skip to main content

Title: Thermal emission of WASP-14b revealed with three Spitzer eclipses

Exoplanet WASP-14b is a highly irradiated, transiting hot Jupiter. Joshi et al. calculate an equilibrium temperature (T {sub eq}) of 1866 K for zero albedo and reemission from the entire planet, a mass of 7.3 ± 0.5 Jupiter masses (M {sub J}), and a radius of 1.28 ± 0.08 Jupiter radii (R {sub J}). Its mean density of 4.6 g cm{sup -3} is one of the highest known for planets with periods less than three days. We obtained three secondary eclipse light curves with the Spitzer Space Telescope. The eclipse depths from the best jointly fit model are 0.224% ± 0.018% at 4.5 μm and 0.181% ± 0.022% at 8.0 μm. The corresponding brightness temperatures are 2212 ± 94 K and 1590 ± 116 K. A slight ambiguity between systematic models suggests a conservative 3.6 μm eclipse depth of 0.19% ± 0.01% and brightness temperature of 2242 ± 55 K. Although extremely irradiated, WASP-14b does not show any distinct evidence of a thermal inversion. In addition, the present data nominally favor models with day-night energy redistribution less than ∼30%. The current data are generally consistent with oxygen-rich as well as carbon-rich compositions, although an oxygen-rich composition provides a marginally bettermore » fit. We confirm a significant eccentricity of e = 0.087 ± 0.002 and refine other orbital parameters.« less
Authors:
; ; ; ; ; ; ; ;  [1] ;  [2] ;  [3] ; ;  [4]
  1. 1Planetary Sciences Group, Department of Physics, University of Central Florida, Orlando, FL 32816-2385 (United States)
  2. Department of Physics and Department of Astronomy, Yale University, New Haven, CT 06511 (United States)
  3. Center for Radiophysics and Space Research, Space Sciences Building, Cornell University Ithaca, NY 14853-6801 (United States)
  4. Astrophysics Group, Keele University, Keele, Staffordshire ST5 5BG (United Kingdom)
Publication Date:
OSTI Identifier:
22348563
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 779; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ALBEDO; BRIGHTNESS; CARBON; DENSITY; ECLIPSE; EMISSION; EQUILIBRIUM; IRRADIATION; JUPITER PLANET; MASS; OXYGEN; SATELLITE ATMOSPHERES; SATELLITES; SPACE; TELESCOPES; TEMPERATURE INVERSIONS; VISIBLE RADIATION; WASPS