SPITZER SECONDARY ECLIPSES OF WASP-18b
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...
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| Veröffentlicht in: | The Astrophysical journal 2011-11, Vol.742 (1) |
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| creator | Nymeyer, Sarah Harrington, Joseph Hardy, Ryan A. Stevenson, Kevin B. Campo, Christopher J. Blecic, Jasmina Bowman, William C. Britt, Christopher B. T. Cubillos, Patricio Madhusudhan, Nikku Collier-Cameron, Andrew Maxted, Pierre F. L. Loredo, Thomas J. Hellier, Coel Anderson, David R. Gillon, Michael Hebb, Leslie Wheatley, Peter J. Pollacco, Don |
| description | 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. |
| doi_str_mv | 10.1088/0004-637X/742/1/35;COUNTRYOFINPUT:INTERNATIONALATOMICENERGYAGENCY(IAEA) |
| format | Article |
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| source | Institute of Physics Open Access Journal Titles; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| subjects | ALBEDO ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ATMOSPHERES BRIGHTNESS CAMERAS ECLIPSE OPTICAL PROPERTIES PHYSICAL PROPERTIES PLANETS SATELLITE ATMOSPHERES STARS TEMPERATURE INVERSIONS WAVELENGTHS |
| title | SPITZER SECONDARY ECLIPSES OF WASP-18b |
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