2014A&A...567A...8C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST21:07:33

2014A&A...567A...8C - Astronomy and Astrophysics, volume 567A, 8-8 (2014/7-1)

Observed spectral energy distribution of the thermal emission from the dayside of WASP-46b.

CHEN G., VAN BOEKEL R., WANG H., NIKOLOV N., SEEMANN U. and HENNING Th.

Abstract (from CDS):

We aim to construct a spectral energy distribution (SED) for the emission from the dayside atmosphere of the hot Jupiter WASP-46b and to investigate its energy budget. We observed a secondary eclipse of WASP-46b simultaneously in the g'r'i'z'JHK bands using the GROND instrument on the MPG/ESO 2.2m telescope. Eclipse depths of the acquired light curves were derived to infer the brightness temperatures at multibands that cover the SED peak. We report the first detection of the thermal emission from the dayside of WASP-46b in the K band at 4.2σ level and tentative detections in the H (2.5σ) and J (2.3σ) bands, with flux ratios of 0.253 +0.063–0.060%, 0.194±0.078%, and 0.129±0.055%, respectively. The derived brightness temperatures (2306+177–187K, 2462+245–302K, and 2453+198_-258K, respectively) are consistent with an isothermal temperature profile of 2386K, which is significantly higher than the dayside-averaged equilibrium temperature, indicative of very poor heat redistribution efficiency. We also investigate the tentative detections in the g'r'i' bands and the 3σ upper limit in the z' band, which might indicate the existence of reflective clouds if these tentative detections do not arise from systematics.

Abstract Copyright:

Journal keyword(s): stars: individual: WASP-46 - planets and satellites: individual: WASP-46b - planets and satellites: atmospheres - planetary systems - techniques: photometric

VizieR on-line data: <Available at CDS (J/A+A/567/A8): occ_g.dat occ_r.dat occ_i.dat occ_z.dat occ_j.dat occ_h.dat occ_k.dat>

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 WASP-43b Pl 10 19 38.0089444408 -09 48 22.603103969           ~ 193 1
2 WASP-46 * 21 14 56.8596386903 -55 52 18.460013390   13.0   13.06 12.29 G6 27 1
3 WASP-46b Pl 21 14 56.8596386903 -55 52 18.460013390           ~ 28 1
4 WASP-5b Pl 23 57 23.7565609528 -41 16 37.745589460           ~ 73 1

    Equat.    Gal    SGal    Ecl

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2020.07.03-21:07:33

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