Electron heating and phase space signatures at strong and weak quasi-perpendicular shocks
نویسندگان
چکیده
منابع مشابه
Proton and electron acceleration by quasi-perpendicular fast magnetosonic shocks in interplanetary space
Recent observations from the Ulysses spacecraft (Simnett 2003, Sol. Phys., 213, 387) have measured the energy spectrum of the ambient ions associated with the passage of a fast magnetosonic quasi-perpendicular shock driven by a coronal mass ejection (CME). Near the shock front the energy spectrum of the accelerated ions, which are predominantly protons, exhibits features (maxima) at about 250 k...
متن کامل6 Electron Injection at High Mach Number Quasi - Perpendicular Shocks : Surfing and Drift Acceleration
Electron injection process at high Mach number collisionless quasi-perpendicular shock waves is investigated by means of one-dimensional electromagnetic particle-in-cell simulations. We find that energetic electrons are generated through the following two steps : (1) electrons are accelerated nearly perpendicular to the local magnetic field by shock surfing acceleration at the leading edge of t...
متن کاملPickup protons at quasi-perpendicular shocks: full particle electrodynamic simulations
We have performed 3 one-dimensional full particle electromagnetic simulations of a quasi-perpendicular shock with the same Alfvén Mach number MA∼5, shock normal-magnetic field angle 2Bn=87 and ion and electron beta (particle to magnetic field pressure) of 0.1. In the first run we used an ion to electron mass ratio close to the physical one (mi/me=1024). As expected from previous high mass ratio...
متن کاملStructure and Stationarity of Quasi-perpendicular Shocks: Numerical simulations
This paper presents an overview of numerical simulation studies of fast collisionless shocks and compares these simulation results with observations of the Earth’s bow shock and theoretical works. Especially, we review the structure and stationarity of the supercritical quasi-perpendicular shocks. In situ observations indicate that these shocks are generally quasi-stationary whereas full partic...
متن کاملLow-frequency whistler waves and shocklets observed at quasi-perpendicular interplanetary shocks
[1] We present observations of low-frequency waves (0.25 Hz < f < 10 Hz) at five quasi-perpendicular interplanetary (IP) shocks observed by the Wind spacecraft. Four of the five IP shocks had oblique precursor whistler waves propagating at angles with respect to the magnetic field of 20 –50 and large propagation angles with respect to the shock normal; thus they do not appear to be phase standi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Geophysical Research: Space Physics
سال: 1998
ISSN: 0148-0227
DOI: 10.1029/97ja03058