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Microwave burst spectra and solar flare magnetic fields
Solar Physics, 1977Microwave burst spectra are compared with the position, within the active region, of their associated flares observed in Hα. The magnetic fields predicted by Takakura's burst model (1972) are found to be in reasonable agreement with the fields expected at the flare locations.
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Atomic physics calculations relevant to solar flare spectra
Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences, 1991Abstract Solar flare spectra in the ultraviolet and X-ray wavelength regions are rich in emission lines from highly ionized ions, formed at temperatures around 107 K. These lines can be used as valuable diagnostics for probing the physical conditions in solar flares.
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Microwave solar flare spectra of complex magnetic ambient
AIP Conference Proceedings, 2005The magnetic field lines were never so depicted as in the recent results about active regions on the sun from the EUV experiments on board of SOHO and TRACE satellites. The main result is a clear complexity of the, as called, magnetic arcs on top of the sunspots with arc second spatial resolution of the field lines connecting different magnetic ...
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High-resolution X-ray spectra of solar flares
Advances in Space Research, 2006Abstract I discuss high-resolution solar flare soft X-ray spectra and also comment on some recent results from extreme ultraviolet (EUV) spectroscopy. Spectra of solar flares at these wavelengths have been recorded since the late 1960s, beginning primarily with the NASA Orbiting Solar Observatory (OSO) series of spacecraft.
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On helium-like 1s2l?1snl? transitions in solar flare spectra
Solar Physics, 1974Expected wavelengths and intensities are computed for 1s2l−1snl′ transitions in helium-like ions of the abundant elements from oxygen to iron, under coronal conditions. Probable observations of some of these lines, in the spectra of solar flares, are discussed and attention is called to a possible reversal of singlet and triplet intensities as compared
S. O. Kastner, W. M. Neupert, M. Swartz
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Solar flare particle injection spectra and spectra of flux maxima at the point of observation
Advances in Space Research, 1981Abstract Numerical models of impulsive solar flare particle events usually assume the radial diffusion coefficient to be independent of energy per nucleon, T, although the observations indicate a T 0.5 dependence (constant mean free path). The assumption of a constant diffusion coefficient results in a preservation of a power law injection spectrum ...
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Solar Flare X-ray Spectra from the P78-1 Spacecraft
Solar Physics, 1983Results from the high resolution solar X-ray spectrometer experiments on the P78-1 spacecraft are discussed. These results concern physical quantities such as electron temperature and density, turbulence, mass motions, and state of ionization equilibrium, characteristic of the thermal soft X-ray emitting flare plasma, and the time behavior of these ...
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Observation of solar flare hard X-ray spectra using CdTe detectors
Advances in Space Research, 2004S Tsuneta
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