Observed Ly-alpha Absorption Suggests Barely Subsonic Heliospheric Inflow

Details Observed Ly-alpha Absorption Suggests Barely Subsonic Heliospheric Inflow Observed Ly-alpha Absorption Suggests Barely Subsonic Heliospheric Inflow

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...189.1805g&link_type=abstract

American Astronomical Society, 189th AAS Meeting, #18.05; Bulletin of the American Astronomical Society, Vol. 28, p.1298

Astronomy and Astrophysics

Astronomy

Scientific paper

Detection of heliospheric absorption in GHRS spectra of nearby Ly-alpha sources allows for strong constraints on heliospheric models. We use such data toward alpha-Cen to confront sophisticated models that include the possibility of a subsonic heliospheric inflow. Our preliminary conclusion is that the Ly-alpha data most sensitively constrain the inflow Mach number, and that a Mach number near 0.9 provides the best fit, although a detailed parameter study is now needed.

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