Six High-Precision Transits of Ogle-Tr-113b
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Author(s)
Adams, Elisabeth Rose
Lopez-Morales, Mercedes
Elliot, James L.
Seager, Sara
Osip, David J.
Date Issued
September 2010
Journal
Astrophysical Journal
Publisher
IOP Publishing
Citation
Adams, E. R. et al. “Six High-Precision Transits of Ogle-Tr-113b.” The Astrophysical Journal 721.2 (2010): 1829–1834.
Version
Author's final manuscript
Abstract
We present six new transits of the hot Jupiter OGLE-TR-113b observed with MagIC on the Magellan
Telescopes between 2007 January and 2009 May. We update the system parameters and revise the planetary radius to R[subscript p] = 1.084 ± 0.029R[subscript J] , where the error is dominated by stellar radius uncertainties. The new transit midtimes reveal no transit timing variations from a constant ephemeris of greater than 13 ± 28 s over two years, placing an upper limit of 1–2M[subscript ⊕] on the mass of any perturber in a 1:2 or 2:1 mean-motion resonance with OGLETR-
113b. Combining the new transit epochs with five epochs published between 2002 and 2006, we find hints that the orbital period of the planet may not be constant, with the best fit indicating a decrease of [dot over P] = −60±15 ms yr−1. If real, this change in period could result from either a long-period (more than eight years) timing variation due to a massive external perturber or more intriguingly from the orbital decay of the planet. The detection of a changing period is still tentative and requires additional observations, but if confirmed it would enable direct tests of tidal stability and dynamical models of close-in planets.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1088/0004-637x/721/2/1829
