A survey of eight hot Jupiters in secondary eclipse using WIRCam at CFHT

Martioli, Eder; Colón, Knicole D; Angerhausen, Daniel; Stassun, Keivan G; Rodriguez, Joseph E; Zhou, George; Gaudi, B Scott; Pepper, Joshua; Beatty, Thomas G; Tata, Ramarao; James, David J; Eastman, Jason D; Wilson, Paul Anthony; Bayliss, Daniel; Stevens, Daniel J (2018). A survey of eight hot Jupiters in secondary eclipse using WIRCam at CFHT. Monthly notices of the Royal Astronomical Society, 474(3), pp. 4264-4277. Oxford University Press 10.1093/mnras/stx3009

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We present near-infrared high-precision photometry for eight transiting hot Jupiters observed during their predicted secondary eclipses. Our observations were carried out using the staring mode of the WIRCam instrument on the Canada-France-Hawaii Telescope (CFHT). We present the observing strategies and data reduction methods which delivered time series photometry with statistical photometric precision as low as 0.11 per cent. We performed a Bayesian analysis to model the eclipse parameters and systematics simultaneously. The measured planet-to-star flux ratios allowed us to constrain the thermal emission from the day side of these hot Jupiters, as we derived the planet brightness temperatures. Our results combined with previously observed eclipses reveal an excess in the brightness temperatures relative to the blackbody prediction for the equilibrium temperatures of the planets for a wide range of heat redistribution factors. We find a trend that this excess appears to be larger for planets with lower equilibrium temperatures. This may imply some additional sources of radiation, such as reflected light from the host star and/or thermal emission from residual internal heat from the formation of the planet.

Item Type:

Journal Article (Original Article)


10 Strategic Research Centers > Center for Space and Habitability (CSH)
08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences
08 Faculty of Science > Physics Institute
08 Faculty of Science > Physics Institute > NCCR PlanetS

UniBE Contributor:

Angerhausen, Daniel


500 Science > 520 Astronomy
500 Science > 530 Physics




Oxford University Press




Danielle Zemp

Date Deposited:

03 Jun 2019 16:47

Last Modified:

05 Dec 2022 15:26

Publisher DOI:






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