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VARIABLE RADIO EMISSION FROM THE YOUNG STELLAR HOST OF A HOT JUPITER

2016; IOP Publishing; Volume: 830; Issue: 2 Linguagem: Inglês

10.3847/0004-637x/830/2/107

1538-4357

Geoffrey C. Bower, Laurent Loinard, Sergio A. Dzib, P. A. B. Galli, Gisela N. Ortiz-León, C. Moutou, J.‐F. Donati,

Gamma-ray bursts and supernovae

We report the discovery of variable radio emission associated with the T Tauri star, V830 Tau, which was recently shown to host a hot Jupiter companion. Very Large Array observations at a frequency of 6 GHz reveal a detection on 01 May 2011 with a flux density $919 \pm 26\ \mu$Jy, along with non-detections in two other epochs at $<66$ and $ }{\scriptstyle \sim}} 30$ G, and is likely driven by an energetic event such as magnetic reconnection that accelerated electrons. With the limited data we have, we are not able to place any constraint on the relationship between the radio emission and the rotational or orbital properties of V830 Tau. This is the first detection of radio emission from a non-degenerate star known to host an exoplanet.