Observations of Optical Secondary Eclipses of Transiting Hot Jupiters with the GTC

Details Observations of Optical Secondary Eclipses of Transiting Hot Jupiters with the GTC Observations of Optical Secondary Eclipses of Transiting Hot Jupiters with the GTC

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ess.....2.1203b&link_type=abstract

American Astronomical Society, ESS meeting #2, #12.03

Astronomy and Astrophysics

Astronomy

Scientific paper

We present observations of optical secondary eclipses of several hot Jupiters using the OSIRIS imager on the 10.4m Gran Telescopio Canarias (GTC) at the Observatorio del Roque de los Muchachos, La Palma. Detections of optical thermal emission and possible reflective flux from hot Jupiters provide a unique insight into the chemical and physical processes in planetary atmospheres. We have initiated a large ESO program (90 hours) on the GTC to perform photometric monitoring of secondary eclipses, taking advantage of the CCD windowing capabilities of the OSIRIS instrument and defocussing the telescope to achieve a rapid cadence of 5-14 seconds with a precision of approximately 5x10-4 per 5 minutes for our faintest target, CoRoT-1b (V=13.6). By measuring the secondary eclipse depth ratios between several optical and near-infrared pass-bands (u, r, i and z) we can constrain planetary models that predict global heat circulation by zonal winds, as well as studying the effects of stellar irradiation on the planetary atmospheric structure. We present here the detection of optical thermal emission from CoRoT-1b, and we will also show our latest results from further GTC observations of TrES-3b, WASP-3b and HATP-7b scheduled for the summer of 2011, adding valuable new insight into this thrilling field of exoplanet characterization.

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