Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27..365t&link_type=abstract
Planetary and Space Science, vol. 27, Apr. 1979, p. 365-384.
Astronomy and Astrophysics
Astronomy
16
Astronomical Models, Bow Waves, Energetic Particles, Particle Acceleration, Proton Energy, Shock Waves, Graphs (Charts), Interplanetary Medium, Spatial Distribution
Scientific paper
A Fermi-type acceleration model is constructed to explain the origin of energetic protons (30-100 keV) which have been observed upstream of the bow shock. It is shown that the suprathermal protons (with energy of several keV) can be accelerated up to several tens of keV through the Fermi-type process in which the reflection at the shock front and the scattering in the upstream region are coupled. The efficiency of the scattering process is estimated by using the result of Barnes' quasilinear treatment of the wave excitation. The resultant energy spectrum and flux intensity (1000-10,000 protons/(sq cm-s ster keV) in 32-45.3 keV) are consistent with the observation, and the softening of the energy spectrum observed in the dawn region can be explained by the decrease in the efficiency of the acceleration process in the dawn region due to the curvature of the bow shock and the reduction of shock strength.
No associations
LandOfFree
Origin of 30-100 keV protons observed in the upstream region of the earth's bow shock does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Origin of 30-100 keV protons observed in the upstream region of the earth's bow shock, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Origin of 30-100 keV protons observed in the upstream region of the earth's bow shock will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1437010