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Title: Solitary Magnetic Structures Developed From Gyro-Resonance With Solar Wind Ions at Mars and Earth

Journal Article · · Geophysical Research Letters
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [7]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [4]
  1. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); OSTI
  2. Univ. of Iowa, Iowa City, IA (United States)
  3. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); Univ. of Maryland, College Park, MD (United States)
  4. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  5. Univ. of California, Los Angeles, CA (United States)
  6. Univ. of Colorado, Boulder, CO (United States); Imperial College, London (United Kingdom)
  7. Denali Scientific, Fairbanks, AK (United States)

We investigate solitary magnetic structures in the foreshock of Mars and Earth. The structures exhibit pulse-like magnetic field and density enhancements along with plasma heating and local solar wind (SW) ion reflection. The structures at Mars resemble the foreshock structures developed from ultra-low-frequency electromagnetic waves gyro-resonant with SW ions at Earth, and propagate toward the magnetosphere. We perform fully kinetic simulations to reproduce the solitary structures and the nonlinear evolution of ion distribution functions, illustrating their resonance with SW ions. The structures present self-induced foreshock turbulence that can have space weather effects. Our results advance the fundamental understanding of how SW interacts with planetary magnetospheres, and have potential impact on the current picture of planet-origin ion escape.

Research Organization:
Univ. of Maryland, College Park, MD (United States)
Sponsoring Organization:
National Aeronautics and Space Administration (NASA); National Science Foundation (NSF); USDOE Office of Science (SC)
Grant/Contract Number:
SC0020058
OSTI ID:
1978528
Journal Information:
Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 3 Vol. 49; ISSN 0094-8276
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English

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