Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975stin...7722038a&link_type=abstract
Final Report National Bureau of Standards, Boulder, CO. Astrophysics Div.
Astronomy and Astrophysics
Astrophysics
Calcium, Line Spectra, Magnesium, Solar Spectra, Chromosphere, Mathematical Models, Stellar Structure, Ultraviolet Radiation
Scientific paper
The Mg II h and k resonance line data and profiles of the Ca II K line are compared with synthetic profiles computed using a partial redistribution formalism and several single-component solar upper photosphere and lower chromosphere models. It is found that second models predict systematically lower intensities in the h, k, and K inner wings than are observed, but that models with a somewhat larger minimum temperature (T(min) about 4450 K) can reproduce the measured inner wing intensities and limb darkening of these resonance lines. A 'hot' T(min) solar model, which is reasonably consistent with the empirical emission cores and wing intensities of the Ca II and Mg II resonance lines is proposed to serve as an alternative to the class of models, such as the HSRA and VAL, based on continuum observations.
Ayres Thomas R.
Linsky Jeffrey L.
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