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2010MNRAS.402.1426D - Mon. Not. R. Astron. Soc., 402, 1426-1436 (2010/March-1)
Complex magnetic topology and strong differential rotation on the low-mass T Tauri star V2247 Oph.
DONATI J.-F., SKELLY M.B., BOUVIER J., JARDINE M.M., GREGORY S.G., MORIN J., HUSSAIN G.A.J., DOUGADOS C., MENARD F. and UNRUH Y.
Abstract (from CDS):
During our observations, V2247 Oph was in a low-accretion state, with emission lines showing only weak levels of circular polarization; we nevertheless find that excess emission apparently concentrates in a mid-latitude region of a strong radial field, suggesting that it is the footpoint of an accretion funnel.
The weaker and more complex field that we report on V2247 Oph may share similarities with those of very-low-mass late-M dwarfs and potentially explain why low-mass cTTSs rotate on average faster than intermediate-mass ones. These surprising results need confirmation from new independent data sets on V2247 Oph and other similar low-mass cTTSs.
Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS
Journal keyword(s): techniques: polarimetric - stars: formation - stars: imaging - stars: individual: V2247 Oph - stars: magnetic fields - stars: rotation
Simbad objects: 6
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