Results 141 to 150 of about 700,042 (263)

MESSENGER Observations of a Possible Alfvén Wing at Mercury Driven by a Low Alfvénic Mach Number Interplanetary Coronal Mass Ejection

Journal of Geophysical Research: Space Physics, Volume 130, Issue 3, March 2025.
Abstract We investigate Mercury's response to rare, low Alfvénic Mach number MA $\left({M}_{A}\right)$ solar wind conditions using observations from the Mercury Surface, Space Environment, Geochemistry, and Ranging (MESSENGER) mission. This study provides compelling evidence of Mercury's altered magnetospheric state under these extreme conditions ...
Charles F. Bowers, Caitríona M. Jackman, Xianzhe Jia, James A. Slavin, Joachim Saur, Mika K. G. Holmberg, Ryan M. Dewey, Daniel Heyner, Filip Elekes, Lina Z. Hadid, Benoit Lavraud, Yang Wang, Hans L. F. Huybrighs, Matthew J. Rutala, Alexandra R. Fogg, Stephenie Brophy Lee, Daragh M. Hollman   +16 more
wiley   +1 more source

Exoplanet Atmospheres with JWST

, 2022
Planetary atmospheres are diverse. They hold key insights into the complex physics and chemistry that has shaped them through formation. In this talk I focus on the understanding we have gained on exoplanet atmospheres from transiting studies, including the importance of wide wavelength coverage.
openaire   +1 more source

Is OSSO a Significant Contributor to the Unknown UV Absorber in Venus' Atmosphere?

Geophysical Research Letters, Volume 52, Issue 4, 28 February 2025.
Abstract It has been proposed that two isomers of the SO dimer (cis‐ and trans‐OSSO) are candidates for the unknown UV absorber in Venus' atmosphere because they have a good spectral match with the absorber, despite the low concentrations predicted by 1D photochemical models.
Joanna V. Egan, Wuhu Feng, Alexander D. James, James Manners, Daniel R. Marsh, Sébastien Lebonnois, Franck Lefèvre, Aurélien Stolzenbach, John M. C. Plane   +8 more
wiley   +1 more source

Atmospheric Circulation of Exoplanets

, 2009
We survey the basic principles of atmospheric dynamics relevant to explaining existing and future observations of exoplanets, both gas giant and terrestrial. Given the paucity of data on exoplanet atmospheres, our approach is to emphasize fundamental principles and insights gained from Solar-System studies that are likely to be generalizable to ...
Showman, Adam P., Cho, James Y-K., Menou, Kristen   +2 more
openaire   +2 more sources

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.
openaire   +6 more sources

Clouds in Partial Atmospheres of Lava Planets and Where to Find Them

The Astronomical Journal
With dayside temperatures hot enough to sustain a magma ocean and a silicate atmosphere, lava planets are the best targets for studying the atmosphere of a rocky world.
T. Giang Nguyen, Nicolas B. Cowan, Lisa Dang   +2 more
doaj   +1 more source

Observing transiting planets with JWST -- Prime targets and their synthetic spectral observations

, 2016
The James Webb Space Telescope will enable astronomers to obtain exoplanet spectra of unprecedented precision. Especially the MIRI instrument may shed light on the nature of the cloud particles obscuring planetary transmission spectra in the optical and ...
Bouwman, Jeroen, Henning, Thomas, Lagage, Pierre-Olivier, Min, Michiel, Mollière, Paul, van Boekel, Roy   +5 more
core   +1 more source

Superhabitable Planets Around Mid‐Type K Dwarf Stars Enhance Simulated JWST Observability and Surface Habitability

Astronomische Nachrichten, Volume 346, Issue 2, February 2025.
ABSTRACT In our search for life beyond the Solar System, certain planetary bodies may be more conducive to life than Earth. However, the observability of these “superhabitable” (SH) planets in the habitable zones around K dwarf stars has not been fully modeled. This study addresses this gap by modeling the atmospheres of SH exoplanets.
Iva Vilović, Jayesh Goyal, René Heller, Fanny Marie von Schauenburg   +3 more
wiley   +1 more source

The influence of forward-scattered light in transmission measurements of (exo)planetary atmospheres

, 2012
[Abridged] The transmission of light through a planetary atmosphere can be studied as a function of altitude and wavelength using stellar or solar occultations, giving often unique constraints on the atmospheric composition.
de Kok, R. J., Stam, D. M.
core   +1 more source

Novel Graphitic Oxynitrides as Photocatalysts for Sustainable H2 Production and CO2 Valorization. The Importance of Self‐Assembly for Catalytic Activity

ChemSusChem, Volume 18, Issue 3, February 1, 2025.
A novel subclass of graphitic oxynitrides, easily generated from otherwise abundant prebiotic monomers, namely cyanamide and glyoxal, debut in the scenario of sustainable heterogeneous catalysts, as demonstrated through applications to the highly demanding H2 and CO2 agendas.
Nieves Lavado, Rosario Pardo‐Botello, José María Sánchez‐Rodas, R. Fernando Martínez, Vicente Montes, Francisco Javier López‐Tenllado, Pedro Cintas, Reyes Babiano   +7 more
wiley   +1 more source