K2-139 b: a low-mass warm Jupiter on a 29-day orbit transiting an active K0 V star

O. Barragán, D. Gandolfi, A. M. S. Smith +27

We announce the discovery of K2-139 b (EPIC 218916923 b), a transiting warm-Jupiter ($T_{\mathrm{eq}}$=547$\pm$25 K) on a 29-day orbit around an active (log $R_{\mathrm{HK}}^{\prime }$ =…