Geometric line elevation in solar limb faculae

Details Geometric line elevation in solar limb faculae Geometric line elevation in solar limb faculae

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...248..227s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 248, no. 1, Aug. 1991, p. 227-231.

Astronomy and Astrophysics

Astrophysics

6

Faculae, Line Spectra, Solar Limb, Solar Spectra, Displacement, Photosphere, Spectral Line Width

Scientific paper

Spectra of markedly visible white light faculae near the solar limb are used to determine the geometric displacement, Delta-h, of line cores with respect to their adjacent continuum. The observed Delta-h are plotted as a function of the excitation potential and, respectively, equivalent width of the different lines. Comparison with calculated Delta-h from a photospheric LTE model shows that the observed facula values significantly exceed the photospheric ones.

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