The chromospheres and coronae of five G-K main-sequence stars

摘要: Previous data and high low dispersion IUE observations of Chi 1 Ori, Alpha Cen A, Xi Boo B, Epsilon Eri are used to model the atmospheres these stars from chromosphere corona. The energy lost by radiation transferred thermal conduction is investigated establish heating requirements, results similar those found for solar atmosphere found. observed emission measurement distribution below 100,000 K can be described a in which Alfven wave input, through nonthermal line broadening, balanced losses. Comparison coronal, transition region, chromospheric pressures shows scaling relations compatible with previous flux correlations.