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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 693407.0, MPI für Astronomie / Publikationen_mpia
Ground-based Detections of Thermal Emission from the Dense Hot Jupiter WASP-43b in the H and K s Bands
Authors:Wang, W.; van Boekel, R.; Madhusudhan, N.; Chen, G.; Zhao, G.; Henning, T.
Date of Publication (YYYY-MM-DD):2013
Title of Journal:The Astrophysical Journal
Start Page:id. 70 (8 pp)
Audience:Not Specified
Abstract / Description:We report new detections of thermal emission from the transiting hot Jupiter WASP-43b in the H and K s bands as observed at secondary eclipses. The observations were made with the WIRCam instrument on the Canada-France-Hawaii Telescope. We obtained a secondary eclipse depth of 0.103_{-0.017}^{+0.017}% and 0.194_{-0.029}^{+0.029}% in the H and K s bands, respectively. The K s-band depth is consistent with the previous measurement in the narrow band centered at 2.09 μm by Gillon et al. Our eclipse depths in both bands are consistent with a blackbody spectrum with a temperature of ~1850 K, slightly higher than the dayside equilibrium temperature without day-night energy redistribution. Based on theoretical models of the dayside atmosphere of WASP-43b, our data constrain the day-night energy redistribution in the planet to be <~ 15%-25%, depending on the metal content in the atmosphere. Combined with energy balance arguments, our data suggest that a strong temperature inversion is unlikely in the dayside atmosphere of WASP-43b. However, a weak inversion cannot be strictly ruled out at the current time. Future observations are required to place detailed constraints on the chemical composition of the atmosphere.
Free Keywords:planetary systems; stars: individual: WASP-43; techniques: photometric
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
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