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Atmospheric Characterization of the Hot Jupiter Kepler-13Ab

Author(s): Shporer, Avi; O Rourke, Joseph G; Knutson, Heather A.; Szabó, Gyula M; Zhao, Ming; et al

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dc.contributor.authorShporer, Avi-
dc.contributor.authorO Rourke, Joseph G-
dc.contributor.authorKnutson, Heather A.-
dc.contributor.authorSzabó, Gyula M-
dc.contributor.authorZhao, Ming-
dc.contributor.authorBurrows, Adam S.-
dc.contributor.authorFortney, Jonathan J.-
dc.contributor.authorAgol, Eric-
dc.contributor.authorCowan, Nicolas B-
dc.contributor.authorDésert, Jean-Michel-
dc.contributor.authorHoward, Andrew W-
dc.contributor.authorIsaacson, Howard-
dc.contributor.authorLewis, Nikole K-
dc.contributor.authorShowman, Adam P-
dc.contributor.authorTodorov, Kamen O.-
dc.date.accessioned2019-04-10T19:30:51Z-
dc.date.available2019-04-10T19:30:51Z-
dc.date.issued2014-06-10en_US
dc.identifier.citationShporer, Avi, O Rourke, Joseph G, Knutson, Heather A, Szabó, Gyula M, Zhao, Ming, Burrows, Adam, Fortney, Jonathan, Agol, Eric, Cowan, Nicolas B, Desert, Jean-Michel, Howard, Andrew W, Isaacson, Howard, Lewis, Nikole K, Showman, Adam P, Todorov, Kamen O. (2014). Atmospheric Characterization of the Hot Jupiter Kepler-13Ab. apj, 788 (92 - 92. doi:10.1088/0004-637X/788/1/92en_US
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr17h84-
dc.description.abstractKepler-13Ab (=KOI-13.01) is a unique transiting hot Jupiter. It is one of very few known short-period planets orbiting a hot A-type star, making it one of the hottest planets currently known. The availability of Kepler data allows us to measure the planet’s occultation (secondary eclipse) and phase curve in the optical, which we combine with occultations observed by warm Spitzer at 4.5μm and 3.6μm and a ground-based occultation observation in the Ks band (2.1μm). We derive a day-side hemisphere temperature of 2750±160 K as the effective temperature of a black body showing the same occultation depths. Comparing the occultation depths with one-dimensional planetary atmosphere models suggests the presence of an atmospheric temperature inversion. Our analysis shows evidence for a relatively high geometric albedo, Ag=0.33+0.04−0.06. While measured with a simplistic method, a high Ag is supported also by the fact that the one-dimensional atmosphere models underestimate the occultation depth in the optical. We use stellar spectra to determine the dilution, in the four wide bands where occultation was measured, due to the visual stellar binary companion 1.′′15±0.′′05 away. The revised stellar parameters measured using these spectra are combined with other measurements, leading to revised planetary mass and radius estimates of Mp=4.94–8.09MJ and Rp=1.406±0.038RJ. Finally, we measure a Kepler midoccultation time that is 34.0±6.9 s earlier than expected based on the midtransit time and the delay due to light-travel time and discuss possible scenarios.en_US
dc.language.isoen_USen_US
dc.relation.ispartofAstrophysical Journalen_US
dc.rightsFinal published version. This is an open access article.en_US
dc.titleAtmospheric Characterization of the Hot Jupiter Kepler-13Aben_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.1088/0004-637X/788/1/92-
dc.date.eissued2014-05-27en_US
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

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