54 citations · 255 across the 15 of their papers we have counts for
15 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…
Exo-lightning radio emission: the case study of HAT-P-11b
Gabriella Hodosán, Christiane Helling, Paul B. Rimmer
Lightning induced radio emission has been observed on solar system planets. Lecavelier des Etangs et al. [2013] carried out radio transit observations of the exoplanet HAT-P-11b, a…
Insight into atmospheres of extrasolar planets through plasma processes
Ch. Helling, I. Vorgul
Extrasolar planets appear in a chemical diversity unseen in our own solar system. Despite their atmospheres being cold, continuous and transient plasma processes do affect these at…
Lightning Chemistry on Earth-like Exoplanets
Aleksandra Ardaseva, Paul B. Rimmer, Ingo Waldmann +4
We present a model for lightning shock induced chemistry that can be applied to atmospheres of arbitrary H/C/N/O chemistry, hence for extrasolar planets and brown dwarfs. The model…
Robust detection of quasi-periodic variability: A HAWKI mini survey of late T dwarfs
S. P. Littlefair, B. Burningham, Ch. Helling
We present HAWK-I J-band light curves of five late-type T dwarfs (T6.5-T7.5) with a typical duration of four hours, and investigate the evidence for quasi-periodic photometric vari…
Dust in brown dwarfs and extra-solar planets V. Cloud formation in carbon- and oxygen-rich environment
Ch. Helling, D. Tootill, P. Woitke +1
Recent observations indicate potentially carbon-rich exoplanet atmospheres. Spectral fitting methods for brown dwarfs and exoplanets have invoked the C/O ratio as additional parame…