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Spitzer secondary eclipses of WASP-18b
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Nymeyer, Sarah, Harrington, J. (Joseph), Hardy, Ryan A., Stevenson, Kevin B., Campo, Christopher J., Madhusudhan, Nikku, Collier-Cameron, Andrew, Loredo, Thomas J., Blecic, Jasmina, Bowman, William C., Britt, Christopher B. T., Cubillos, Patricio, Hellier, Coel, Gillon, Michael, Maxted, P. F. L., Hebb, L., Wheatley, P. J., Pollacco, Don and Anderson, D. R. (2011) Spitzer secondary eclipses of WASP-18b. Astrophysical Journal, Vol.742 (No.1). Article: 35. doi:10.1088/0004-637X/742/1/35
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Official URL: http://dx.doi.org/10.1088/0004-637X/742/1/35
Abstract
The transiting exoplanet WASP-18b was discovered in 2008 by the Wide Angle Search for Planets project. The Spitzer Exoplanet Target of Opportunity Program observed secondary eclipses of WASP-18b using Spitzer's Infrared Array Camera in the 3.6 mu m and 5.8 mu m bands on 2008 December 20, and in the 4.5 mu m and 8.0 mu m bands on 2008 December 24. We report eclipse depths of 0.30% +/- 0.02%, 0.39% +/- 0.02%, 0.37% +/- 0.03%, 0.41% +/- 0.02%, and brightness temperatures of 3100 +/- 90, 3310 +/- 130, 3080 +/- 140, and 3120 +/- 110 K in order of increasing wavelength. WASP-18b is one of the hottest planets yet discovered-as hot as an M-class star. The planet's pressure-temperature profile most likely features a thermal inversion. The observations also require WASP-18b to have near-zero albedo and almost no redistribution of energy from the day side to the night side of the planet.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | ||||
| Divisions: | Faculty of Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Planets -- Atmospheres, Satellites -- Atmospheres, Planets -- Spectra, Infrared astronomy, Astronomical spectroscopy | ||||
| Journal or Publication Title: | Astrophysical Journal | ||||
| Publisher: | IOP Publishing | ||||
| ISSN: | 0004-637X | ||||
| Official Date: | 2011 | ||||
| Dates: |
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| Volume: | Vol.742 | ||||
| Number: | No.1 | ||||
| Page Range: | Article: 35 | ||||
| DOI: | 10.1088/0004-637X/742/1/35 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | United States. National Aeronautics and Space Administration (NASA) |
Data sourced from Thomson Reuters' Web of Knowledge
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