Lyman-α observations of astrospheres

Linsky, J. L.; Wood, B. E.

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.

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Linsky, J. L. / Wood, B. E.: Lyman-α observations of astrospheres. 2014. Copernicus Publications.

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