Solar Wind Induced Waves in the Skies of Mars: Ionospheric Compression, Energization, and Escape Resulting From the Impact of Ultralow Frequency Magnetosonic Waves Generated Upstream of the Martian Bow Shock
| Autor: | Jasper Halekas, Christian Mazelle, Joseph M. Grebowsky, Nick Omidi, David L. Mitchell, Suranga Ruhunusiri, R. A. Frahm, Glyn Collinson, Jared Espley, David G. Sibeck, Christopher M. Fowler, Yoshifumi Futaana, Lynn B. Wilson, Bruce Jakosky, Tielong Zhang |
|---|---|
| Přispěvatelé: | Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université de Toulouse (UT) |
| Rok vydání: | 2018 |
| Předmět: |
foreshock
010504 meteorology & atmospheric sciences Population Mars ionosphere 01 natural sciences Physics::Geophysics 0103 physical sciences ion energization Astrophysics::Solar and Stellar Astrophysics Interplanetary magnetic field education 010303 astronomy & astrophysics 0105 earth and related environmental sciences Martian Physics education.field_of_study Atmosphere of Mars Mars Exploration Program Geophysics Bow shocks in astrophysics ULF waves Solar wind solar wind [SDU]Sciences of the Universe [physics] Space and Planetary Science Physics::Space Physics Astrophysics::Earth and Planetary Astrophysics Ionosphere |
| Zdroj: | Journal of Geophysical Research: Space Physics Journal of Geophysical Research: Space Physics, 2018, 123, pp.7241-7256. ⟨10.1029/2018JA025414⟩ |
| ISSN: | 2169-9402 2169-9380 |
| Popis: | International audience; Using data from the National Aeronautics and Space Administration Mars Atmosphere and Voltatile EvolutioN and the European Space Agency Mars Express spacecraft, we show that transient phenomena in the foreshock and solar wind can directly inject energy into the ionosphere of Mars. We demonstrate that the impact of compressive ultralow frequency waves in the solar wind on the induced magnetospheres drive compressional, linearly polarized, magnetosonic ultralow frequency waves in the ionosphere, and a localized electromagnetic "ringing" at the local proton gyrofrequency. The pulsations heat and energize ionospheric plasmas. A preliminary survey of events shows that no special upstream conditions are required in the interplanetary magnetic field or solar wind. Elevated ion densities and temperatures in the solar wind near to Mars are consistent with the presence of an additional population of Martian ions, leading to ion-ion instablities, associated wave-particle interactions, and heating of the solar wind. The phenomenon was found to be seasonal, occurring when Mars is near perihelion. Finally, we present simultaneous multipoint observations of the phenomenon, with the Mars Express observing the waves upstream, and Mars Atmosphere and Voltatile EvolutioN observing the response in the ionosphere. When these new observations are combined with decades of previous studies, they collectively provide strong evidence for a previously undemonstrated atmospheric loss process at unmagnetized planets: ionospheric escape driven by the direct impact of transient phenomena from the foreshock and solar wind. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text