598 citations · 6.2k across the 94 of their papers we have counts for
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The Evolution of Stellar Rotation and the hydrogen atmospheres of habitable-zone Terrestrial Planets
C. P. Johnstone, M. Güdel, A. Stökl +7
Terrestrial planets formed within gaseous protoplanetary disks can accumulate significant hydrogen envelopes. The evolution of such an atmosphere due to XUV driven evaporation depe…
Outgassing History and Escape of the Martian Atmosphere and Water Inventory
H. Lammer, E. Chassefière, Ö. Karatekin +11
The evolution and escape of the martian atmosphere and the planet's water inventory can be separated into an early and late evolutionary epoch. The first epoch started from the pla…
Origin and Stability of Exomoon Atmospheres - Implications for Habitability
H. Lammer, S. -C. Schiefer, I. Juvan +7
We study the origin and escape of catastrophically outgassed volatiles (HO, CO) from exomoons with Earth-like densities and masses of , and $…
Response of Atmospheric Biomarkers to NOx-induced Photochemistry Generated by Stellar Cosmic Rays for Earth-like Planets in the Habitable Zone of M-Dwarf Stars
John Lee Grenfell, Jean-Mathias Grriessmeier, Philip von Paris +6
Understanding whether M-dwarf stars may host habitable planets with Earth-like atmospheres and biospheres is a major goal in exoplanet research. If such planets exist, the question…
Short-period stellar activity cycles with Kepler photometry
Oleksiy V. Arkhypov, Maxim L. Khodachenko, Helmut Lammer +3
We study the short-periodic component of stellar activity with a cycle periods Pcyc up to 1000 days using the Kepler mission photometry of fast-rotating (rotational periods from 1…
Atmosphere expansion and mass loss of close-orbit giant exoplanets heated by stellar XUV: I. Modeling of hydrodynamic escape of upper atmospheric material
I. F. Shaikhislamov, M. L. Khodachenko, Yu. L. Sasunov +3
In the present series of papers we propose a consistent description of the mass loss process. To study the effects of intrinsic magnetic field of a close-orbit giant exoplanet (so-…