ASTRA Proc., 1, 43-49, 2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
25 Aug 2014
Lyman-α observations of astrospheres
J. L. Linsky1 and B. E. Wood2 1JILA, University of Colorado and NIST, Boulder, CO, USA
2US Naval Research Laboratory, Washington, D.C., USA
Abstract. Charge-exchange reactions between outflowing stellar wind protons and interstellar neutral hydrogen atoms entering a stellar astrosphere produce a region of piled-up-decelerated neutral hydrogen called the hydrogen wall. Absorption by this gas, which is observed in stellar Lyman-α emission lines, provides the only viable technique at this time for measuring the mass-loss rates of F–M dwarf stars. We describe this technique, present an alternative way for understanding the relation of mass-loss rate with X-ray emission, and identify several critical issues.

Citation: Linsky, J. L. and Wood, B. E.: Lyman-α observations of astrospheres, ASTRA Proc., 1, 43-49,, 2014.
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