Speaker
Description
Ultra hot Jupiters around bright stars are the most favorable targets for high-resolution exoplanetary spectroscopy. We present our emission and transmission spectroscopy observations of the ultra hot Jupiter KELT-20 b/MASCARA-2 b from PEPSI on LBT, with R=130,000. With the LBT's large aperture we obtain some of the highest signal-to-noise ratio exoplanetary spectra to date (stellar spectra with total SNR~3400). We obtained a 16-sigma detection of Fe I emission from the planetary atmosphere via cross-correlation, and we consider the line profile and time variation of this signal in order to constrain the planetary atmospheric structure. We fail to detect any other species in emission despite the strong Fe I emission, including several species previously reported in the literature. We will discuss the implications of these non-detections, including placing limits on atmospheric inversion agents such as TiO and VO. These high signal-to-noise spectra give a preview of what we will be able to achieve for many more planets in the ELT era.
