
Scott G. Gregory
F. Damiani
David P. Huenemoerder
Volkmar Holzwarth
Jerome Bouvier
Marc Audard
Silvia H. P. Alencar
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
Science & Technology Facilities Council
University of St Andrews. University of St Andrews
University of St Andrews. School of Physics and Astronomy
Source :: EPJ Web of Conferences, Vol 64, p 08009 (2014)
Publication Year :: 2013
Publisher :: arXiv, 2013.
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.<br />Comment: Proceedings of the "Physics at the Magnetospheric Boundary" conference, Geneva, June 2013