Mathematics – Logic
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.257...32v&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 257, no. 1, July 1, 1992, p. 32-46. Research supported
Mathematics
Logic
38
Calibrating, Equations Of State, Helioseismology, Solar Interior, Stellar Envelopes, Hydrodynamic Equations, P Waves, Physical Properties, Solar Oscillations, Stellar Models, Stellar Structure
Scientific paper
The solar p-mode frequencies represent a unique source of observational information about the physical properties of the solar interior, including the equation of state (EPS). The influence of possible uncertainties in the EOS on the frequencies is small, and mixed with a variety of possible uncertainties in solar structure and physics of the oscillations. This paper describes a technique aimed at separating the effects of the EOS in the information contained in the intermediate-degree data by extracting some functions, or 'tracers', sensitive to the EOS, and insensitive, as far as possible, to the irrelevant effects. The possibilities of the technology are examined by testing a variety of solar envelope models computed with four versions of EOS, in increasing degree of sophistication: (1) EOS of partially ionized ideal gas; (2) EOS with Debye-Hueckel electrostatic corrections; (3) EOS with short-range corrections to the Debye-Hueckel term, and (4) the most recent (Mihalas, et al.) MHD equation of state. By comparing the models with observational data, the effects of the electrostatic corrections are discussed, and first tentative conclusions on two more elaborate versions of the EOS are drawn.
Baturin Vladimir A.
Pamiatnykh A. A.
Vorontsov Sergei V.
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