PEPSI Archives - Astrobiology

2D color map showing the transmission spectra - 1 divided by the out-of-transit column standard deviation at each pixel at different orbital phases for the Na d2 line (top) and Na d1 line (bottom) in the stellar restframe. Cyan dashed lines mark the 1st - 4th contact and the purple dashed lines mark the 2nd - 3rd contact. The black dashed lines illustrate the planetary absorption trajectory. Left: Transmission spectra before correcting with RM-CLV-model. Right: Transmission spectra corrected with the RM-CLV-model. -- astro-ph.EP

Astronomy & Telescopes, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Status Report

The PEPSI Exoplanet Transit Survey (PETS). V: New Na D Transmission Spectra Indicate A Quieter Atmosphere On HD 189733b

by Keith CowingApril 23, 2024April 23, 2024

Absorption lines from exoplanet atmospheres observed in transmission allow us to study atmospheric characteristics such as winds.