Exoclimes_Conference_booklet1

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abundances of molecules in the atmosphere has not yet been possible using only highresolution observation due to degeneracies. We will discuss what other high-resolution measurements can be performed with current instruments to obtain a better understanding of the chemistry and dynamics of hot-Jupiter atmospheres. We will present results from our sensitivity analysis of simulated CRIRES observations, showing at what wavelengths particular molecules are best detected. We will also discuss whether molecules can be detected from high-resolution thermal radiation from the night-side. We find that for some planets the night-side might even yield a larger signal than the day-side. 2D mapping of the eccentric exoplanet HAT-P-2b! Julien!de Wit — Massachusetts Institute of Technology The class of close-in gas giant planets known as hot Jupiters provides an exceptional insight into atmospheric circulation, as these planets are expected to be both highly irradiated and in either synchronous or pseudo-synchronous orbits depending on their orbital eccentricity. We can probe atmospheric circulation through phase curve measurements, which tell us about their brightness as a function of longitude. Recently, a new observational tool, “eclipse mapping”, has been developed enabling the creation of maps that are resolved in both longitude and latitude, unlike phase curves. To date, only one planet (HD 189733b) has been successfully mapped using this technique. Here, we present the first two-dimensional maps of the eccentric exoplanet HAT-P-2b in the Spitzer 4.5 micron bandpass. This map is derived from fourteen new secondary eclipses observed in the 4.5 micron band. The high eccentricity of HAT-P-2b leads to fundamental differences between its atmospheric circulation and that of HD189733b. A high eccentricity prevents tidal locking and implies time-variable stellar heating, hence time-variable forcing. HAT-P-2b is eclipsed post-periastron, hence we use eclipse mapping to gain insights into how its atmosphere responds to transient heating. In particular, HAT-P- 2b’s map will yield constraints on its radiative and advective time-scales and probe the spatial extent of its dayside thermal inversion. We will discuss the implication of our findings in the context of atmospheric circulation models that can be applied to a wide range of planets. Mapping Clouds in Exoplanet Atmospheres Brice-Olivier Demory — Massachusetts Institute of Technology Clouds and hazes are ubiquitous in the solar system's giant planet and brown-dwarf atmospheres. It has been long suggested that clouds would also play a strong role in shaping the spectra of exoplanets in general and hot Jupiters in particular. Recently, clouds have been reported in the atmosphere of HD189733b. We will present the first results of a program aiming at detecting and characterizing clouds in hot-Jupiter atmospheres. We use joint space-based visible+IR occultation and phase-curve photometry to reconstruct low-resolution maps of thick clouds. We will discuss the possible formation scenarios for these clouds and explore the degeneracies involved in the retrieval of the particles properties (coverage, size distribution, vertical extent, composition, shape, etc.). We will finally discuss how near-to-come space- and ground-based facilities will contribute to the detailed characterization of these clouds. 42
Characterising Exoplanets Using Kepler Phase-Curves! Lisa Esteves — University of Toronto! Although the Kepler mission is mainly aimed at searching for exoplanet transits, its highprecision photometry and long-term monitoring of the same field, makes it ideal to use for phase-curve measurements. Recently, using almost four years of Kepler data, we have been able to measure the phase-curve of eight Kepler objects. For five of these we present the very first phase-curve measurements, while for the other three objects we present greatly refined parameters. In addition we demonstrate how phase-curves measurements can be used as a very powerful tool for ruling out false positives within the Kepler planet candidate population. Measuring the reflection signal of HD189733b! Tom Evans — Oxford University! The multi-wavelength reflection signal of an exoplanet provides a valuable insight into the composition and structure of its atmosphere. In this talk, I will describe our measurement of a secondary eclipse of HD189733b across the 290-570nm wavelength range, made using HST/STIS. We found that the albedo of the planet decreases towards longer wavelengths in this range from approximately Ag=0.4 to Ag
Page 1: PROGRAMME & ABSTRACTS 1
Page 4 and 5: Presentation Venue Davos is a winte
Page 6 and 7: Programme Tuesday 11th Session: Exo
Page 8 and 9: Programme Thursday 13th Session: Br
Page 10 and 11: Participants PARTICIPANTS Dorian! A
Page 12 and 13: Participants Sara! Khalafinejad! Ha
Page 14 and 15: TALKS/POSTERS ABSTRACTS * INSIGHTS
Page 16 and 17: Finally, we will show GCM simulatio
Page 18 and 19: Our results show that whatever the
Page 20 and 21: planets are now available, constrai
Page 22 and 23: sophisticated atmosphere and surfac
Page 24 and 25: Exoplanetary Extreme Space Weather
Page 26 and 27: consistently calculates the ground
Page 28 and 29: pressure.The Bcool project is an in
Page 30 and 31: the climate on exoplanets by provid
Page 32 and 33: new inversion framework for the int
Page 34 and 35: combined observations provide const
Page 36 and 37: Constraining the degeneracy of Supe
Page 38 and 39: structure by integrating the couple
Page 40 and 41: carbon- and oxygen-bearing species.
Page 44 and 45: data reduction stage crucial to our
Page 46 and 47: us to reproduce this transit asymme
Page 48 and 49: atios, and temperature profiles, th
Page 50 and 51: triple stellar system, and a revise
Page 52 and 53: OH, H2, CO, CO2, CH4, NH3, MgO, MgS
Page 54 and 55: non hydrostatic Euler equations on
Page 56 and 57: ongoing. This will help us understa
Page 58 and 59: measurements of Planet Beta Pictori
Page 60 and 61: models can still be applied in this
Page 62 and 63: Comprehensive Results from the Weat
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