Abstract
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 (
Original language | English |
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Article number | A75 |
Journal | Astronomy & Astrophysics |
Volume | 593 |
Early online date | 26 May 2016 |
DOIs | |
Publication status | Published - Sept 2016 |
Keywords
- Stars: pre-main sequence
- Stars: low mass
- Planetary systems
- Planets and satellites: detection
- Planets and satellites: atmospheres
- Planets and satellites: formation