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- Title
A large rotating structure around AB Doradus A at VLBI scale.
- Authors
Climent, J. B.; Guirado, J. C.; Azulay, R.; Marcaide, J. M.; Kosovichev, Alexander; Strassmeier, Klaus; Jardine, Moira
- Abstract
We report the results of three VLBI observations of the pre-main-sequence star AB Doradus A at 8.4 GHz. With almost three years between consecutive observations, we found a complex structure at the expected position of this star for all epochs. Maps at epochs 2007 and 2010 show a double core-halo morphology while the 2013 map reveals three emission peaks with separations between 5 and 18 stellar radii. Furthermore, all maps show a clear variation of the source structure within the observing time. We consider a number of hypothesis in order to explain such observations, mainly: magnetic reconnection in loops on the polar cap, a more general loop scenario and a close companion to AB Dor A.
- Publication
Proceedings of the International Astronomical Union, 2019, Vol 15, Issue S354, p189
- ISSN
1743-9213
- Publication type
Article
- DOI
10.1017/S1743921319009785