136 citations · 372 across the 13 of their papers we have counts for
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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…
Electrostatic activation of prebiotic chemistry in substellar atmospheres
Craig R. Stark, Christiane Helling, Declan A. Diver +1
Charged dust grains in the atmospheres of exoplanets may play a key role in the formation of prebiotic molecules, necessary to the origin of life. Dust grains submerged in an atmos…
Ionization in Atmospheres of Brown Dwarfs and Extrasolar Planets V: Alfvén Ionization
Craig R. Stark, Christiane Helling, Declan A. Diver +1
Observations of continuous radio and sporadic X-ray emission from low-mass objects suggest they harbour localized plasmas in their atmospheric environments. For low-mass objects, t…
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…