Iron and calcium abundances in solar flares from the multitemperature analysis of X-ray spectra

Title:

Iron and calcium abundances in solar flares from the multitemperature analysis of X-ray spectra

Creator:

Fludra, A., Bentley, R. D., Culhane, J. L., Lemen, J. R., and Sylvester, J.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:7fe882b6-d730-427c-a229-230e6d4cfcfc
uuid:7fe882b6-d730-427c-a229-230e6d4cfcfc

Subject:

emission measure, iron in solar flares, and calcium in solar flares

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

A generalized method of calculating the distribution of the emission measure with temperature (DEM) for optically thin plasma has been developed. The method simultaneously uses line flux ratios in addition to line fluxes. When a ratio of lines from the same element is used, the resulting DEM is independent of this elemenťs abundance. The method has been applied to derive the absolute abundances of iron in solar flares from X-ray spectra recorded by the Bent Crystal Spectrometer on SMM. The iron abundances háve been found to vary between flares. The calcium abundances have also been calculated using the same method and are found to be in close agreement with the values derived from the line to continuum technique. The variation of iron and calcium abundances is compared. A correction to ionization balance for iron is proposed.

Language:

Czech

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Coverage:

91-91

Source:

Publications of the Astronomical Institute of the Academy of Sciences of the Czech Republic | 1998 Volume:87-88 | Number:88

Harvested from:

CDK

Metadata only:

false