122 citations · 589 across the 18 of their papers we have counts for
13 papers · 1 filter
Assessment of a Physics-based Retrieval of Exoplanet Atmospheric Temperatures from Infrared Emission Spectra
Franz Schreier, J. Lee Grenfell, Fabian Wunderlich +1
Atmospheric temperatures are to be estimated from thermal emission spectra of Earth-like exoplanets orbiting M-stars as observed by current and future planned missions. To this end…
Influence of Biomass Emissions upon Habitability, Biosignatures and Detectability in Earth-like Atmospheres
Stefanie Gebauer, Iva Vilović, John Lee Grenfell +3
We investigate atmospheric responses of modeled hypothetical Earth-like planets in the habitable zone of the M-dwarf AD Leonis to reduced oxygen (O2), removed biomass (dead Earth),…
Detectability of biosignatures on LHS 1140 b
Fabian Wunderlich, Markus Scheucher, John Lee Grenfell +4
Terrestrial extrasolar planets around low-mass stars are prime targets when searching for atmospheric biosignatures with current and near-future telescopes. The habitable-zone Supe…
Effect of mantle oxidation state and escape upon the evolution of Earth's magma ocean atmosphere
Nisha Katyal, Gianluigi Ortenzi, John Lee Grenfell +7
The magma ocean period was a critical phase determining how Earth atmosphere developed into habitability. However there are major uncertainties in the role of key processes such as…
Proxima Centauri b: A Strong Case for including Cosmic-Ray-induced Chemistry in Atmospheric Biosignature Studies
M. Scheucher, K. Herbst, V. Schmidt +6
Due to its Earth-like minimum mass of 1.27 M and its close proximity to our Solar system, Proxima Centauri b is one of the most interesting exoplanets for habitability…
A New Model Suite to Determine the Influence of Cosmic Rays on (Exo)planetary Atmospheric Biosignatures -- Validation based on Modern Earth
Konstantin Herbst, John Lee Grenfell, Miriam Sinnhuber +8
The first opportunity to detect indications for life outside the Solar System may be provided already within the next decade with upcoming missions such as the James Webb Space Tel…
Detectability of atmospheric features of Earth-like planets in the habitable zone around M dwarfs
F. Wunderlich, M. Godolt, J. L. Grenfell +6
We investigate the detectability of atmospheric spectral features of Earth-like planets in the habitable zone (HZ) around M dwarfs with the future James Webb Space Telescope (JWST)…
Transmission Spectroscopy with the ACE-FTS Infrared Spectral Atlas of Earth: A Model Validation and Feasibility Study
Franz Schreier, Steffen Städt, Pascal Hedelt +1
Infrared solar occultation measurements are well established for remote sensing of Earth's atmosphere, and the corresponding primary transit spectroscopy has turned out to be valua…
Response of Atmospheric Biomarkers to NOx-induced Photochemistry Generated by Stellar Cosmic Rays for Earth-like Planets in the Habitable Zone of M-Dwarf Stars
John Lee Grenfell, Jean-Mathias Grriessmeier, Philip von Paris +6
Understanding whether M-dwarf stars may host habitable planets with Earth-like atmospheres and biospheres is a major goal in exoplanet research. If such planets exist, the question…
Spectral features of Earth-like planets and their detectability at different orbital distances around F, G, and K-type stars
Pascal Hedelt, Philip von Paris, Mareike Godolt +6
We investigate the spectral appearance of Earth-like exoplanets in the HZ of different main sequence stars at different orbital distances. We furthermore discuss for which of these…
Spectroscopic characterization of the atmospheres of potentially habitable planets: GL 581 d as a model case study
Philip von Paris, Juan Cabrera, Mareike Godolt +5
(abridged) The Super-Earth candidate GL 581 d is the first potentially habitable extrasolar planet. Therefore, GL 581 d is used to illustrate a hypothetical detailed spectroscopic…
Venus transit 2004: Illustrating the capability of exoplanet transmission spectroscopy
P. Hedelt, R. Alonso, T. Brown +6
The transit of Venus in 2004 offered the rare possibility to remotely sense a well-known planetary atmosphere using ground-based observations for absorption spectroscopy. Transmiss…
Potential Biosignatures in Super-Earth Atmospheres
H. Rauer, S. Gebauer, P. v. Paris +7
Atmospheric temperature and mixing ratio profiles of terrestrial planets vary with the spectral energy flux distribution for different types of M-dwarf stars and the planetary grav…