OGLE-2019-BLG-0362Lb: A super-Jovian-mass planet around a low-mass star

Abstract

We present the analysis of a planetary microlensing event OGLE-2019-BLG-0362 with a short-duration anomaly $(\sim 0.4\mathrm{days})$ near the peak of the light curve, which is caused by the resonant caustic. The event has a severe degeneracy with $\hat{I}”\ddot{I}{‡}^2=0.9$ between the close and the wide binary lens models both with planet-host mass ratio $q\simeq 0.007$. We measure the angular Einstein radius but not the microlens parallax, and thus we perform a Bayesian analysis to estimate the physical parameters of the lens. We find that the OGLE-2019-BLG-0362L system is a super-Jovian-mass planet $M_{\mathrm{p}}=3.26_{-0.58}^{+0.83}{M}_{\mathrm{J}}$ orbiting an M dwarf $M_{\mathrm{h}}=0.42_{-0.23}^{+0.34}{M}_{\odot }$ at a distance $D_{\mathrm{L}}=5.83_{-1.55}^{+1.04}\mathrm{kpc}$. The projected star-planet separation is $a_{\perp }=2.18_{-0.72}^{+0.58}\mathrm{AU}$, which indicates that the planet lies beyond the snow line of the host star.

8 pages, 5 figures, Accepted in JKAS