This article has an erratum: [https://doi.org/10.1051/0004-6361:20053503e]
Volume 440, Number 2, September III 2005
|Page(s)||759 - 766|
|Section||Planets and planetary systems|
|Published online||01 September 2005|
Proton and electron acceleration by quasi-perpendicular fast magnetosonic shocks in interplanetary space
School of Physics & Astronomy, University of Birmingham, Birmingham B15 2TT, UK e-mail: firstname.lastname@example.org
2 Laboratory for Plasma Astrophysics, Toyama University, Toyama 930-8555, Japan
3 Blackett Laboratory, Imperial College of Science, Technology and Medicine, London SW7 2BZ, UK
Accepted: 30 May 2005
Recent observations from the 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 keV-1.5 MeV. We show that these are the right order of magnitude for protons which have been accelerated by the surfatron mechanism at a fast magnetosonic shock wave propagating perpendicular to the ambient magnetic field. The in situ measurements therefore illustrate directly that this mechanism could possibly be responsible for interplanetary particle acceleration. The shock is also accompanied by an increase in the near-relativistic electron intensity of almost two orders of magnitude. We present a similar event observed by the ACE spacecraft.
Key words: miscellaneous
© ESO, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.