Fast transients in hard X-ray solar flares
โ Scribed by Alan L. Kiplinger; B. R. Dennis; A. Gordon Emslie; K. J. Frost; L. E. Orwig
- Publisher
- Springer
- Year
- 1983
- Tongue
- English
- Weight
- 69 KB
- Volume
- 86
- Category
- Article
- ISSN
- 0038-0938
No coin nor oath required. For personal study only.
โฆ Synopsis
We present the results of a search for fast spikes in 5483 hard X-ray solar flares as observed with the Hard X-Ray Burst Spectrometer on the Solar Maximum Mission (SMM). Hundreds of fast spikes with durations of less than I second have been detected at time resolutions of |28 ms and 10 ms. Fast spikes have been detected with rise and decay times as short as 20 ms and with widths as short at 45 ms that represent the fastest hard X-ray variations yet seen from the Sun. The observations of such fast variations place new constraints on the physical nature of the source.
๐ SIMILAR VOLUMES
The dynamics of hard X-ray producing electron beams in solar flares can be strongly affected by the occurrence of a reverse current. The parameter diagram for a beam can be divided into three regimes, one of which is the usual thick target case, the two others being due to two different possible con
The polarization of hard solar X-radiation (> l0 keV) is calculated on the assumption that electrons get a non-isotropic velocity distribution in the initial phase of a flare. The bremsstrahlung generated by nonthermal electrons spiralling around magnetic field lines with discrete pitch angles is co
The problem of producing the hard X-ray burst at the onset of solar flares may be thought of in terms of the problem of producing the non-thermal electrons which emit the X-rays via bremsstrahlung. Electron acceleration to relativistic energies without similar ion acceleration is difficult to achiev