Results 91 to 100 of about 2,811,519 (263)

ATMOSPHERIX: III. Estimating the C/O ratio and molecular dynamics at the limbs of WASP-76 b with SPIRou [PDF]

Astronomy & Astrophysics
Measuring the abundances of C- and O-bearing species in exoplanet atmospheres enables us to constrain the C/O ratio, which contains indications about the planet formation history.
T. Hood, F. Debras, C. Moutou, Baptiste Klein, P. Tremblin, V. Parmentier, Andrés Carmona, A. Meech, Olivia V'enot, A. Masson, Pascal Petit, Sandrine Vinatier, E. Martioli, F. Kiefer, M. Turbet, the Atmospherix consortium   +15 more
semanticscholar   +1 more source

Impact of Stellar Dynamics on the Frequency of Giant Planets in Close Binaries [PDF]

, 2006
Hostile tidal forces may inhibit the formation of Jovian planets in binaries with semimajor axes of ≾50 AU, binaries that might be called "close" in this context. As an alternative to in situ planet formation, a binary can acquire a giant planet when one
Muterspaugh, Matthew, Pfahl, Eric
core   +2 more sources

Long‐Lasting Volcanism of the Moon Aided by the Switch in Dominant Mechanisms of Magma Ascent: Role of Localized Radioactive Enrichment in a Numerical Model of Magmatism and Mantle Convection

Geophysical Research Letters, Volume 52, Issue 8, 28 April 2025.
Abstract Significant volcanic activity continued for billions of years since 3.5–4 Gyr ago in the Procellarum KREEP Terrane (PKT) of the Moon, but not so significant outside the PKT. To understand this volcanic history, we developed a 2‐D numerical model of magmatism and mantle convection; the effects of the PKT on lunar evolution are considered by ...
Ken'yo U, Masanori Kameyama, Gaku Nishiyama, Takehiro Miyagoshi, Masaki Ogawa   +4 more
wiley   +1 more source

The role of boundary‐layer friction in modulating midlatitude heatwaves

Quarterly Journal of the Royal Meteorological Society, Volume 151, Issue 768, April 2025 Part A.
Boundary‐layer friction associated with different surface types plays an important role in modulating heatwaves in the midlatitudes. The main changes in heatwave features occur when locally modifying boundary‐layer friction along the jet‐stream axis. Real‐world differences in the occurrence of heatwaves between different locations in the midlatitudes ...
E. Russo, W. Wicker, D. Folini, D. I. V. Domeisen   +3 more
wiley   +1 more source

Traveling Planetary-scale Waves Cause Cloud Variability on Tidally Locked Aquaplanets

The Planetary Science Journal, 2023
Cloud cover at the planetary limb of water-rich Earth-like planets is likely to weaken chemical signatures in transmission spectra, impeding attempts to characterize these atmospheres.
Maureen Cohen, Massimo A. Bollasina, Denis E. Sergeev, Paul I. Palmer, Nathan J. Mayne   +4 more
doaj   +1 more source

Thermophysical States of MgSiO3 Liquid up to Terapascal Pressures: Implications for Magma Oceans in Super‐Earths and Sub‐Neptunes

Journal of Geophysical Research: Planets, Volume 130, Issue 4, April 2025.
Abstract Thermophysical properties of silicate liquids under extreme conditions are critical for understanding the accretion and evolution of super‐Earths and sub‐Neptunes. The thermal equation of state and viscosity of silicate liquids determine the adiabatic profiles and dynamics of magma oceans. However, these properties are challenging to constrain
Haiyang Luo, Jie Deng
wiley   +1 more source

Surrounded by Giants: Habitable Zone Stability Within the HD 141399 System

The Astronomical Journal, 2023
The search for exoplanets has revealed a diversity of planetary system architectures, the vast majority of which diverge significantly from the template of the solar system.
Stephen R. Kane
doaj   +1 more source

An Observational Diagnostic for Distinguishing between Clouds and Haze in Hot Exoplanet Atmospheres [PDF]

, 2017
The nature of aerosols in hot exoplanet atmospheres is one of the primary vexing questions facing the exoplanet field. The complex chemistry, multiple formation pathways, and lack of easily identifiable spectral features associated with aerosols make it ...
E. Kempton, J. Bean, V. Parmentier
semanticscholar   +1 more source

The Effects of Irradiation on Hot Jovian Atmospheres: Heat Redistribution and Energy Dissipation

, 2012
Hot Jupiters, due to the proximity to their parent stars, are subjected to a strong irradiating flux which governs their radiative and dynamical properties.
Batygin, Bodenheimer, Burkert, Burrows, Burrows, Burrows, Burrows, Burrows, Cowan, Cowan, Crossfield, Demory, Dobbs-Dixon, Fortney, Fortney, Fortney, Frédéric Pont, Goody, Guillot, Harrington, Heng, Hubeny, Ibgui, Jackson, Kevin Heng, Knutson, Knutson, Knutson, Kundu, Lewis, Li, Liu, Menou, Menou, Miller, Perna, Perna, Pierrehumbert, Rauscher, Rosalba Perna, Showman, Todorov, Winn, Youdin, Zel'dovich   +44 more
core   +1 more source

Stability of Proton Superoxide and its Superionic Transition Under High Pressure

Advanced Science, Volume 12, Issue 9, March 6, 2025.
The study predicts the stable proton superoxide (HO2) under extreme conditions using Density Functional Theory (DFT)‐based crystal structure prediction. HO2 exhibits metallic behavior at high pressure, transitions to an insulator under reduced pressure, and becomes superionic with high electrical conductivity under elevated temperatures.
Zifan Wang, Wenge Yang, Duck Young Kim
wiley   +1 more source