Abstract
Recent observational and theoretical results are reviewed that pertain to the presence and characteristics of stellar coronae and winds in latetype stars. It is found that stars - principally dwarfs - exist with “hot” coronae similar to the Sun with thermally driven winds. For stars at the lowest effective temperatures, and gravities characteristic of supergiant and giant stars, high temperature (}105K) atmospheres are absent (or if present are substantially weaker than in the dwarf stars), and massive winds are present. There also exist “hybrid” examples - lumi nous stars possessing both a “hot” corona and a supersonic stellar wind. Constraints for theoretical models are discussed.
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Dupree, A.K., Hartmann, L. (1980). Stellar-winds and coronas in cool stars. In: Gray, D.F., Linsky, J.L. (eds) Stellar Turbulence. Lecture Notes in Physics, vol 114. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-09737-6_37
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DOI: https://doi.org/10.1007/3-540-09737-6_37
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