โ Scribed by T. Takakura; K. Ohki; S. Tsuneta; N. Nitta
No coin nor oath required. For personal study only.
A morphological study is made for the hard X-ray images (25-50 keV) of nine impulsive bursts observed by Hinotori. Most of them revealed single sources, either extended or compact, during the whole duration of the bursts. The sources of all of four spike bursts in the present sample are compact. After the main phase of the impulsive bursts, generally the source size becomes smaller accompanying a shift of position.
The X-ray source size is much greater than that of the He kernel in two events out of three. Four possible explanations for the X-ray source to be single are suggested. One of these is the strong electric field along the magnetic field as demonstrated to be produced at the decay of force-free current.
๐ SIMILAR VOLUMES
We survey here the observational results on five gradual and four impulsive type events from the hard X-ray imaging (SXT) and spectrometer (HXM) instruments on the Hinotori satellite. A set of differences are clearly recognized between the gradual and impulsive type bursts. These are: (i) Hard X-ray
Observationally solar X bursts fall into three different categories: soft X bursts (E ,< I 0 keV), deka-keV bursts (10-150 keV), and very hard X bursts or deci-MeV bursts (200-1000 keV). The first kind is quasi-thermal, the last kind is non-thermal. The real existence of the third kind of burst look