Energetic electrons in the exterior cusp: identifying the source

Energetic electrons in the exterior cusp: identifying the source

A case study is presented to test the role several different sources may play in populating the exterior cusp with energetic (<I>E</I>&gt;40 keV) electrons. The properties of the electrons measured in the exterior cusp are compared with the expected signatures of three sources in...

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Main Authors: B. M. Walsh, T. A. Fritz, M. M. Klida, J. Chen
Format: Article
Language:English
Published: Copernicus Publications 2010-04-01
Series:Annales Geophysicae
Online Access:https://www.ann-geophys.net/28/983/2010/angeo-28-983-2010.pdf
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spelling doaj-ad6b927abd0e49bfa11922410524ffd52020-11-24T23:21:13ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762010-04-012898399210.5194/angeo-28-983-2010Energetic electrons in the exterior cusp: identifying the sourceB. M. Walsh0T. A. Fritz1M. M. Klida2J. Chen3Center for Space Physics, Boston University, Boston, MA, USACenter for Space Physics, Boston University, Boston, MA, USACenter for Space Physics, Boston University, Boston, MA, USACenter for Space Physics, Boston University, Boston, MA, USAA case study is presented to test the role several different sources may play in populating the exterior cusp with energetic (<I>E</I>&gt;40 keV) electrons. The properties of the electrons measured in the exterior cusp are compared with the expected signatures of three sources in order to weigh the role each source may contribute in populating this region. The potential sources probed are: (1) solar energetic electrons entering the cusp from the solar wind; (2) an equatorial magnetospheric source with particles drifting to high latitudes on the dayside; and (3) a local source accelerating the electrons in situ. From the observations it is likely that local acceleration is the primary source of the energetic electrons in the exterior cusp during this event.https://www.ann-geophys.net/28/983/2010/angeo-28-983-2010.pdf
collection DOAJ
language English
format Article
sources DOAJ
author B. M. Walsh
T. A. Fritz
M. M. Klida
J. Chen
spellingShingle B. M. Walsh
T. A. Fritz
M. M. Klida
J. Chen
Energetic electrons in the exterior cusp: identifying the source
Annales Geophysicae
author_facet B. M. Walsh
T. A. Fritz
M. M. Klida
J. Chen
author_sort B. M. Walsh
title Energetic electrons in the exterior cusp: identifying the source
title_short Energetic electrons in the exterior cusp: identifying the source
title_full Energetic electrons in the exterior cusp: identifying the source
title_fullStr Energetic electrons in the exterior cusp: identifying the source
title_full_unstemmed Energetic electrons in the exterior cusp: identifying the source
title_sort energetic electrons in the exterior cusp: identifying the source
publisher Copernicus Publications
series Annales Geophysicae
issn 0992-7689
1432-0576
publishDate 2010-04-01
description A case study is presented to test the role several different sources may play in populating the exterior cusp with energetic (<I>E</I>&gt;40 keV) electrons. The properties of the electrons measured in the exterior cusp are compared with the expected signatures of three sources in order to weigh the role each source may contribute in populating this region. The potential sources probed are: (1) solar energetic electrons entering the cusp from the solar wind; (2) an equatorial magnetospheric source with particles drifting to high latitudes on the dayside; and (3) a local source accelerating the electrons in situ. From the observations it is likely that local acceleration is the primary source of the energetic electrons in the exterior cusp during this event.
url https://www.ann-geophys.net/28/983/2010/angeo-28-983-2010.pdf
work_keys_str_mv AT bmwalsh energeticelectronsintheexteriorcuspidentifyingthesource
AT tafritz energeticelectronsintheexteriorcuspidentifyingthesource
AT mmklida energeticelectronsintheexteriorcuspidentifyingthesource
AT jchen energeticelectronsintheexteriorcuspidentifyingthesource
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