Atmospheres and Winds in Cool Stars

Details Atmospheres and Winds in Cool Stars Atmospheres and Winds in Cool Stars

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007uasb.conf...35p&link_type=abstract

UV Astronomy: Stars from Birth to Death. Proceedings of the Joint Discussion n.4 during the IAU general Assembly of 2006. Ana I.

Astronomy and Astrophysics

Astronomy

Uv Astronomy, Late-Type Stars, Chromosphere, Transition Region, Corona, Winds, Magnetic Activity

Scientific paper

Cool star outer atmospheres represent an important laboratory in which solarlike magnetic activity phenomena can be studied under a wide variety of conditions, allowing us to gain insights into the fundamental processes involved. The UV range is especially useful for such studies because it contains powerful diagnostics extending from warm (10,000K) chromospheres out to hot (1 - 10MK) coronae. Also very weak coronal winds from cool stars have been identified and characterized thanks to high resolution UV spectra. Here I give a review on UV spectroscopy main achievements for cool star chromospheres, transition regions, coronae and coronal winds. I also outline the requirements for future experiments able to allow progresses in this field.

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