46 citations · 124 across the 7 of their papers we have counts for
8 papers
Prediction of sulphate hazes in the lower Venus atmosphere
Peter Woitke, Manuel Scherf, Christiane Helling +8
We study the amount, size distribution and material composition of (sub-)mic aerosol particles in the lower Venus atmosphere < 50 km. Our GGchem phase-equilibrium model predicts me…
Eta-Earth Revisited I: A Formula for Estimating the Maximum Number of Earth-like Habitats
Helmut Lammer, Manuel Scherf, Laurenz Sproß
In this hypothesis article, we discuss the basic requirements of planetary environments where aerobe organisms can grow and survive, including atmospheric limitations of millimeter…
Eta-Earth Revisited II: Deriving a Maximum Number of Earth-like Habitats in the Galactic Disk
Manuel Scherf, Helmut Lammer, Laurenz Sproß
In Lammer et al. 2024, we defined Earth-like Habitats (EH) as rocky planets in the habitable zone of complex life (HZCL) on which Earth-like N-O-dominated atmospheres with…
The impact of intrinsic magnetic field on the absorption signatures of elements probing the upper atmosphere of HD209458b
M. L. Khodachenko, I. F. Shaikhislamov, H. Lammer +4
The signs of an expanding atmosphere of HD209458b have been observed with far-ultraviolet transmission spectroscopy and in the measurements of transit absorption by metastable HeI.…
Stellar Driven Evolution of Hydrogen-Dominated Atmospheres from Earth-Like to Super-Earth-Type Exoplanets
K. G. Kislyakova, M. Holmström, H. Lammer +1
In the present chapter we present the results of evolutionary studies of exoplanetary atmospheres. We mostly focus on the sub- to super-Earth domain, although these methods are app…
Effective induction heating around strongly magnetized stars
K. G. Kislyakova, L. Fossati, C. P. Johnstone +4
Planets that are embedded in the changing magnetic fields of their host stars can experience significant induction heating in their interiors caused by the planet's orbital motion.…
Astrophysical Conditions for Planetary Habitability
M. Guedel, R. Dvorak, N. Erkaev +7
With the discovery of hundreds of exoplanets and a potentially huge number of Earth-like planets waiting to be discovered, the conditions for their habitability have become a focal…
Stellar activity and magnetic shielding
J. -M. Grießmeier, M. Khodachenko, H. Lammer +3
Stellar activity has a particularly strong influence on planets at small orbital distances, such as close-in exoplanets. For such planets, we present two extreme cases of stellar v…