First Global Images of Ion Energization in the Terrestrial Foreshock by the Interstellar Boundary Explorer.

Autor: Dayeh MA; Space Science and Engineering Division Southwest Research Institute San Antonio TX USA.; Department of Physics and Astronomy University of Texas at San Antonio San Antonio TX USA., Szalay JR; Department of Astrophysical Sciences Princeton University Princeton NJ USA., Ogasawara K; Space Science and Engineering Division Southwest Research Institute San Antonio TX USA., Fuselier SA; Space Science and Engineering Division Southwest Research Institute San Antonio TX USA.; Department of Physics and Astronomy University of Texas at San Antonio San Antonio TX USA., McComas DJ; Department of Astrophysical Sciences Princeton University Princeton NJ USA., Funsten HO; ISR Division Los Alamos National Laboratory Los Alamos NM USA., Petrinec SM; Lockheed Martin Advanced Technology Center Palo Alto CA USA., Schwadron NA; Space Science Center University of New Hampshire Durham NH USA., Zirnstein EJ; Department of Astrophysical Sciences Princeton University Princeton NJ USA.
Jazyk: angličtina
Zdroj: Geophysical research letters [Geophys Res Lett] 2020 Aug 28; Vol. 47 (16), pp. e2020GL088188. Date of Electronic Publication: 2020 Aug 12.
DOI: 10.1029/2020GL088188
Abstrakt: The Interstellar Boundary Explorer (IBEX) mission provides global energetic neutral atom (ENA) observations from the heliosphere and the Earth's magnetosphere, including spatial, temporal, and energy information. IBEX views the magnetosphere from the sides and almost always perpendicular to noon-midnight plane. We report the first ENA images of the energization process in the Earth's ion foreshock and magnetosheath regions. We show ENA flux and spectral images of the dayside magnetosphere with significant energization of ENA plasma sources (above ~2.7 keV) in the region magnetically connected to the Earth's bow shock (BS) in its quasi-parallel configuration of the interplanetary magnetic field (IMF). We also show that the ion energization increases gradually with decreasing IMF-BS angle, suggesting more efficient suprathermal ion acceleration deeper in the quasi-parallel foreshock.
(©2020. The Authors.)
Databáze: MEDLINE
Externí odkaz: