Small but mighty : High-resolution spectroscopy of ultra-hot Jupiter atmospheres with compact telescopes Transmission spectrum of KELT-9 b with Wendelstein’s FOCES spectrograph
When observing transmission spectra produced by the atmospheres of ultra-hot Jupiters (UHJs), large telescopes are typically the instrument of choice given the very weak signal of the planet’s atmopshere. The aim of the present study is to demonstrate that, for favourable targets, smaller telescopes are fully capable of conducting high-resolution cross-correlation spectroscopy. We apply the cross-