Study of TTV and TDelta_V in Transiting Planets Around Active Stars

R. PETRUCCI, E. JOFRÉ, L. FERRERO, V. CÚNEO, L. SAKER, F, LOVOS, M. GOMEZ, P., MAUAS

Córdoba

Congreso; FOF meeting 2016; 2016

IATE

In this contribution we present preliminary results of the search for transit depth and transit timing variations (TD_V and TTV, respectively) in the Jupiter like-planet orbiting the active main sequence star 2MASS J23341508-4203411. We analyze 41 and 26 TTVs and TD_Vs transits of 2MASS J23341508-4203411b, respectively. We found a relatively strong correlation (r=0.74) between the errors in the mid-transit times and PNR, suggesting that low quality light curves provide less accurate values of T0. Considering only those LCs with T0 values whose uncertainties are lesser than 1 minute, we re-determined the ephemeris of the system. We did not detect any significant periodicity neither in the depth nor in the O-C values. However in both cases many data present values above ±3s. As we mentioned before, 2MASS J23341508-4203411 is an active star, therefore it is possible that the anomalous values of k and O-C could be produced by the passage of the planet in front of one or several stellar spots. We also re-determined the photometric parameters of system, which are in good agreement with the values estimated in previous works.