$Spitzer$ Parallax of OGLE-2018-BLG-0596: A Low-mass-ratio Planet around an M-dwarf

Youn Kil Jung, Andrew Gould, Andrzej Udalski +63

We report the discovery of a $Spitzer$ microlensing planet OGLE-2018-BLG-0596Lb, with preferred planet-host mass ratio $q\sim 2\times 10^{-4}$. The planetary signal, which is chara…