Gamma-ray and hard X-ray imaging of solar flares
نویسندگان
چکیده
منابع مشابه
Gamma-ray and Hard X-ray Imaging of Solar Flares
We discuss the scientific and technical aspects of high-resolution γ-ray and X-ray imaging of solar flares. The scientific necessity for imaging observations of solar flares and the implications of future observations for the study of solar flare electrons and ions are considered. Performance parameters for a future hard X-ray and γ-ray imager are then summarized. We briefly survey techniques f...
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We describe recent work on the development of a Compton scatter polarimeter for measuring the polarization of hard X-rays (100–300 keV) from astrophysical sources. Results from measurements with a laboratory prototype are summarized, along with comparisons to Monte Carlo simulations. We also present our latest design concept, which envisions a complete polarimeter module on the front end of a 5...
متن کاملKappa distribution and hard X - ray emission of solar flares
Aims. We investigate whether the so-called kappa distribution, often used to fit electron distributions detected in-situ in solar wind, can describe electrons producing the hard X-ray emission in solar flares. Methods. Using Ramaty High Energy Solar Spectroscopic imager (RHESSI) flare data we fit spatially and feature integrated spectra assuming kappa distribution for mean electron flux spectru...
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Ulysses was launched in October 1990, and its Solar X-ray/Cosmic Gamma-ray Burst Experiment (GRB) has provided more than 13 years of uninterrupted observations of solar X-ray flare activity. Due to the large variation of the relative solar latitude and longitude of the spacecraft orbit with respect to the Earth, the perspective of the GRB instrument often differed significantly from that of X-r...
متن کاملGamma-Ray Polarimetry of Two X-Class Solar Flares
We have performed the first polarimetry of solar flare emission at γ-ray energies (0.2–1MeV). These observations were performed with the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) for two large flares: the GOES X4.8-class solar flare of 2002 July 23, and the X17-class flare of 2003 October 28. We have marginal polarization detections in both flares, at levels of 21 ± 9% and -...
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ژورنال
عنوان ژورنال: Solar Physics
سال: 1988
ISSN: 0038-0938,1573-093X
DOI: 10.1007/bf00148596