Radial velocity survey for planets around young stars (RVSPY): A transiting warm super-Jovian planet around HD 114082, a young star with a debris disk

Olga V. Zakhozhay, Ralf Launhardt, Trifon Trifonov, Martin Kürster, Sabine Reffert, Thomas Henning, Rafael Brahm, José I. Vinés, Gabriel Dominique Marleau, Jayshil A. Patel

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Aims. We aim to detect planetary companions to young stars with debris disks via the radial velocity method. Methods. We observed HD 114082 during April 2018- August 2022 as one of the targets of our RVSPY program (Radial Velocity Survey for Planets around Young stars). We use the FEROS spectrograph, mounted to the MPG/ESO 2.2 m telescope in Chile, to obtain high signal-to-noise spectra and time series of precise radial velocities (RVs). Additionally, we analyze archival HARPS spectra and TESS photometric data. We use the CERES, CERES++ and SERVAL pipelines to derive RVs and activity indicators and ExoStriker for the independent and combined analysis of the RVs and TESS photometry. Results. We report the discovery of a warm super-Jovian companion around HD 114082 based on a 109.8±0.4 day signal in the combined RV data from FEROS and HARPS, and on one transit event in the TESS photometry. The best-fit model indicates a 8.0±1.0 MJup companion with a radius of 1.00±0.03RJup in an orbit with a semi-major axis of 0.51±0.01 au and an eccentricity of 0.4±0.04. The companions orbit is in agreement with the known near edge-on debris disk located at 28 au. HD 114082 b is possibly the youngest (15±6 Myr), and one of only three young (< 100 Myr) giant planetary companions for which both their mass and radius have been determined observationally. It is probably the first properly model-constraining giant planet that allows distinguishing between hot and cold-start models. It is significantly more compatible with the cold-start model.

Original languageEnglish
Article numberL14
JournalAstronomy and Astrophysics
Volume667
Issue number102
DOIs
StatePublished - 1 Nov 2022
Externally publishedYes

Keywords

  • Methods: observational
  • Planets and satellites: detection
  • Planets and satellites: formation
  • Stars: activity
  • Techniques: photometric
  • Techniques: radial velocities

Fingerprint

Dive into the research topics of 'Radial velocity survey for planets around young stars (RVSPY): A transiting warm super-Jovian planet around HD 114082, a young star with a debris disk'. Together they form a unique fingerprint.

Cite this