10:45 〜 11:00
[PCG19-07] High dispersion optical phase curves of ultra-hot Jupiters with SHINE ON.
★Invited Papers
キーワード：Exoplanet atmospheres, High dispersion spectroscopy, Ultra-hot Jupiters
Ultra-hot Jupiters (UHJs; Teq greater than 2500 K) are the hottest gaseous giant exoplanets known. They emerged as ideal laboratories to test (1) theories of atmospheric structure and climate under extreme irradiation, and (2) planet formation theories, due to the simultaneous presence of gaseous refractory (e.g. Fe) and volatile (e.g. C) elements in their atmospheres. In combination, these offer a crucial complement to traditional tracers of planet formation, like the carbon-to-oxygen ratio.
Theoretical predictions suggest that – unlike colder, “regular” hot Jupiters - UHJs should be close to chemical equilibrium and largely cloud-free, providing a more direct link between their thermal structure and their composition. Their climate should differ as well, due to the emergence of factors such as atmospheric drag, for example due to ionization of elements in their atmosphere. Yet, observational support is still sparse.
The SHINE ON program aims to fill this gap of knowledge through optical high dispersion (HDS) phase curves of about 15 UHJs obtained with some of the best instruments for this purpose (VLT ESPRESSO and Gemini-N MAROON-X). By resolving the planetary emission lines in time and wavelength SHINE ON will homogeneously provide - for the first time - longitudinally resolved information on the thermal structure, chemistry, wind speed and geometry of a statistically significant UHJ sample.
The talk will present the first results from the SHINE ON program. The talk will also discuss complementarities with near-infrared (e.g. Subaru IRD) and space-borne (e.g. JWST) observations, and discuss the potential of HDS phase curves in the era of the Extremely Large Telescopes.
Theoretical predictions suggest that – unlike colder, “regular” hot Jupiters - UHJs should be close to chemical equilibrium and largely cloud-free, providing a more direct link between their thermal structure and their composition. Their climate should differ as well, due to the emergence of factors such as atmospheric drag, for example due to ionization of elements in their atmosphere. Yet, observational support is still sparse.
The SHINE ON program aims to fill this gap of knowledge through optical high dispersion (HDS) phase curves of about 15 UHJs obtained with some of the best instruments for this purpose (VLT ESPRESSO and Gemini-N MAROON-X). By resolving the planetary emission lines in time and wavelength SHINE ON will homogeneously provide - for the first time - longitudinally resolved information on the thermal structure, chemistry, wind speed and geometry of a statistically significant UHJ sample.
The talk will present the first results from the SHINE ON program. The talk will also discuss complementarities with near-infrared (e.g. Subaru IRD) and space-borne (e.g. JWST) observations, and discuss the potential of HDS phase curves in the era of the Extremely Large Telescopes.