136 citations · 325 across the 8 of their papers we have counts for
8 papers
The effect of lightning on the atmospheric chemistry of exoplanets and potential biosignatures
Patrick Barth, Eva E. Stüeken, Christiane Helling +2
Lightning has been suggested to play a role in triggering the occurrence of bio-ready chemical species. Future missions (PLATO, ARIEL, HWO, LIFE) and ground-based ELTs will investi…
Isotopic constraints on lightning as a source of fixed nitrogen in Earth's early biosphere
Patrick Barth, Eva E. Stüeken, Christiane Helling +4
Bioavailable nitrogen is thought to be a requirement for the origin and sustenance of life. Before the onset of biological nitrogen fixation, abiotic pathways to fix atmospheric N2…
Ground-Based Transmission Spectroscopy with VLT FORS2: Evidence for faculae and clouds in the optical spectrum of the warm Saturn WASP-110b
Nikolay Nikolov, Gracjan Maciejewski, Savvas Constantinou +12
We present a ground-based optical transmission spectrum for the warm Saturn-mass exoplanet WASP-110b from two transit observations made with the FOcal Reducer and Spectrograph (FOR…
MOVES IV. Modelling the influence of stellar XUV-flux, cosmic rays, and stellar energetic particles on the atmospheric composition of the hot Jupiter HD 189733b
Patrick Barth, Christiane Helling, Eva E. Stüeken +7
Hot Jupiters provide valuable natural laboratories for studying potential contributions of high-energy radiation to prebiotic synthesis in the atmospheres of exoplanets. In this fo…
Lightning and charge processes in brown dwarf and exoplanet atmospheres
Christiane Helling, Paul B Rimmer
The study of the composition of brown dwarf atmospheres helped to understand their formation and evolution. Similarly, the study of exoplanet atmospheres is expected to constrain t…
A Chemical Kinetics Network for Lightning and Life in Planetary Atmospheres
Paul B Rimmer, Christiane Helling
There are many open questions about prebiotic chemistry in both planetary and exoplanetary environments. The increasing number of known exoplanets and other ultra-cool, substellar…
The Influence of Galactic Cosmic Rays on Ion-Neutral Hydrocarbon Chemistry in the Upper Atmospheres of Free-Floating Exoplanets
P. B. Rimmer, Ch. Helling, C. Bilger
Cosmic rays may be linked to the formation of volatiles necessary for prebiotic chemistry. We explore the effect of cosmic rays in a hydrogen-dominated atmosphere, as a proof-of-co…
Ionization in atmospheres of Brown Dwarfs and extrasolar planets IV. The Effect of Cosmic Rays
Paul Rimmer, Christiane Helling
Cosmic rays provide an important source for free electrons in the Earth's atmosphere and also in dense interstellar regions where they produce a prevailing background ionization. W…