Reference models of sunspot chromospheres

Details Reference models of sunspot chromospheres Reference models of sunspot chromospheres

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.118..173y&link_type=abstract

(IAU, Asian-Pacific Regional Meeting, 3rd, Kyoto, Japan, Sept. 30-Oct. 5, 1984) Astrophysics and Space Science (ISSN 0004-640X),

Astronomy and Astrophysics

Astrophysics

Chromosphere, Line Spectra, Solar Spectra, Sunspots, Umbras, Electron Density (Concentration), High Resolution, Infrared Spectra, Magnetoacoustics, Temperature Gradients, Ultraviolet Spectra

Scientific paper

Space and ground determinations of the density-temperature structure of the umbral chromosphere are presently combined with existing Ca II H, K, and IR triplet spectra in order to define relatively high density 'gradient' models of the sunspot chromosphere. It is noted that the Ca II H, K and IR triplet line core intensity profiles can be predicted with accuracy, yielding both the narrowness of the emission features and K3/H3 intensity ratios consistent with observations. Thus, the triplet lines, transition region electron densities, and umbral oscillation periods (all observables) may be combined to establish well defined chromospheric models.

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