58 citations · 126 across the 6 of their papers we have counts for
6 papers
The high-energy environment of the heavy sub-Earth GJ 367 b indicates likely complete evaporation of its atmosphere
K. Poppenhaeger, L. Ketzer, N. Ilic +5
The planet GJ 367 b is a recently discovered high-density sub-Earth orbiting an M dwarf star. Its composition was modelled to be predominantly iron with a potential remainder of a…
Three young planets around the K-dwarf K2-198: High-energy environment, evaporation history and expected future
Laura Ketzer, Katja Poppenhaeger, Martina Baratella +1
Planets orbiting young stars are thought to experience atmospheric evaporation as a result of the host stars' high magnetic activity. We study the evaporation history and expected…
The influence of host star activity evolution on the population of super-Earths and mini-Neptunes
Laura Ketzer, Katja Poppenhaeger
The detected exoplanet population displays a dearth of planets with sizes of about two Earth radii, the so-called radius gap. This is interpreted as an evolutionary effect driven b…
The PEPSI Exoplanet Transit Survey (PETS) I: Investigating the presence of a silicate atmosphere on the super-Earth 55 Cnc e
Engin Keles, Matthias Mallonn, Daniel Kitzmann +26
The study of exoplanets and especially their atmospheres can reveal key insights on their evolution by identifying specific atmospheric species. For such atmospheric investigations…
Estimating photoevaporative mass loss of exoplanets with PLATYPOS
Laura Ketzer, Katja Poppenhaeger
We develop PLATYPOS (PLAneTarY PhOtoevaporation Simulator), a python code to perform planetary photoevaporative mass-loss calculations for close-in planets with hydrogen-helium env…
X-ray irradiation and evaporation of the four young planets around V1298 Tau
K. Poppenhaeger, L. Ketzer, M. Mallonn
Planets around young stars are thought to undergo atmospheric evaporation due to the high magnetic activity of the host stars. Here we report on X-ray observations of V1298 Tau, a…