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Hint of a transiting extended atmosphere on 55 Cancri b
David Ehrenreich, Vincent Bourrier, Xavier Bonfils +9
The naked-eye star 55 Cancri hosts a planetary system with five known planets, including a hot super-Earth (55 Cnc e) extremely close to its star and a farther out giant planet (55…
GTC OSIRIS transiting exoplanet atmospheric survey: detection of sodium in XO-2b from differential long-slit spectroscopy
D. K. Sing, C. M. Huitson, M. Lopez-Morales +8
We present two transits of the hot-Jupiter exoplanet XO-2b using the Gran Telescopio Canarias (GTC). The time series observations were performed using long-slit spectroscopy of XO-…
Temporal variations in the evaporating atmosphere of the exoplanet HD 189733b
A. Lecavelier des Etangs, V. Bourrier, P. J. Wheatley +8
Atmospheric escape has been detected from the exoplanet HD 209458b through transit observations of the hydrogen Lyman-alpha line. Here we present spectrally resolved Lyman-alpha tr…
Temperature-Pressure Profile of the hot Jupiter HD 189733b from HST Sodium Observations: Detection of Upper Atmospheric Heating
Catherine M. Huitson, David K. Sing, Alfred Vidal-Madjar +4
We present transmission spectra of the hot Jupiter HD 189733b taken with the Space Telescope Imaging Spectrograph aboard HST. The spectra cover the wavelength range 5808-6380 Ang w…