H and K lines in the sunspot umbra - A source function and Doppler width

Details H and K lines in the sunspot umbra - A source function and Doppler width H and K lines in the sunspot umbra - A source function and Doppler width

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975soph...43..293t&link_type=abstract

Solar Physics, vol. 43, Aug. 1975, p. 293-309.

Physics

5

Doppler Effect, H Lines, K Lines, Solar Spectra, Spectral Line Width, Sunspots, Umbras, Absorptivity, Calcium, Chromosphere, Continuous Spectra, Fine Structure

Scientific paper

An inversion of line profiles H and K Ca II in the umbra of two sunspots is performed. By means of a numerical experiment, a tentative study of possible application of the method of intercomparison of lines in the multiplet (Goldberg's method) is made in cases when the condition of source function equality in multiplet is not fulfilled. It is found that the source functions of H and K lines in the sunspot umbra vary monotonically. Their ratio in the layers for which measured values of the Doppler width are available differs from unity. In the region of the lower chromosphere under consideration, the Doppler width is decreasing with height.

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