Results 61 to 70 of about 2,351 (233)

The Possible Role of Penning Ionization Processes in Planetary Atmospheres

Atmosphere, 2015
In this paper we suggest Penning ionization as an important route of formation for ionic species in upper planetary atmospheres. Our goal is to provide relevant tools to researchers working on kinetic models of atmospheric interest, in order to include ...
Stefano Falcinelli, Fernando Pirani, Franco Vecchiocattivi   +2 more
doaj   +1 more source

Solar-wind control of the extent of planetary ionospheres [PDF]

In our solar system there are at least four magnetic planets: Earth, Jupiter, Mercury, and Mars; while at least one planet, Venus, appears to be essentially nonmagnetic. The ionospheres of the magnetic planets are imbedded in their magnetosphere and thus
Bauer, S. J.
core   +1 more source

Observations of High‐Resolution Two‐Dimensional Ionospheric Flow Dynamics Associated With Poleward Boundary Intensifications

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Poleward boundary intensifications (PBIs) are one of the most common auroral disturbances and have been shown to play a key role in substorm dynamics. PBIs are commonly interpreted as the ionospheric signature of magnetotail reconnection, providing insight into X‐line evolution.
Katherine Davidson, Yukitoshi Nishimura, Larry Lyons, Eric Donovan, Vassilis Angelopoulos, Nozomu Nishitani   +5 more
wiley   +1 more source

Influence of the Eccentric Geomagnetic Dipole on Longitude Variations of Compressional Upstream Wave Amplitudes in the Topside Ionosphere: Results From the MSS‐1A Satellite

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Based on 2‐year magnetic data from the Macau science satellite, we investigate the compressional Pc3‐4 pulsations (between 16 and 100 mHz) driven by upstream waves (UWs). Our results confirm larger UWs amplitudes in the South Atlantic Anomaly (SAA) longitudes, agreeing with previous missions.
Chao Xiong, Haibin Liu, Hermann Lühr, Chunyu Xu   +3 more
wiley   +1 more source

The Response of the Martian Ion Precipitation to Extreme Solar Events

The Astrophysical Journal
Ion precipitation is a major driver of sputtering on Mars, yet its behavior under extreme solar wind conditions remains poorly characterized. Using MAVEN observations, we analyze 124 extreme solar wind events from 2014 to 2018 together with a unique ...
Xinzhi Qiu, Yiqun Yu, Longhui Liu, Yu Yan, Jinbin Cao   +4 more
doaj   +1 more source

Infrared Rugates by Molecular Beam Epitaxy [PDF]

Rugates are optical structures that have a sinusoidal index of refraction (harmonic gradient-index field). As their discrete high/ low index filter counterparts, they can be used as narrow rejection band filters. However, since rugates do not have abrupt
Rona, M.
core   +1 more source

Observations of the Magnetopause Reconnection Ion Diffusion Region With High‐Density O+ Ions During the May 2024 Superstorm

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Based on high‐resolution measurements from NASA's Magnetospheric Multiscale mission (MMS), we present the first direct observation of an ion diffusion region (IDR) with high number density O+ ions within dayside magnetopause reconnection during the May 2024 superstorm. The O+ ion density reaches a high value of ∼3.3 cm−3.
Anxin Zhang, Suping Duan, Lei Dai, Yuntian Hou, Yong Ren, Chi Wang, S. A. Fuselier, C. Philippe Escoubet, James L. Burch   +8 more
wiley   +1 more source

Temperatures of Jupiter’s Upper Atmosphere: The Role of the Planetary Magnetic Field

The Astrophysical Journal Letters
The primary source of heating in the upper atmospheres (thermospheres) of giant planets has been the subject of long debate. The conundrum (or “energy crisis”) consists in observed thermosphere temperatures at low and midlatitudes exceeding values ...
Ingo C. F. Müller-Wodarg, Peio Iñurrigarro, Luke Moore, Tommi T. Koskinen, Alexander S. Medvedev   +4 more
doaj   +1 more source

Arbitrary amplitude ion-acoustic solitary and shock waves in an unmagnetized electron–proton–ion nonthermal plasma [PDF]

AIP Advances
This study thoroughly examines the features of arbitrary amplitude ion-acoustic nonlinear structures, including both solitary and shock waves (double layers), in an unmagnetized electron–proton–ion plasma where electrons follow Cairns distributions and ...
Weaam Alhejaili, Muhammad Khalid, Sahibzada I. H. Bacha, Alim Alim, Samir A. El-Tantawy   +4 more
doaj   +1 more source

Solar-wind interaction with planetary ionospheres [PDF]

Planetary encounters by numerous spacecraft have furnished information concerning the solar wind interaction with the planets Mercury, Venus, Mars, and Jupiter.
Cloutier, P. A.
core   +1 more source