Searching for planets in southern stars via transit timing variations

JOFRE, E

Pasadena

Workshop; 2016 Sagan Exoplanet Summer Workshop; 2016

Caltech

Transit timing variations (TTVs) has become one of the most promising techniques not only to confirm and characterize transiting planets, but also to discover additional planetary-mass bodies in these systems. Given the relevance of this method, since June 2011 we are carrying out a photometric follow-up campaing of southern stars with transiting planets aiming to search for periodic TTVs that could be the result of gravitational interaction with undetected bodies around these stars. For this project we are employing three 0.40-2.15 m telescopes located at CASLEO and EABA in Argentina. In this contribution we summarize the results of this project for two objects and also present the preliminary TTV analysis for a short-period giant planet orbiting an active main-sequence star.