Results 121 to 130 of about 3,997 (213)

A Study of Kelvin‐Helmholtz Instability at Unmagnetized Planets by Finite Larmor Radius MHD

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Kelvin–Helmholtz instability (KHI) at unmagnetized planetary ionopauses plays a key role in driving solar wind–ionosphere coupling and planetary ion escape. We investigate KHI using a two‐dimensional finite Larmor radius (FLR) MHD model.
Caiyi Fei, Maodong Yan, Jiuhou Lei
wiley   +1 more source

Interdisciplinary Spectroscopy: The Detection and Characterization of Solar CMEs, Stellar CMEs, and Exoplanets

, 2022
In the field of Astrophysics, spectroscopic instruments have become a foundational component of the observers' toolkit when studying starlight.
Wilson, Maurice
core   +1 more source

Cross‐Scale Energy Transfer at Dipolarization Front in the Earth's Magnetotail

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Dipolarization front (DF) is a key structure for energy conversion and transport in planetary magnetotails. Although multiscale processes have been observed around DFs, quantitative analyses of cross‐scale coupling remain lacking. Here, we calculate cross‐scale transfer rate for different energy channels at a DF using Magnetospheric Multiscale
Xiujuan Ou, Zhihong Zhong, Meng Zhou, Yongyuan Yi, Binwen Ge, Runqing Jin, Qianyun Xu, Ye Pang, Xiaohua Deng   +8 more
wiley   +1 more source

Seasonal and Diurnal Variability of Thermospheric Metastable Helium Observed by Multi‐Platform Observations and Numerical Modeling

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Metastable helium (He∗ ${\text{He}}^{\ast }$) in the thermosphere emits at 1,083 nm and provides a powerful diagnostic of thermospheric composition, solar radiation, and transport. Its detection remains challenging because of its extremely low density and high‐altitude.
Zhenwei Liu, Chuan Huang, Jinru Cheng, Tangsheng Cheng, Hang Zhou, Chaomei Wu, Chen Liang, Tingdi Chen, Weilong Luo, Chong Wang, Zhaofeng Wang, Ruocan Zhao, Xianghui Xue   +12 more
wiley   +1 more source

Simulating Solar Neighborhood Brown Dwarfs. I. The Luminosity Function above and below the Galactic Plane

The Astrophysical Journal
Brown dwarfs form the key, yet poorly understood, link between stellar and planetary astrophysics. These objects offer unique tests of Galactic structure, but observational limitations have inhibited their large-scale analysis to date. Major upcoming sky
Easton J. Honaker, John E. Gizis
doaj   +1 more source

What does the local thin disc HRD tell us about the mass function, star formation history, and binary population? A Bayesian population synthesis study using the Gaia Catalogue of Nearby Stars

Astronomy & Astrophysics
Context. The solar neighbourhood encodes three of the most fundamental quantities in Galactic astrophysics: the initial mass function (IMF), the star formation history of the Milky Way thin disc, and the statistical properties of binary stars. Aims.
Dawson S., Schröder K.-P.
doaj   +1 more source

Planets, stars and stellar systems

, 2013
This is volume 3 of Planets, Stars and Stellar Systems, a six-volume compendium of modern astronomical research covering subjects of key interest to the main fields of contemporary astronomy. This volume on “Solar and Stellar Planetary Systems” edited by
Bond, Howard, McLean, Ian, Gilmore, Gerard, French, Linda, Keel, William, Oswalt, Terry, Barstow, Martin   +6 more
core   +1 more source

Quasi‐Homologous Solar Flares and Impacts on Thermospheric Density and Satellite Orbital Drag

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Quasi‐Homologous Flaring (QHF) activity from active regions on the Sun releases intense electromagnetic radiation in recurrent bursts over extended periods. In this letter, we present the effects of recurrent impulsive extreme ultraviolet (EUV) heating on thermospheric neutral density and the resulting atmospheric drag on satellites based on ...
S. Tulasi Ram, Princy K. Dubey, S. Mondal, Denny M. Oliveira, Jayashree Bulusu, Chinmaya Nayak, D. Rout, Anil Raghav, A. P. Dimri   +8 more
wiley   +1 more source

Measuring and Mapping Urban NO2 Pollution Heterogeneity Using a Custom Pandora Spectrometer Experiment and Observations From TEMPO

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 20, 28 October 2026.
Abstract Nitrogen dioxide (NO2) is a primary pollutant present at high concentrations in urban areas. Ground based measurements remain sparse and satellite observations rely on retrievals, so understanding intraurban, diurnal‐scale changes in NO2 is challenging.
R. H. Mooers, J. A. Geddes, C. Naughton, A. Pandey, B. K. Place, G. González Abad, N. Lombel   +6 more
wiley   +1 more source

Stellar Winds [PDF]

Stellar winds form an integral part of astronomy. The solar wind affects Earth\u27s magnetosphere, while the winds of hot massive stars are highly relevant for galactic feedback through their mechanical wind energy.
Vink, Jorick S.
core   +1 more source