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

Martioli, Eder and Colon, Knicole D. and Angerhausen, Daniel and Stassun, Keivan G. and Rodriguez, Joseph E. and Zhou, George ORCID: https://orcid.org/0000-0002-4891-3517 and Gaudi, B. Scott and Pepper, Joshua and Beatty, Thomas G. and Tata, Ramarao and James, David J. and Eastman, Jason D. and Wilson, Paul Anthony and Bayliss, Daniel and Stevens, Daniel J. (2017) 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. ISSN 0035-8711

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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.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 07 Feb 2022 02:49
Last Modified: 14 Feb 2022 00:19
Uncontrolled Keywords: stars: planetary systems; instrumentation: photometers; infrared:; planetary systems; facility: CFHT; instrument: WIRCam; Astrophysics -; Earth and Planetary Astrophysics; Astrophysics - Instrumentation; Methods for Astrophysics; Astrophysics - Solar and Stellar Astrophysics
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences
Identification Number or DOI: https://doi.org/10.1093/mnras/stx3009
URI: http://eprints.usq.edu.au/id/eprint/45009

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