Time-lapse Very Long Baseline Interferometry Imaging of the Close Active Binary HR 1099
Walter W. Golay,
Robert L. Mutel,
Evan E. Abbuhl
Abstract:We report multiepoch astrometric very long baseline interferometry observations of the chromospherically active binary HR 1099 (V711 Tau, HD 22468) at six epochs over 63 days using the Very Long Baseline Array at 22.2 GHz. We determined hourly radio positions at each epoch with a positional uncertainty significantly smaller than the component separation. The aggregate radio positions at all epochs define an ellipse in the comoving reference frame with an inclination
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