Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984azh....61..968b&link_type=abstract
(Astronomicheskii Zhurnal, vol. 61, Sept.-Oct. 1984, p. 968-975) Soviet Astronomy (ISSN 0038-5301), vol. 28, Sept.-Oct. 1984, p.
Astronomy and Astrophysics
Astronomy
Dwarf Stars, Solar Spectra, Spectrum Analysis, Stellar Atmospheres, Stellar Spectra, Sunspots, Continuous Spectra, Energy Transfer, Fraunhofer Lines, Spectral Line Width, Stellar Structure
Scientific paper
A comparative analysis of the spectra of dwarf stars and a sunspot is made. It is shown that the spectral class of a sunspot depends on the index used: A sunspot has the class M0 based on the continuous spectrum, about K5 based on weak lines, and G8-K0 based on strong lines. From this it follows that the atmosphere of a sunspot cannot be likened to the average standard atmosphere of a star of any spectral class. This may be connected with the specific role of magnetic fields, the inhomogeneous structure of the atmospehre, horizontal energy transfer in a sunspot, and the force of gravity, which is different from that of a star with the same effective temperature.
Badalyan Olga G.
Obridko Vladimir N.
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