A large rotating structure around AB Doradus A at VLBI scale
2019 ◽
Vol 15
(S354)
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pp. 189-194
Keyword(s):
AbstractWe 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.
2013 ◽
Vol 768
(1)
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pp. 74
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2018 ◽
Vol 18
(1)
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pp. 79-89
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2006 ◽
Vol 327
(4)
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pp. 328-334
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1978 ◽
Vol 183
(4)
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pp. 687-700
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1989 ◽
Vol 107
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pp. 376-376
Keyword(s):
2019 ◽
Vol 491
(3)
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pp. 4069-4075
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