Direct Imaging discovery of a second planet candidate around the possibly transiting planet host CVSO 30
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We surveyed the 25 Ori association for direct-imaging companions. This association has an age of only few million years. Among other targets, we observed CVSO 30, which has recently been identified as the first T Tauri star found to host a transiting planet candidate. We report on photometric and spectroscopic high-contrast observations with the Very Large Telescope, the Keck telescopes, and the Calar Alto observatory. They reveal a directly imaged planet candidate close to the young M3 star CVSO 30. The JHK-band photometry of the newly identified candidate is at better than 1 sigma consistent with late-type giants, early-T and early-M dwarfs, and free-floating planets. Other hypotheses such as galaxies can be excluded at more than 3.5 sigma. A lucky imaging z' photometric detection limit z'= 20.5 mag excludes early-M dwarfs and results in less than 10 MJup for CVSO 30 c if bound. We present spectroscopic observations of the wide companion that imply that the only remaining explanation for the object is that it is the first very young (
Schmidt , T O B , Neuhäuser , R , Briceño , C , Vogt , N , Raetz , S , Seifahrt , A , Ginski , C , Mugrauer , M , Buder , S , Adam , C , Hauschildt , P H , Witte , S , Helling , C & Schmitt , J H M M 2016 , ' Direct Imaging discovery of a second planet candidate around the possibly transiting planet host CVSO 30 ' Astronomy & Astrophysics , vol 593 , A75 . DOI: 10.1051/0004-6361/201526326
Astronomy & Astrophysics
© 2016, ESO. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at www.aanda.org / http://dx.doi.org/10.1051/0004-6361/201526326
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