X-Ray Images of an Auroral Break-Up
- S.-I. Akasofu and
- J.R. Kan
Published Online: 26 MAR 2013
Copyright 1981 by the American Geophysical Union.
Physics of Auroral Arc Formation
How to Cite
Mauk, B. and Parks, G. K. (1981) X-Ray Images of an Auroral Break-Up, in Physics of Auroral Arc Formation (eds S.-I. Akasofu and J.R. Kan), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM025p0129
- Published Online: 26 MAR 2013
- Published Print: 1 JAN 1981
Print ISBN: 9780875900506
Online ISBN: 9781118664360
- Auroras—Addresses, essays, lectures
X-ray images have been obtained by a newly developed X-ray pin-hole camera during auroral breakups. A sequence of X-ray images sampled during the initiation of an auroral breakup shows the presence of a 20-km spot-like event that had a relatively steep energy spectrum superimposed on a more energetic component that was spatially uniform. The very intense acceleration which was observed subsequent to the spot event appears to have been an intensification of the harder component. These X-ray characteristics are reminiscent of the behavior of electron distributions on the equator during dispersionless injection events. At the equator, cool beam-like and hot isotropic populations often appear in coordination with each other. We suggest that the energy and spatial structures within the X-ray images reflect the details of the dynamics corresponding to the equatorial particles travelling along the geomagnetic field.