Exoplanets and Stellar Physics

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Astrophysically robust systematics removal using variational inference: application to the first month of Kepler data

(2013)

Authors:

S Roberts, A McQuillan, S Reece, S Aigrain
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Hubble Space Telescope hot Jupiter Transmission Spectral Survey: detection of water in HAT-P-1b from Wide Field Camera 3 near-infrared spatial scan observations

(2013)

Authors:

HR Wakeford, DK Sing, D Deming, NP Gibson, JJ Fortney, AS Burrows, G Ballester, N Nikolov, S Aigrain, G Henry, H Knutson, A Lecavelier des Etangs, F Pont, AP Showman, A Vidal-Madjar, K Zahnle
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Stellar Rotation Periods of the Kepler Objects of Interest: A Dearth of Close-in Planets around Fast Rotators

(2013)

Authors:

Amy McQuillan, Tsevi Mazeh, Suzanne Aigrain
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A sensitivity analysis of the WFCAM Transit Survey for short-period giant planets around M dwarfs

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 433:2 (2013) 889-906

Authors:

Gábor Kovács, Simon Hodgkin, Brigitta Sipőcz, David Pinfield, David Barrado, Jayne Birkby, Michele Cappetta, Patricia Cruz, Johannes Koppenhoefer, Eduardo L Martín, Felipe Murgas, Bas Nefs, Roberto Saglia, Jesus Zendejas
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The deep blue color of HD 189733b: Albedo measurements with Hubble Space Telescope/Space Telescope imaging spectrograph at visible wavelengths

Astrophysical Journal Letters 772:2 (2013)

Authors:

TM Evans, F Pont, DK Sing, S Aigrain, JK Barstow, JM Désert, N Gibson, K Heng, HA Knutson, A Lecavelier Des Etangs

Abstract:

We present a secondary eclipse observation for the hot Jupiter HD 189733b across the wavelength range 290-570 nm made using the Space Telescope Imaging Spectrograph on the Hubble Space Telescope. We measure geometric albedos of Ag = 0.40 ± 0.12 across 290-450 nm and Ag < 0.12 across 450-570 nm at 1σ confidence. The albedo decrease toward longer wavelengths is also apparent when using six wavelength bins over the same wavelength range. This can be interpreted as evidence for optically thick reflective clouds on the dayside hemisphere with sodium absorption suppressing the scattered light signal beyond 450 nm. Our best-fit albedo values imply that HD 189733b would appear a deep blue color at visible wavelengths. © 2013. The American Astronomical Society. All rights reserved..
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