Cold Ionospheric Ions in the Magnetic Reconnection Outflow Region
| Autor: | Per-Arne Lindqvist, Cunguo Wang, Thomas E. Moore, Binbin Tang, Yuri V. Khotyaintsev, Michael O. Chandler, James L. Burch, Cecilia Norgren, Roy Torbert, S. A. Fuselier, Drew Turner, Wenya Li, Barbara L. Giles, D. T. Young, Christopher T. Russell, Mats André, Benoit Lavraud, Daniel B. Graham, Sergio Toledo-Redondo, Robert E. Ergun, Andris Vaivads, Craig J. Pollock |
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| 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) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
cold ion reconnection outflow 010504 meteorology & atmospheric sciences Magnetic reconnection Plasma Geophysics 01 natural sciences MMS Physics::Geophysics Ion Magnetosheath Space and Planetary Science Physics::Plasma Physics [SDU]Sciences of the Universe [physics] 0103 physical sciences Physics::Space Physics Astrophysics::Solar and Stellar Astrophysics Magnetopause Outflow Astrophysics::Earth and Planetary Astrophysics Ionosphere 010303 astronomy & astrophysics 0105 earth and related environmental sciences |
| Zdroj: | Journal of Geophysical Research: Space Physics Journal of Geophysical Research: Space Physics, 2017, 122, pp.10,194-10,202. ⟨10.1002/2017JA024287⟩ |
| DOI: | 10.1002/2017JA024287⟩ |
| Popis: | International audience; Magnetosheath plasma usually determines properties of asymmetric magnetic reconnection at the subsolar region of Earth's magnetopause. However, cold plasma that originated from the ionosphere can also reach the magnetopause and modify the kinetic physics of asymmetric reconnection. We present a magnetopause crossing with high-density (10-60 cm-3) cold ions and ongoing reconnection from the observation of the Magnetospheric Multiscale (MMS) spacecraft. The magnetopause crossing is estimated to be 300 ion inertial lengths south of the X line. Two distinct ion populations are observed on the magnetosheath edge of the ion jet. One population with high parallel velocities (200-300 km/s) is identified to be cold ion beams, and the other population is the magnetosheath ions. In the deHoffman-Teller frame, the field-aligned magnetosheath ions are Alfvénic and move toward the jet region, while the field-aligned cold ion beams move toward the magnetosheath boundary layer, with much lower speeds. These cold ion beams are suggested to be from the cold ions entering the jet close to the X line. This is the first observation of the cold ionospheric ions in the reconnection outflow region, including the reconnection jet and the magnetosheath boundary layer. |
| Databáze: | OpenAIRE |
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