Hot Jupiter OGLE-TR-113b's Orbital is NOT Quickly Decaying

TraMoS IV: Discarding the Quick Orbital Decay Hypothesis for OGLE-TR-113b

Authors:

Hoyer et al

Abstract:

In the context of the TraMoS project we present nine new transit observations of the exoplanet OGLE-TR-113b observed with the Gemini South, Magellan Baade, Danish-1.54m and SOAR telescopes. We perform a homogeneous analysis of these new transits together with ten literature transits to probe into the potential detection of an orbital decay for this planet reported by \citet{adams2010}. Our new observations extend the transit monitoring baseline for this system by 6 years, to a total of more than 13 years. With our timing analysis we obtained a P˙=−1.0±6.0 ms~yr−1, which rejects previous hints of a larger orbital decay for OGLE-TR-113b. With our updated value of P˙ we can discard tidal quality factors of Q less than 10^5 for its host star. Additionally, we calculate a 1σ dispersion of the Transit Timing Variations (TTVs) of 42 seconds over the 13 years baseline, which discards additional planets in the system more massive than 0.5−3.0 M⊕ in 1:2, 5:3, 2:1 and 3:1 Mean Motion Resonances with OGLE-TR-113b. Finally, with the joint analysis of the 19 light curves we update transit parameters, such as the relative semi-major axis a/Rs=6.44+0.04−0.05, the planet-to-star radius ratio Rp/Rs=0.14436+0.00096−0.00088, and constrains its orbital inclination to i=89.27+0.51−0.68~degrees.