High-contrast, high-angular resolution view of the GJ 367 exoplanet system

We search for additional companions in the GJ 367 exoplanet system, and aim at better constraining its age evolutionary status. analyse high contrast direct imaging observations obtained with HST/NICMOS, VLT/NACO, VLT/SPHERE. investigate critically discuss conflicting indicators based on theoretical isochrones models Galactic dynamics. A comparison of GAIA EDR3 parallax photometric measurements suggest a young $\le$60 Myr 367. The star's kinematics exclude membership to any nearby moving group or stellar stream. Its highly eccentric orbit, however, is atypical star. Age estimates considering dynamical evolution are most consistent an 1 8 Gyr. find no evidence significant mid-infrared excess WISE bands, suggesting absence warm dust system. data provide significantly improved detection limits compared previous studies. At 530 mas (5 au) separation, SPHERE achieve 5 sigma $2.6 \times 10^{-6}$. presence companion projected separations $\ge$0.4 au. $\ge$5 au we can substellar mass $\ge$ 1.5 M$_{\rm Jup}$ 50 Myr, 20 By applying parameters corresponding isochrone, derive bulk density $\rho_{\rm planet} = 6.2$ g/cm$^3$ 367b, which 25% smaller than estimate.