Time delays in large and small loop thermal models for hard X-ray bursts

✍ Scribed by Dean F. Smith; Lorant A. Muth

• Publisher: Springer
• Year: 1984
• Tongue: English
• Weight: 568 KB
• Volume: 90
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00153786

✦ Synopsis

The time histories of the emission at 10, 30, and 100 keV averaged over the loop from small and large loop thermal models of hard X-ray emission are studied. The small (15 000 km) loop cases show a characteristic delay in the peak of the 100 keV emission relative to the 30 keV emission of about 1.5 s which should be detectable. The large (47 000 kin) loop cases show no delay, but in the case of a continuous energy input, the 30 keV emission has a peak at 9.5 s whereas the 100 keV emission rises monotonically. Again, this difference should be detectable to the extent that it is not washed out by a dominant beam or escaping tail component which is not considered in this paper. A large loop case where only classical and saturated heat conduction are allowed is considered. The 30 keV emission has a peak at 7.5 s whereas the 100 keV emission rises monotonically. The peak temperature reached is 8 x 10 7 K and the probability of finding examples in the data uncontaminated by a dominant beam or escaping tail component should be considerably higher than in the cases with higher rates of energy input.