Physics
Scientific paper
Jul 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..382...66d&link_type=abstract
Proceedings of the eigth international solar wind conference: Solar wind eight. AIP Conference Proceedings, Volume 382, pp. 66-
Physics
Mass Loss And Stellar Winds, Giant And Subgiant Stars
Scientific paper
Spectral observations of cool stars enable the study of the presence and character of winds and the mass loss process in objects with effective temperatures, gravities, and atmospheric compositions which differ from that of the Sun. A wealth of recent spectroscopic measurements from the Hubble Space Telescope, and the Extreme Ultraviolet Explorer satellite complement high resolution ground-based spectra in the optical and infrared spectral regions. Such observations when combined with realistic semi-empirical atmospheric modeling allow us to estimate the physical conditions in the atmospheres and winds of many classes of cool stars. In low gravity stars, evidence is found for relatively fast (~200 km s-1), warm winds with rapid acceleration occurring in the chromosphere. In some cases, outflows commensurate with stellar escape velocities are present.
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