Variation in observed coronal calcium abundance of X-ray flare plasmas

Details Variation in observed coronal calcium abundance of X-ray flare plasmas Variation in observed coronal calcium abundance of X-ray flare plasmas

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984natur.310..665s&link_type=abstract

Nature (ISSN 0028-0836), vol. 310, Aug. 23, 1984, p. 665, 666. Research supported by the Science and Engineering Research Counci

Computer Science

66

Abundance, Solar Corona, Solar Flares, Solar X-Rays, X Ray Spectra, Calcium, Plasma Composition, Solar Spectra, Stellar Composition

Scientific paper

Variations in chemical composition during solar flares have been inferred from elemental abundance changes in cosmic ray fluxes, but have so far not been detected spectroscopically. The first spectroscopic evidence for the variation of the coronal calcium abundance in high-temperature solar flare plasmas is presented. The analyzed data consist of the high-resolution X-ray flare spectra observed with the Bent Crystal Spectrometer on board the Solar Maximum Mission satellite and described in detail by Acton et al. (1980). The observed abundance variation has important consequences for the analysis and interpretation of XUV and X-ray spectra.

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