267 citations · 766 across the 9 of their papers we have counts for
9 papers
FastChem 4: New chemical elements and improved convergence behaviour
Daniel Kitzmann, Joachim W. Stock, A. Beate C. Patzer
Chemical equilibrium calculations are a key ingredient for modelling and interpreting spectroscopic observations of (exo)planets, brown dwarfs, cool stars, and protoplanetary disks…
FastChem Cond: Equilibrium chemistry with condensation and rainout for cool planetary and stellar environments
Daniel Kitzmann, Joachim W. Stock, A. Beate C. Patzer
Cool astrophysical objects, such as (exo)planets, brown dwarfs, or asymptotic giant branch stars, can be strongly affected by condensation. Condensation does not only directly affe…
FastChem 2: An improved computer program to determine the gas-phase chemical equilibrium composition for arbitrary element distributions
Joachim W. Stock, Daniel Kitzmann, A. Beate C. Patzer
The computation of complex neutral/ionised chemical equilibrium compositions is invaluable to obtain scientific insights of, for example, the atmospheres of extrasolar planets and…
A spectral survey of an ultra-hot Jupiter: Detection of metals in the transmission spectrum of KELT-9 b
H. J. Hoeijmakers, D. Ehrenreich, D. Kitzmann +16
Context: KELT-9 b exemplifies a newly emerging class of short-period gaseous exoplanets that tend to orbit hot, early type stars - termed ultra-hot Jupiters. The severe stellar irr…
Evolution of Earth-like extrasolar planetary atmospheres: Assessing the atmospheres and biospheres of early Earth analog planets with a coupled atmosphere biogeochemical model
S. Gebauer, J. L. Grenfell, J. W. Stock +4
Understanding the evolution of Earth and potentially habitable Earth-like worlds is essential to fathom our origin in the Universe. The search for Earth-like planets in the habitab…
Equilibrium chemistry down to 100 K - Impact of silicates and phyllosilicates on carbon/oxygen ratio
P. Woitke, Ch. Helling, G. H. Hunter +5
We introduce a fast and versatile computer code, GGchem, to determine the chemical composition of gases in thermo-chemical equilibrium down to 100 K, with or without equilibrium co…
N2-associated surface warming on early Mars
P. von Paris, J. L. Grenfell, H. Rauer +1
Early Mars may have had a warmer and denser atmosphere allowing for the presence of liquid water on the surface. However, climate model studies have not been able to reproduce thes…
Potential Biosignatures in Super-Earth Atmospheres II. Photochemical Responses
J. L. Grenfell, S. Gebauer, M. Godolt +6
Spectral characterization of Super-Earth atmospheres for planets orbiting in the Habitable Zone of M-dwarf stars is a key focus in exoplanet science. A central challenge is to unde…
Oxidation of CO on surface hematite in high CO2 atmospheres
John Lee Grenfell, Joachim W. Stock, A. Beate C. Patzer +2
We propose a mechanism for the oxidation of gaseous CO into CO2 occurring on the surface mineral hematite (Fe2O3(s)) in hot, CO2-rich planetary atmospheres, such as Venus. This mec…