Abundance variations in solar active regions

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Abundance variations in solar active regions

Abundance variations in solar active regions

Strong, K. T. / Lemen, J. R. / Linford, G. A.

The diversity in the published values of coronal abundances is unsettling, especially as the range of results seems to be beyond the quoted uncertainties. Measurements of the relative abundance of iron and neon derived from soft X-ray spectra of active regions are presented. From a data base of over 200 spectra taken by the Solar Maximum Mission Flat Crystal Spectrometer, it is found that the relative abundance can vary by as much as a factor of about 7 and can change on timescales of less than 1 h.

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Title :

Abundance variations in solar active regions

Contributors:

Strong, K. T. (author) / Lemen, J. R. (author) / Linford, G. A. (author)

Published in:

Advances in Space Research ; 11 , 1 19

Publication date :

1991-01-01

ISSN :

Type of media :

Miscellaneous

Type of material :

No indication

Language :

English

Keywords :

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