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Detection of day-side emission in the exoplanet KELT-9b

Presentation #237.01 in the session “Extrasolar Planets: Atmospheres 1”.

Published onJan 11, 2021
Detection of day-side emission in the exoplanet KELT-9b

Observational characterization of exoplanets yields important insights into their composition and atmospheric chemistry. In particular, high-resolution spectroscopy, when combined with the cross-correlation technique, is a powerful and robust probe of planetary atmospheres. The hot Jupiter KELT-9b is of unusual interest because it is the hottest known exoplanet, with a dayside temperature of about 4600K. Therefore, KELT-9b provides an opportunity to probe the interesting atmospheric chemistry that occurs at ultra-high temperatures and provides a valuable constraint on atmospheric chemistry models at their extreme limit. We will present the results of our CARMENES observations of its day-side, in agreement with the previous day-side detection at visible wavelengths. In addition, we will report limits on the presence of molecules in the near-infrared day-side spectrum, and constraints on the atmospheric chemistry.

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