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

M. A. Dayeh; J. R. Szalay; K. Ogasawara; S. A. Fuselier; D. J. McComas; H. O. Funsten; S. M. Petrinec; N. A. Schwadron; E. J. Zirnstein

doi:10.1029/2020GL088188

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

M. A. Dayeh, J. R. Szalay, K. Ogasawara, S. A. Fuselier, D. J. McComas, H. O. Funsten, S. M. Petrinec, N. A. Schwadron, E. J. Zirnstein

Astrophysical Sciences

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6 Scopus citations

Abstract

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.

Original language	English (US)
Article number	e2020GL088188
Journal	Geophysical Research Letters
Volume	47
Issue number	16
DOIs	https://doi.org/10.1029/2020GL088188
State	Published - Aug 28 2020

All Science Journal Classification (ASJC) codes

Geophysics
General Earth and Planetary Sciences

Keywords

charge-exchange
energetic neutral atoms
ion acceleration

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10.1029/2020GL088188

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@article{70e17747873e4a64b4a03c76fe77fea5,

title = "First Global Images of Ion Energization in the Terrestrial Foreshock by the Interstellar Boundary Explorer",

abstract = "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.",

keywords = "charge-exchange, energetic neutral atoms, ion acceleration",

author = "Dayeh, {M. A.} and Szalay, {J. R.} and K. Ogasawara and Fuselier, {S. A.} and McComas, {D. J.} and Funsten, {H. O.} and Petrinec, {S. M.} and Schwadron, {N. A.} and Zirnstein, {E. J.}",

note = "Publisher Copyright: {\textcopyright}2020. The Authors.",

year = "2020",

month = aug,

day = "28",

doi = "10.1029/2020GL088188",

language = "English (US)",

volume = "47",

journal = "Geophysical Research Letters",

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AU - Dayeh, M. A.

AU - Szalay, J. R.

AU - Ogasawara, K.

AU - Fuselier, S. A.

AU - McComas, D. J.

AU - Funsten, H. O.

AU - Petrinec, S. M.

AU - Schwadron, N. A.

AU - Zirnstein, E. J.

PY - 2020/8/28

Y1 - 2020/8/28

N2 - 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.

AB - 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.

KW - charge-exchange

KW - energetic neutral atoms

KW - ion acceleration

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ER -

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

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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