DAY-SIDE z ′-BAND EMISSION AND ECCENTRICITY OF WASP-12b
Author(s)Lopez-Morales, Mercedes; Coughlin, Jeffrey L.; Sing, David K.; Burrows, Adam; Apai, Dániel; Rogers, Justin C.; Spiegel, David S.; Adams, Elisabeth Rose; ... Show more Show less
MetadataShow full item record
We report the detection of the eclipse of the very hot Jupiter WASP-12b via z'-band time-series photometry obtained with the 3.5 m Astrophysical Research Consortium telescope at Apache Point Observatory. We measure a decrease in flux of 0.082% ± 0.015% during the passage of the planet behind the star. That planetary flux is equally well reproduced by atmospheric models with and without extra absorbers, and blackbody models with f ≥ 0.585 ± 0.080. It is therefore necessary to measure the planet at other wavelengths to further constrain its atmospheric properties. The eclipse appears centered at phase phi = 0.5100+0.0072 –0.0061, consistent with an orbital eccentricity of |ecos ω| = 0.016+0.011 –0.009 (see note at the end of Section 4). If the orbit of the planet is indeed eccentric, the large radius of WASP-12b can be explained by tidal heating.
DepartmentMassachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Institute of Physics/American Astronomical Society
López-Morales, Mercedes, Jeffrey L. Coughlin, David K. Sing, Adam Burrows, Dániel Apai, Justin C. Rogers, David S. Spiegel, and Elisabeth R. Adams. “ DAY-SIDE z ′-BAND EMISSION AND ECCENTRICITY OF WASP-12b .” The Astrophysical Journal 716, no. 1 (May 20, 2010): L36–L40. © 2010 American Astronomical Society.
Final published version