The search for double transit planetary systems opens new possibilities for the transit searches and for studies of orbital stability , stellar irradiation , and migration scenarios , among others .
We explore the OGLE lightcurves of stars with confirmed planetary companions ( OGLE-TR-10 , OGLE-TR-56 , OGLE-TR-111 , OGLE-TR-113 , and OGLE-TR-132 ) , searching for additional transits .
The most promising candidate is OGLE-TR-111 , where the photometric measurements and the radial velocities are consistent with the presence of a second planet .
If confirmed , OGLE-TR-111 would be the first extrasolar planetary system detected by transits .
The parameters of the possible new planet OGLE-TR-111c would be : period P = 16.0644 ~ { } d , semimajor axis a = 0.12 ~ { } AU , orbital inclination i = 88 - 89 ~ { } deg , mass M = 0.7 ~ { } M _ { J } , radius R = 0.85 ~ { } R _ { J } , density \rho = 1.4 ~ { } g / cm ^ { 3 } .
If confirmed , OGLE-TR-111c would be the smallest and densest extrasolar planet measured todate , truly a Jovian planet , with properties intermediate between Jupiter and Saturn , albeit with shorter period .
Additional photometric and spectroscopic data would allow to discriminate between a second transiting planet around OGLE-TR-111 and a false positive detection .
Stars : individual ( OGLE-TR-111 ) – Extrasolar planets