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Hunting for hot Jupiters around young stars

Published online by Cambridge University Press:  12 September 2017

Louise Yu  and
the MaTYSSE collaboration
Louise Yu
Affiliation:
Université de Toulouse, UPS-OMP, IRAP, 14 avenue E. Belin, Toulouse, F–31400France CNRS, IRAP / UMR 5277, Toulouse, 14 avenue E. Belin, F–31400France email: louise.yu@irap.omp.eu
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Abstract

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This conference paper reports the recent discoveries of two hot Jupiters (hJs) around weak-line T Tauri stars (wTTS) V830 Tau and TAP 26, through the analysis of spectropolarimetric data gathered within the Magnetic Topologies of Young Stars and the Survival of massive close-in Exoplanets (MaTYSSE) observation programme. HJs are thought to form in the outskirts of protoplanetary discs, then migrate inwards close to their host stars as a result of either planet-disc type II migration or planet-planet scattering. Looking for hJs around young forming stars provides key information on the nature and time scale of such migration processes, as well as how their migration impacts the subsequent architecture of their planetary system. Young stars are however extremely active, to the point that their radial velocity (RV) jitter is around an order of magnitude larger than the potential signatures of close-in gas giants, making them difficult to detect with velocimetry. Three techniques to filter out this activity jitter are presented here, two using Zeeman Doppler Imaging (ZDI) and one using Gaussian Process Regression (GPR).

Keywords

methods: statisticalstars: activitystars: evolutionstars: imagingstars: individual (V830 Tau, TAP 26)stars: magnetic fields(stars:) planetary systems: formationstars: pre–main-sequencestars: rotationstars: spots
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S328: Living Around Active Stars , October 2016 , pp. 282 - 289
Copyright
Copyright © International Astronomical Union 2017 

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