Title: Relativistic electron response to the combined magnetospheric impact of a coronal mass ejection overlapping with a high-speed stream: Van Allen Probes observations

Abstract

During early November 2013, the magnetosphere experienced concurrent driving by a coronal mass ejection (CME) during an ongoing high-speed stream (HSS) event. The relativistic electron response to these two kinds of drivers, i.e., HSS and CME, is typically different, with the former often leading to a slower buildup of electrons at larger radial distances, while the latter energizing electrons rapidly with flux enhancements occurring closer to the Earth. In this paper, we present a detailed analysis of the relativistic electron response including radial profiles of phase space density as observed by both Magnetic Electron and Ion Sensor (MagEIS) and Relativistic Electron Proton Telescope instruments on the Van Allen Probes mission. Data from the MagEIS instrument establish the behavior of lower energy (<1 MeV) electrons which span both intermediary and seed populations during electron energization. Measurements characterizing the plasma waves and magnetospheric electric and magnetic fields during this period are obtained by the Electric and Magnetic Field Instrument Suite and Integrated Science instrument on board Van Allen Probes, Search Coil Magnetometer and Flux Gate Magnetometer instruments on board Time History of Events and Macroscale Interactions during Substorms, and the low-altitude Polar-orbiting Operational Environmental Satellites. These observations suggest that during this timemore » period, both radial transport and local in situ processes are involved in the energization of electrons. Finally, the energization attributable to radial diffusion is most clearly evident for the lower energy (<1 MeV) electrons, while the effects of in situ energization by interaction of chorus waves are prominent in the higher-energy electrons.« less

Authors:

Kanekal, S. G. ^[1]; Baker, D. N. ^[2]; Henderson, M. G. ^[3]; Li, W. ^[4]; Fennell, J. F. ^[5]; Zheng, Y. ^[1]; Richardson, I. G. ^[6]; Jones, A. ^[7]; Ali, A. F.  ^[2];

• Search DOE PAGES for author "Ali, A. F."
• Search DOE PAGES for ORCID "0000-0003-2981-5791"

Elkington, S. R. ^[2]; Jaynes, A. ^[2]; Li, X. ^[1]; Blake, J. B. ^[5]; Reeves, G. D.  ^[3];

• Search DOE PAGES for author "Reeves, G. D."
• Search DOE PAGES for ORCID "0000-0002-7985-8098"

Spence, H. E. ^[8]; Kletzing, C. A. ^[9]

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+ Show Author Affiliations

1. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
2. Univ. of Colorado, Boulder, CO (United States). Lab. for Atmospheric and Space Physics
3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
4. Univ. of California, Los Angeles, CA (United States). Dept. of Atmospheric and Oceanic Sciences
5. Aerospace Corporation, Los Angeles, CA (United States)
6. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); Univ. of Maryland, College Park, MD (United States). Dept. of Astronomy. Center for Research and Exploration in Space Science & Technology (CRESST)
7. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); The Catholic Univ. of America, Washington, DC (United States). Physics Dept.
8. Univ. of New Hampshire, Durham, NH (United States). Inst. for Study of Earth, Oceans, and Space
9. Univ. of Iowa, Iowa City, IA (United States). Dept. of Physics and Astronomy

Publication Date:

Tue Sep 01 00:00:00 EDT 2015

Research Org.:

Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); Univ. of California, Los Angeles, CA (United States); Univ. of Colorado, Boulder, CO (United States); Aerospace Corporation, Los Angeles, CA (United States)

Sponsoring Org.:

USDOE; National Aeronautics and Space Administration (NASA); National Science Foundation (NSF)

OSTI Identifier:

1467364

Report Number(s):

LA-UR-15-28237
Journal ID: ISSN 2169-9380

Grant/Contract Number:  

AC52-06NA25396; NAS5-01072; 967399; 1001057397:01; 13-041; NNX11AD75G; NNX11AR64G; NNX13AI61G; NNX15AF61G; AGS 1405054

Resource Type:

Accepted Manuscript

Journal Name:

Journal of Geophysical Research. Space Physics

Additional Journal Information:

Journal Volume: 120; Journal Issue: 9; Journal ID: ISSN 2169-9380

Publisher:

American Geophysical Union

Country of Publication:

United States

Language:

English

Subject:

79 ASTRONOMY AND ASTROPHYSICS; relativistic electrons; IP shock; CME; HSS