Twenty-one new light curves of OGLE-TR-56b: New system parameters and limits on timing variations
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Author(s)
Adams, Elisabeth Rose
Lopes-Morales, M.
Elliot, James L.
Seager, Sara
Osip, David J.
Holman, Matthew J.
Winn, Joshua Nathan
Hoyer, S.
Rojo, P.
Date Issued
November 2011
Journal
Astrophysical Journal
Publisher
Institute of Physics Publishing
Citation
Adams, E. R. et al. “TWENTY-ONE NEW LIGHT CURVES OF OGLE-TR-56b: NEW SYSTEM PARAMETERS AND LIMITS ON TIMING VARIATIONS.” The Astrophysical Journal 741.2 (2011): 102. 12pp. Web.
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Author's final manuscript
Abstract
Although OGLE-TR-56b was the second transiting exoplanet discovered, only one light curve, observed in 2006, has been published besides the discovery data. We present 21 light curves of 19 different transits observed between 2003 July and 2009 July with the Magellan Telescopes and Gemini South. The combined analysis of the new light curves confirms a slightly inflated planetary radius relative to model predictions, with R[subscript p] = 1.378 ± 0.090 R[subscript J]. However, the values found for the transit duration, semimajor axis, and inclination values differ significantly from the previous result, likely due to systematic errors. The new semimajor axis and inclination, a = 0.01942 ± 0.00015 AU and i = 73fdg72 ± 0fdg18, are smaller than previously reported, while the total duration, T [subscript 14] = 7931 ± 38 s, is 18 minutes longer. The transit midtimes have errors from 23 s to several minutes, and no evidence is seen for transit midtime or duration variations. Similarly, no change is seen in the orbital period, implying a nominal stellar tidal decay factor of Q * = 10[superscript 7], with a 3omega lower limit of 10[superscript 5.7].
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/741/2/102
