Lyman-alpha observations of astrospheres
Solar and Stellar Astrophysics
2014-08-27 v1
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-alpha 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.
Keywords
Cite
@article{arxiv.1408.5934,
title = {Lyman-alpha observations of astrospheres},
author = {Jeffrey L. Linsky and Brian E. Wood},
journal= {arXiv preprint arXiv:1408.5934},
year = {2014}
}
Comments
10 pages and 4 figures. Paper presented at the conference "Wind Bubbles, Astrospheres and the Helisphere, Environments and Cosmic Rays" held in Bochum Germany November 4, 2013