The high-albedo, low polarization disk around HD 114082 that harbors a Jupiter-sized transiting planet. Constraints from VLT/SPHERE completed with TESS, Gaia, and radial velocities ; Disque à fort albédo et faible polarisation autour de HD 114082 abritant une planète en transit de la taille de Jupiter. Contraintes du VLT/SPHERE complétées par TESS, Gaia et les vitesses radiales

International audience ; We present new optical and near-infrared images of the debris disk around the F-type star HD 114082 in the Scorpius-Centaurus OB association. We obtained direct imaging observations and analyzed the TESS photometric time series data of this target with the goal of searching for planetary companions to HD 114082 and characterizing the morphology of the debris disk and the scattering properties of dust particles. Methods. HD 114082 was observed with the VLT/SPHERE instrument in different modes-the IRDIS camera in the K band (2.0 − 2.3 µm) together with the IFS in the Y, J, and H band (0.95 − 1.66 µm) using the angular differential imaging technique as well as IRDIS in the H band (1.5 − 1.8 µm) and ZIMPOL in the I_PRIME band (0.71 − 0.87 µm) using the polarimetric differential imaging technique. To constrain the basic geometrical parameters of the disk and the scattering properties of dust grains, scattered light images were fitted with a 3D model for single scattering in an optically thin dust disk using a Markov chain Monte Carlo approach. We performed aperture photometry to derive the scattering and polarized phase functions, the polarization fraction, and the spectral scattering albedo for the dust particles in the disk. This method was also used to obtain the reflectance spectrum of the disk and, in turn, to retrieve the disk color and study the dust reflectivity in comparison to the debris disk HD 117214. We also performed the modeling of the HD 114082 light curve measured by TESS using models for planet transit and stellar activity to put constraints on the radius of the detected planet and its orbit. Last, we searched for additional planets in the system by combining archival radial velocity data, astrometry, and direct imaging. Results. The debris disk HD 114082 appears as an axisymmetric debris belt with a radius of ∼0.37 ′′ (35 au), an inclination of ∼83 • , and a wide inner cavity. Dust particles in HD 114082 have a maximum polarization fraction of ∼17% and a higher reflectivity ...