Results 11 to 20 of about 319 (179)

Beyond the Electrostatic Approach: Numerical Simulations of Martian Ionospheric Irregularities

AGU Advances
Numerical simulations play an essential role in the study of ionospheric irregularities. In the past few decades, electrostatic simulations have successfully simulated the nonlinear evolution of terrestrial ionospheric irregularities.
Konghan Jiang, Jiuhou Lei, Maodong Yan
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Betatron cooling of electrons in the Martian ionosphere

Earth and Planetary Physics
Electron dynamics plays a crucial role in the evolution of the Martian ionosphere. However, the adiabatic process, a classical mechanism for modulating electron energy and pitch-angle distributions, has not been reported in this environment.
Xu Bai, ZuZheng Chen, HuiShan Fu, ZhiZhong Guo, WenDing Fu, TianYu Zhou, Zhe Wang, Jing Wang   +7 more
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In Situ Measurements of Thermal Ion Temperature in the Martian Ionosphere. [PDF]

J Geophys Res Space Phys, 2021
Abstract In situ measurements of ionospheric and thermospheric temperatures are experimentally challenging because orbiting spacecraft typically travel supersonically with respect to the cold gas and plasma. We present temperatures in Mars' ionosphere derived from data measured by the SupraThermal And Thermal Ion Composition ...
Hanley KG, McFadden JP, Mitchell DL, Fowler CM, Stone SW, Yelle RV, Mayyasi M, Ergun RE, Andersson L, Benna M, Elrod MK, Jakosky BM.   +11 more
europepmc   +4 more sources

The impact of a stealth CME on the Martian topside ionosphere [PDF]

Monthly Notices of the Royal Astronomical Society, 2021
ABSTRACT Solar cycle 24 is one of the weakest solar cycles recorded, but surprisingly the declining phase of it had a slow coronal mass ejection (CME) that evolved without any low coronal signature and is classified as a stealth CME that was responsible for an intense geomagnetic storm at Earth (Dst = −176 nT).
Smitha V Thampi, C Krishnaprasad, Govind G Nampoothiri, Tarun K Pant   +3 more
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Water and water ions in the Martian thermosphere/ionosphere [PDF]

Geophysical Research Letters, 2015
AbstractFirst results from the Neutral Gas and Ion Mass Spectrometer instrument on the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft reveal density profiles of protonated species that are mostly in good qualitative agreement with recent models of the Martian thermosphere/ionosphere. We present here the first photochemical model in which the
Fox, Jane L., Benna, M., Mahaffy, P., Jakosky, Bruce M.   +3 more
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Martian Ionosphere: A Component Due to Solar Protons [PDF]

Science, 1967
The small magnetic field strength observed near Mars by Mariner IV suggests that protons from the solar wind may enter the Martian atmosphere and produce ionization in addition to that produced by ultraviolet light and x-rays. It is found that solar protons produce a thin ionized layer at a rate of the order of 3 × 10 3
C, Sagan, J, Veverka
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Solar rotation effects on the Martian ionosphere [PDF]

Journal of Geophysical Research: Space Physics, 2014
AbstractWe present a detailed investigation of the solar rotation effects on the Martian high‐latitude (~63°N–81°N) ionosphere using the electron density (Ne) data measured by Mars Global Surveyor and solar XUV and EUV fluxes measured by SOHO under high (2000–2001), medium (2003), and low (2005) solar activity conditions.
N. Venkateswara Rao, N. Balan, A. K. Patra   +2 more
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Impact of Superthermal Electrons in the Mars’ lower Ionosphere [PDF]

Alfarama Journal of Basic & Applied Sciences
Recent research has increasingly focused on understanding ion escape from Mars' ionosphere, a phenomenon that contributes significantly to atmospheric loss.
Nour Asal, Mossad elmetwaaly, Ibraheem Elkamash, Waleed Moslem   +3 more
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Ion Heating in the Martian Ionosphere

Journal of Geophysical Research: Space Physics, 2017
AbstractEnergetic O+ and O ions with energies of up to a few hundred eV are observed in the Martian ionosphere. Corresponding ion velocity distributions show ion conics, suggesting that the observed ion populations have been heated perpendicular to the local magnetic field before experiencing a magnetic mirror force.
C. M. Fowler, R. E. Ergun, L. Andersson, W. K. Peterson, T. Hara, J. Mcfadden, J. Espley, J. Halekas, D. L. Mitchell, C. Mazelle, B. M. Jakosky   +10 more
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A Survey of Photoelectrons on the Nightside of Mars

Geophysical Research Letters, 2021
Despite produced exclusively on the dayside, photoelectrons, as an important population of the Martian ionosphere, have also been observed on the nightside.
Y. ‐T. Cao, J. Cui, X. ‐S. Wu, D. ‐D. Niu, H. ‐R. Lai, B. ‐B. Ni, Q. Luo, J. Yu, Y. Wei   +8 more
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