Physics
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993soph..145...45c&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 145, no. 1, p. 45-63.
Physics
8
Conductive Heat Transfer, Coronal Loops, Stellar Coronas, Stellar Winds, Dwarf Stars, Emission Spectra, Giant Stars, Main Sequence Stars, Mean Free Path, Plasma Pressure, Plasma Temperature
Scientific paper
Stellar coronal loops were modeled in static conditions for a wide range of loop length, plasma pressure at the base of the loop, and stellar surface gravity in order to describe physical conditions that can occur in coronae of stars ranging from low-mass dwarfs to giants as well as on a significant fraction of the main-sequence stars. The characteristics of all loop models studied are reported, and examples are presented to illustrate how the temperature and density stratification can be drastically altered by the different conductivity regimes. It is found that, for fixed loop length and stellar gravity, a minimum of loop-top plasma temperature occurs, corresponding to the highest value of base plasma pressure for which the limited free-streaming conduction occurs. This value of temperature satisfies the appropriate scale of 10 exp -9 L g, in cgs units.
Ciaravella Angela
Peres Giovanni
Serio Salvatore
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