Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...122....1a&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 122, no. 1-2, June 1983, p. 1-8.
Astronomy and Astrophysics
Astrophysics
38
Solar Magnetic Field, Stellar Spectrophotometry, Sunspots, Umbras, Solar Temperature, Spectrum Analysis, Stellar Models
Scientific paper
An empirical two-component model of the solar sunspot core based on the results of a two-dimensional photometrical analysis of quasi-statistical nature is presented. Spectrophotometrical line profile measurements of a highly selected observation are also used. The core of a sunspot is considered to be composed of a more or less homogeneous dark and cold background occupying 95 percent of the area of the core, with many tiny, very bright umbral dots embedded inside. The average radiative flux corresponding to the dots amounts to 37 pecent of the total flux of the core at 6000 A. With a calculated distribution of temperature and pressure of the proposed hydrostatic two-component model, it is demonstrated that the essential results given by the most recent homogeneous models can be easily retrieved when the hot and cold components of the present model are adequately mixed.
Adjabshirzadeh A.
Koutchmy Serge
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