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

Journal Article · Tue Dec 10 00:00:00 EST 2013 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/779/1/5· OSTI ID:22348563

Blecic, Jasmina; Harrington, Joseph; Stevenson, Kevin B.; Hardy, Ryan A.; Cubillos, Patricio E.; Hardin, Matthew; Campo, Christopher J.; Bowman, William C.; Nymeyer, Sarah ^[1]; Madhusudhan, Nikku ^[2]; Loredo, Thomas J. ^[3]; Anderson, David R.; Maxted, Pierre F. L., ^[4]

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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)

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 better fit. We confirm a significant eccentricity of e = 0.087 ± 0.002 and refine other orbital parameters.

• OSTI ID: 22348563
• Journal Information: Astrophysical Journal, Vol. 779, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

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