Results 81 to 90 of about 1,043 (204)
The anisotropy of suprathermal electrons in the Martian ionosphere
Earth and Planetary PhysicsSuprathermal electrons are an important population of the Martian ionosphere, either produced by photoionization of atmospheric neutrals or supplied from the Solar Wind (SW). This study is dedicated to an in-depth investigation of the pitch angle distribution of suprathermal electrons at two representative energies, 19−55 eV and 124−356 eV, using the ...
YuTian Cao +5 more
openaire +2 more sources
Electrostatic Solitary Waves in Electronegative Martian Plasma
The Astrophysical JournalThe solar wind interacts with planetary magnetospheres, generating plasma waves in both the upstream region and the magnetospheric environment. Mars, lacking an inherent magnetic field, has an induced magnetosphere formed through solar wind interaction ...
Steffy Sara Varghese +3 more
doaj +1 more source
MARSIS Observations of the Martian Nightside Ionosphere During the September 2017 Solar Event
Geophysical Research Letters, 2018 We present topside ionospheric sounding on the nightside of Mars during the September 2017 solar event by Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) on board Mars Express along with complementary dayside observations from Mars ...
Y. Harada +7 more
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Earth and Planetary Physics, 2020 The present issue of Earth and Planetary Physics is dedicated to the near-space neutral and plasma environments of Mars. The issue includes nine papers that present new results on the properties of the Martian exosphere, ionosphere, and magnetosphere ...
Jun Cui +3 more
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Ionospheric Plasma Transported Into the Martian Magnetosheath
Geophysical Research LettersAbstract Heavy cold ions at Mars are gravitationally bound to the planet unless some process provides energy to them. Observations show that cold (<20 eV) and dense (∼>1 cm −3 ) O + /O 2 +
Sergey Shuvalov +5 more
openaire +2 more sources
Small scale magnetic structure in the induced Martian ionosphere and lower magnetic pile-up region [PDF]
, 2022 The data is in the form of an Excel file and contains data used for many of the figures in the 2022 J. Geophys. Res. paper at https://doi.org/10.1029/2021JA030139.
Andersson, Laila +3 more
core
C+ 133.5 nm Emission Mechanisms on Mars Revealed by the MAVEN Observations
The Astrophysical JournalC ^+ emission is generated by electron impact, dissociative ionization, photoionization, and resonant scattering with carbon-related atoms, molecules, and ions in the Martian ionosphere and thermosphere. The contribution of each mechanism to the emission,
Shotaro Sakai +15 more
doaj +1 more source
, 2017 We present multi-instrument observations of the effects of solar irradiance on the upper Martian ionosphere and escape fluxes based on Mars Express measurements obtained over almost 12 years. It is shown that the variations in the upper ionosphere caused
Barabash, S. +20 more
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Model-Observation Comparisons of O+ Concentrations in the Martian Ionosphere
, 2023 A few years ago, the charge-transfer reaction CO2+ + O ⟶ O+ + CO2 was investigated experimentally for the first time since the study by Fehsenfeld et al., (1970). This new investigation was conducted by Tenewitz et al., (2018).
Nagar, Chinmaya
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Excitation of plasma waves by unstable photoelectron and thermal electron populations on closed magnetic field lines in the Martian ionosphere [PDF]
, 2005 International audienceIt is argued that anisotropic electron pitch angle distributions in the closed magnetic field regions of the Martian ionosphere gives rise to excitation of plasma instabilities. We discuss two types of instabilities that are excited
E. Nielsen +3 more
core +1 more source