Results 181 to 190 of about 3,181,123 (208)

Chance and purpose in the evolution of biospheres. [PDF]

Philos Trans R Soc Lond B Biol Sci
Donoghue PCJ, Lenton TM, Okasha S, Shields GA, Spang A.   +4 more
europepmc   +1 more source

Atmospheric Escape and the Evolution of Close-In Exoplanets [PDF]

Annual Review of Earth and Planetary Sciences, 2019
Exoplanets with substantial hydrogen/helium atmospheres have been discovered in abundance, many residing extremely close to their parent stars. The extreme irradiation levels that these atmospheres experience cause them to undergo hydrodynamic atmospheric escape.
James E Owen
exaly   +6 more sources

Haze evolution in temperate exoplanet atmospheres through surface energy measurements [PDF]

Nature Astronomy, 2021
6 figures, 2 tables, 23 ...
Véronique Vuitton, Eliza Kempton, Diana Powell   +2 more
exaly   +7 more sources

Modelling the effect of stellar metallicity on the XUV evolution of low-mass stars and its impact on exoplanet atmospheres/habitability [PDF]

Monthly Notices of the Royal Astronomical Society
ABSTRACT Understanding how exoplanet atmospheres evolve is a key question in the context of habitability. One key process governing this evolution is atmospheric evaporation by stellar X-ray and EUV (extreme ultraviolet) emission (collectively, XUV).
Víctor See, O J Hall, Louis Amard
exaly   +4 more sources

POSEIDON: A Multidimensional Atmospheric Retrieval Code for Exoplanet Spectra [PDF]

Journal of Open Source Software, 2023
Exoplanet atmospheres are a dynamic and fast-changing field at the frontier of modern astronomy. Telescope observations can reveal the chemical composition, temperature, cloud properties, and (potentially) the habitability of these remote worlds ...
Ryan J Macdonald
exaly   +4 more sources

Atmospheric Seasonality as an Exoplanet Biosignature [PDF]

Astrophysical Journal Letters, 2018
Current investigations of exoplanet biosignatures have focused on static evidence of life, such as the presence of biogenic gases like O2 or CH4.
Timothy Lyons, Victoria Meadows, Christopher Reinhard   +2 more
exaly   +2 more sources

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Interpreting exoplanet biosignatures with a coupled atmosphere-interior-geochemical evolution model

2021
<p>The atmospheric evolution of rocky planets is shaped by a range of astrophysical, geophysical, and geochemical processes. Interpreting observations of potentially habitable exoplanets will require an improved understanding of how these competing influences interact on long timescales.
Joshua Krissansen-Totton, Jonathan Fortney, Francis Nimmo, Nicholas Wogan   +3 more
openaire   +1 more source

Coupling the Atmospheric and Dynamical Evolution of Close-in Exoplanets

The vast majority of the detected exoplanets orbit in less than a month around their star, in extreme conditions unmet in the Solar System. The demographics of these close-in planets exhibit a striking feature: the lack of Neptune-size worlds on very short orbits, also dubbed the "Neptunian desert", which challenges our understanding of planetary ...
Omar Attia, Vincent Bourrier
openaire   +1 more source

Interior structure, mantle-atmosphere co-evolution, and habitability of low-mass exoplanets

2023
Um grundlegende Fragen der Planetenforschung zu beantworten, ist ein fundiertes Verständnis der Zusammensetzung und der Prozesse im Inneren von Exoplaneten eine essenzielle Voraussetzung. Solche Fragen beinhalten beispielsweise, welche Arten von Planeten es geben könnte, welche Mechanismen die Planetenentstehung und -entwicklung steuern, wie ...
openaire   +3 more sources

Coupling Surface-Atmosphere Feedbacks: A Scheme for Modelling Atmosphere Evolution of Rocky Exoplanets

Atmospheric escape is a fundamental process that shapes the evolution of exoplanets. Given that the majority of known exoplanets reside on short orbital periods (i.e., less than 100 days), they are subjected to prolonged and intense irradiation from their host stars.
Jim Shih, Kevin Heng, James E. Owen
openaire   +1 more source