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Empirical Constraints on the Outer Atmospheres of Late-Type Giant Stars with IUE

Judge, P. G.

Useful constraints on the outer atmospheric structure of late-type giant stars can be obtained using emission lines observed with the IUE satellite if all important processes in the atomic excitation calculations are included. Carpenter et al. (1985) did not include such effects, and therefore overestimated the geometric extent of the emission reg…