Broadband high-frequency waves detected at dipolarization fronts
Abstract
Dipolarization front (DF) is a sharp boundary most probably separating the reconnection jet from the background plasma sheet. So far at this boundary, the observed waves are mainly in low-frequency range (e.g., magnetosonic waves and lower hybrid waves). Few high-frequency waves are observed in this region. In this paper, we report the broadband high-frequency wave emissions at the DF. These waves, having frequencies extending from the electron cyclotron frequency fce, up to the electron plasma frequency fpe, could contribute 10% to the in situ measurement of intermittent energy conversion at the DF layer. Their generation may be attributed to electron beams, which are simultaneously observed at the DF as well.
- Publication:
-
Journal of Geophysical Research (Space Physics)
- Pub Date:
- April 2017
- DOI:
- 10.1002/2016JA023465
- Bibcode:
- 2017JGRA..122.4299Y
- Keywords:
-
- broadband high-frequency waves;
- dipolarization front;
- intermittent energy conversion