Ks-band secondary eclipses of WASP-19b and WASP-43b with the Anglo-Australian Telescope

Date

2014-10-20

Authors

Zhou, G.
Bayliss, D. D. R.
Kedziora-Chudczer, L.
Salter, G.
Tinney, C. G.
Bailey, J.

Journal Title

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Volume Title

Publisher

Oxford University Press

Abstract

We report new Ks-band secondary eclipse observations for the hot-Jupiters WASP-19b and WASP-43b. Using the IRIS2 infrared camera on the Anglo-Australian Telescope (AAT), we measured significant secondary eclipses for both planets, with depths of 0.287-0.020 +0.020 per cent and 0.181-0.027 +0.027 per cent for WASP-19b and WASP-43b, respectively. We compare the observations to atmosphere models from the VSTAR line-by-line radiative transfer code, and examine the effect of C/O abundance, top layer haze, and metallicities on the observed spectra. We performed a series of signal injection and recovery exercises on the observed light curves to explore the detection thresholds of the AAT+IRIS2 facility. We find that the optimal photometric precision is achieved for targets brighter than Kmag = 9, for which eclipses as shallow as 0.05 per cent are detectable at >5σ significance.

Description

Keywords

planets and satellites: atmospheres, planets and satellites: individual: WASP-19b, planets and satellites: individual: WASP-43b

Citation

Source

Monthly Notices of the Royal Astronomical Society

Type

Journal article

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DOI

10.1093/mnras/stu1893

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