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VLBI for probing large-scale magnetic structures of stars

Published online by Cambridge University Press:  25 May 2016

J.-F. Lestrade
J.-F. Lestrade*
Affiliation:
Observatoire de Paris-Meudon, CNRS-URA1757, F92195, Meudon, France

Abstract

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By VLBI astrometry, we show that the two RSCVn type binaries, UX Ari and σ2 CrB, have a preferred site of radio emission which is the intra-system region. It is known that radio emission from these stars is from the gyro-synchrotron process associated with large-scale magnetic fields. High gravity in the intra-system region might favor dense magnetic loops. Interactions in this region between loops attached to the surfaces of the two stellar components might produce reconnections required for electron acceleration.

Type
Session II: “Direct Mapping: The Last Frontier”
Information
Symposium - International Astronomical Union , Volume 176: Stellar Surface Structure , 1996 , pp. 173 - 180
Copyright
Copyright © Kluwer 1996 

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