Post-flare thermal waves in the solar corona
Abstract
While imaging giant post-flare arches in the solar corona, the Hard X-Ray Spectrometer aboard the SMM detected thermal disturbances propagating through the corona after two-ribbon flares. The speed of propagation is close to, or below, 10 km s-1, and no obvious time-variation of the speed is indicated in the HXIS data. For subsequent two-ribbon flares in the same active region, these thermal disturbances (waves) exhibit highly homologous properties; thus the waves appear to propagate through preexisting arches formed after earlier flares. Temperatures of > 20 × 106 K have been detected in these moving phenomena. We suggest that we see here in X-rays upper products of the consecutive reconnections which create the post-flare loops below. Temperature maps in fine field of view of HXIS offer now a new possibility to detect postflare arches in the corona built during two-ribbon flares.
- Publication:
-
Advances in Space Research
- Pub Date:
- 1984
- DOI:
- 10.1016/0273-1177(84)90178-9
- Bibcode:
- 1984AdSpR...4g.179S
- Keywords:
-
- Coronal Loops;
- Solar Flares;
- Solar Temperature;
- Solar X-Rays;
- Thermal Instability;
- Wave Propagation;
- Homology;
- Solar Activity;
- Solar Maximum Mission;
- Solar Velocity;
- Thermal Mapping;
- Solar Physics