Results 71 to 80 of about 58,337 (174)

Lyα Emission from K and M Dwarfs: Intrinsic Profiles, Variability, and Flux in the Habitable Zone

Astrophysical Journal
Lyman-alpha (Lyα) is the most prominent ultraviolet (UV) emission line in low-mass stars, playing a crucial role in exoplanet atmospheric photochemistry, heating, and escape.
Sarah Peacock, Travis S. Barman, R. Loyd, Adam C. Schneider, Allison Youngblood, K. G. Carpenter, E. Shkolnik   +6 more
semanticscholar   +1 more source

The Role of Planetary Rotation in Polar Cusp Localization

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract Juno observations have revealed that Jupiter's polar cusps are displaced toward dusk and even the nightside, contradicting the Earth‐derived paradigm that is confined to narrower ranges near noon. These findings underscore the overlooked influence of planetary rotation on magnetospheric dynamics, exposing a critical gap in current theoretical ...
Junjie Chen, Peter A. Delamere, William Lotko, Yan Xu, Zhonghua Yao, Oliver Brambles, Enhao Feng, Ziyi Yang, Kevin H. Pham, Binzheng Zhang   +9 more
wiley   +1 more source

Transmission Spectroscopy of the Lowest-density Gas Giant: Metals and a Potential Extended Outflow in HAT-P-67b

The Astronomical Journal, 2023
Extremely low-density exoplanets are tantalizing targets for atmospheric characterization because of their promisingly large signals in transmission spectroscopy.
Aaron Bello-Arufe, Heather A. Knutson, João M. Mendonça, Michael M. Zhang, Samuel H. C. Cabot, Alexander D. Rathcke, Ana Ulla, Shreyas Vissapragada, Lars A. Buchhave   +8 more
doaj   +1 more source

The effects of terrestrial exoplanet bulk composition on long-term planetary evolution

, 2020
With more observations of terrestrial exoplanets becoming available every year, the importance of geodynamical studies focusing on exoplanets is increasing. We know from observations that stellar chemical abundances vary in the Solar neighbourhood, which
R. Spaargaren, Haiyang S. Wang, M. Ballmer, S. Mojzsis, P. Tackley   +4 more
semanticscholar   +1 more source

The Impact of the Sulfur Allotropes and Sulfur Hydrides on the Venus Cloud Chemistry

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Venus is home to vivid sulfur chemistry, with SO2 ${\text{SO}}_{2}$ as the major sulfur gas species and a global cloud layer between 47 and 70 km composed of H2SO4 ${\mathrm{H}}_{2}{\text{SO}}_{4}$ and H2 ${\mathrm{H}}_{2}$O. The chemistry in the clouds has been extensively studied with 1D models, but none is able to reproduce the three orders
Maxence Lefèvre, Franck Lefèvre, Anni Määttänen, Robert Skog, Benjamin Frandsen, Aurélien Stolzenbach, Ashwin Braude   +6 more
wiley   +1 more source

Modeling the Seasonality of Wind‐Driven Hydrocarbon Waves in Titan's Polar Lakes

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Titan, the only body in the solar system aside from Earth with standing liquids on its surface, has high‐latitude hydrocarbon lakes and seas. As Titan's atmosphere generates light winds, there should be waves on the surface of these lakes and seas, yet, direct wave observations are scant.
Charlene E. Detelich, Una G. Schneck, Alexander G. Hayes, Milan Curcic, Rose V. Palermo, Andrew D. Ashton, J. Taylor Perron, Juan M. Lora, Jordan Steckloff   +8 more
wiley   +1 more source

Reassessing Ocean Retention Rates: The Role of Ocean Formation Time Assumptions in Rocky Exoplanet Studies

Research Notes of the AAS
In this work, we aim to model ocean and atmospheric mass loss in exoplanets with varying orbital parameters to assess the impact of simulation assumptions on conclusions on planetary habitability.
Lailyn Borum, J. Becker
semanticscholar   +1 more source

Volcanism at Piton de la Fournaise as an Analog for Chloris Mons, Venus

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Identifying and investigating terrestrial analogs for Venus volcanic activity is necessary to prepare for the planned upcoming missions to Venus. We propose volcanism at Piton de la Fournaise, a frequently active oceanic shield volcano, as an analog to volcanism at Chloris Mons, Venus.
Evan G. K. Cooper, Ian T. W. Flynn, Sean I. Peters, Elliott W. Benson, Sara B. Murphy, Eleanor D. Sterling   +5 more
wiley   +1 more source

Impacts of Carbon Dioxide Deposition on Martian Near‐Surface Wave Activity

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract A prominent feature of Mars' winter atmosphere is near‐surface baroclinic wave activity. These waves exert strong control on dust storm variability and contribute to transport of heat, momentum, and dust. Using a suite of Mars general circulation model simulations, we investigate an underexplored connection between near‐surface wave activity ...
Hung Kwan Fok, Anthony Toigo, Darryn Waugh   +2 more
wiley   +1 more source

Hot Spot Offset Variability from Magnetohydrodynamical Thermoresistive Instability in Hot Jupiters

The Astrophysical Journal
Hot Jupiter (HJ) atmospheres are possibly subject to a thermoresistive instability (TRI). Such an instability may develop as the ohmic heating increases the electrical conductivity in a positive feedback loop, which ultimately leads to a runaway of the ...
Raphaël Hardy, Paul Charbonneau, Andrew Cumming   +2 more
doaj   +1 more source