8 papers
WASP-8b: Characterization of a Cool and Eccentric Exoplanet with Spitzer
Patricio Cubillos, Joseph Harrington, Nikku Madhusudhan +6
WASP-8b has 2.18 times Jupiter's mass and is on an eccentric () 8.16-day orbit. With a time-averaged equilibrium temperature of 948 K, it is one of the least-irradiated hot…
Two nearby sub-Earth-sized exoplanet candidates in the GJ 436 system
Kevin B. Stevenson, Joseph Harrington, Nate B. Lust +8
We report the detection of UCF-1.01, a strong exoplanet candidate with a radius 0.66 +/- 0.04 times that of Earth (R_{\oplus}). This sub-Earth-sized planet transits the nearby M-dw…
Thermal emission at 3.6-8 micron from WASP-19b: a hot Jupiter without a stratosphere orbiting an active star
D. R. Anderson, A. M. S. Smith, N. Madhusudhan +12
We report detection of thermal emission from the exoplanet WASP-19b at 3.6, 4.5, 5.8 and 8.0 micron. We used the InfraRed Array Camera on the Spitzer Space Telescope to observe two…
Thermal Emission of WASP-14b Revealed with Three Spitzer Eclipses
Jasmina Blecic, Joseph Harrington, Nikku Madhusudhan +10
Exoplanet WASP-14b is a highly irradiated, transiting hot Jupiter. Joshi et al. calculate an equilibrium temperature Teq of 1866 K for zero albedo and reemission from the entire pl…
Thermal emission at 4.5 and 8 micron of WASP-17b, an extremely large planet in a slightly eccentric orbit
D. R. Anderson, A. M. S. Smith, A. A. Lanotte +10
We report the detection of thermal emission at 4.5 and 8 micron from the planet WASP-17b. We used Spitzer to measure the system brightness at each wavelength during two occultation…
High C/O Ratio and Weak Thermal Inversion in the Very Hot Atmosphere of Exoplanet WASP-12b
Nikku Madhusudhan, Joseph Harrington, Kevin B. Stevenson +16
The carbon-to-oxygen ratio (C/O) in a planet provides critical information about its primordial origins and subsequent evolution. A primordial C/O greater than 0.8 causes a carbide…