Nonthermal and Thermal Emissions in Solar Flares
نویسندگان
چکیده
منابع مشابه
Thermal and non-thermal energies of solar flares
The energy of the thermal flare plasma and the kinetic energy of the non-thermal electrons in 14 hard X-ray peaks from 9 medium-sized solar flares have been determined from RHESSI observations. The emissions have been carefully separated in the spectrum. The turnover or cutoff in the low-energy distribution of electrons has been studied by simulation and fitting, yielding a reliable lower limit...
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Two data sets of metastable states duration time: one obtained in a laboratory thermal convection experiment and another in the satellite’s Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI: 2002–2003 yy) observations, are compared in order to extract an information about a general (common) statistical mechanism in the onset of the metastable states. Simple probability distributions ...
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We investigate the origin of the increasing spectra observed at submillimeter wavelengths detected in the flare on 2 November 2003 starting at 17:17 UT. This flare, classified as an X8.3 and 2B event, was simultaneously detected by RHESSI and the Solar Submillimeter Telescope (SST) at 212 and 405 GHz. Comparison of the time profiles at various wavelengths shows that the submillimeter emission r...
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We have computed the Lyman continuum intensities for different flare circumstances, namely, the temperature rise in the chromosphere, the downward shift of the transition region, and the nonthermal effect of a precipitating beam of electrons. All the three factors can enhance the intensity by various amounts. The third effect additionally lowers the color temperature of the Lyman continuum. It ...
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1. Science Summary A large variety of astrophysical objects are sites of powerful particle acceleration and impulsive energy release. The Sun provides us with an excellent nearby opportunity to study the physical mechanisms that drive these processes. Rapid changes in the highly-stressed magnetic fields of solar flares lead to large-scale energy release of up to ~10 ergs per second. These explo...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1989
ISSN: 0252-9211
DOI: 10.1017/s0252921100154089