Physics
Scientific paper
Aug 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000soph..195..269g&link_type=abstract
Solar Physics, v. 195, Issue 2, p. 269-279 (2000).
Physics
2
Scientific paper
Chemical composition anomalies of the corona and solar wind (FIP effect) have their origins in the chromosphere. We study the influence of the possible stratification of abundances in the chromosphere on the shape of corresponding strong Fraunhofer line profiles. A rough estimate is made of this influence for some variants of the variation in elemental abundance a_el(m) (m being the column mass). Calculations are made for the K and 8542Å Caii lines in two semi-empirical models of the chromosphere above sunspot umbra. In practice it is difficult to realize a direct search of the FIP effect in the chromosphere for lack of self-consistent theoretical models of the chromosphere required to match observations to them. An attempt is therefore proposed to find indirect signatures of the effect using a statistically significant sample of spectra for different objects, say, sunspots with a different magnetic structure and a different age.
Grigoryeva S. A.
Ozhogina O. A.
Teplitskaya R. B.
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