Results 71 to 80 of about 114 (96)

Observing spatial and temporal variations in the atmospheric chemistry of rocky exoplanets: Prospects for mid-infrared spectroscopy

Astronomy & Astrophysics
Context. Future telescopes such as the Large Interferometer For Exoplanets (LIFE) will enable the unprecedented characterisation of the atmospheres of nearby rocky exoplanets, probing mid-infrared signatures of key molecules (e.g. CO2, H2O, O3, and CH4).
Braam M., Angerhausen D.
doaj   +1 more source

Atmospheric Waves Driving Variability and Cloud Modulation on a Planetary-mass Object

The Astrophysical Journal
Planetary-mass objects and brown dwarfs at the transition ( T _eff ∼ 1300 K) from relatively red L dwarfs to bluer mid-T dwarfs show enhanced spectrophotometric variability.
Michael K. Plummer, Ji Wang, Étienne Artigau, René Doyon, Genaro Suárez   +4 more
doaj   +1 more source

The Polar Vortex Hypothesis: Evolving, Spectrally Distinct Polar Regions Explain Short- and Long-term Light-curve Evolution and Color–Inclination Trends in Brown Dwarfs and Giant Exoplanets

The Astrophysical Journal Letters
Recent studies revealed viewing-angle-dependent color and spectral trends in brown dwarfs, as well as long-term photometric variability (∼100 hr). The origins of these trends are yet unexplained.
Nguyen Fuda, Dániel Apai
doaj   +1 more source

Planetary Habitability Under the Light of a Rapidly Changing Star

The Astronomical Journal
Planetary atmospheric energy budgets primarily depend on stellar incident flux. However, stellar variability can have major consequences for the evolution of planetary climates. In this work, we evaluate how stellar variability influences the equilibrium
Tara Fetherolf, Sadie G. Welter, Colby M. Ostberg, Stephen R. Kane, Rory Barnes, Emilie R. Simpson   +5 more
doaj   +1 more source

Pursuing Truth: Improving Retrievals on Mid-infrared Exo-Earth Spectra with Physically Motivated Water Abundance Profiles and Cloud Models

The Astrophysical Journal
Atmospheric retrievals are widely used to constrain exoplanet properties from observed spectra. We investigate how the common nonphysical retrieval assumptions of vertically constant molecule abundances and cloud-free atmospheres affect our ...
Björn S. Konrad, Sascha P. Quanz, Eleonora Alei, Robin Wordsworth   +3 more
doaj   +1 more source

Earth-like Exoplanets in Spin–Orbit Resonances: Climate Dynamics, 3D Atmospheric Chemistry, and Observational Signatures

The Planetary Science Journal
Terrestrial exoplanets around M- and K-type stars are important targets for atmospheric characterization. Such planets are likely tidally locked with the order of spin–orbit resonances (SORs) depending on eccentricity. We explore the impact of SORs on 3D
Marrick Braam, Paul I. Palmer, Leen Decin, Nathan J. Mayne, James Manners, Sarah Rugheimer   +5 more
doaj   +1 more source

Hot Rocks Survey. V. Secondary Eclipse Photometry of GJ 3473 b with JWST/MIRI

The Astronomical Journal
JWST is transforming our ability to characterize small exoplanets, from sub-Neptunes to rocky worlds. A key open question is whether highly irradiated rocky planets can retain atmospheres or are stripped bare by stellar irradiation—a boundary that ...
Måns Holmberg, Hannah Diamond-Lowe, João M. Mendonça, Daniel Kitzmann, Néstor Espinoza, Natalie H. Allen, Prune C. August, Mark Fortune, Amélie Gressier, Jegug Ih, Erik Meier Valdés, Merlin Zgraggen, Lars A. Buchhave, Brice-Olivier Demory, Chloe Fisher, Neale P. Gibson, Kevin Heng, Bibiana Prinoth, Adam J. Burgasser   +18 more
doaj   +1 more source

Temporal variability in transmission spectra of H2-dominated exoplanets: The influence of thermal evolution and stellar irradiation on atmospheric composition

New Astronomy
Viktória Kecskeméthy, Amy Louca, Yamila Miguel   +2 more
openaire   +2 more sources

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Early Release Science of the exoplanet WASP-39b with JWST NIRSpec PRISM

Nature, 2023
Zafar Rustamkulov, David K Sing, Michael R Line   +2 more
exaly  

POSEIDON: A Multidimensional Atmospheric Retrieval Code for Exoplanet Spectra

Journal of Open Source Software, 2023
Ryan J Macdonald
exaly