DAY-SIDE z'-BAND EMISSION AND ECCENTRICITY OF WASP-12b
- Carnegie Institution of Washington, Department of Terrestrial Magnetism, 5241 Broad Branch Road NW, Washington, DC 20015 (United States)
- Department of Astronomy, New Mexico State University, Las Cruces, NM 88003 (United States)
- Astrophysics Group, School of Physics, University of Exeter, Stocker Road, Exeter, Ex4 4QL (United Kingdom)
- Department of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton, NJ 08544 (United States)
- Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States)
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{sup +0.0072}{sub -0.0061}, consistent with an orbital eccentricity of |ecos {omega}| = 0.016{sup +0.011}{sub -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.
- OSTI ID:
- 21451123
- Journal Information:
- Astrophysical Journal Letters, Vol. 716, Issue 1; Other Information: DOI: 10.1088/2041-8205/716/1/L36; ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
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