Astronomy and Astrophysics – Astronomy
Scientific paper
May 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...188.4407l&link_type=abstract
American Astronomical Society, 188th AAS Meeting, #44.07; Bulletin of the American Astronomical Society, Vol. 28, p.892
Astronomy and Astrophysics
Astronomy
1
Scientific paper
We construct the first detailed three-dimensional models of the Local Interstellar Cloud (LIC) and the total amount of warm gas in the local interstellar medium (LISM) within 10 parsecs of the Sun. These models are based on the amount of neutral hydrogen gas deduced (a) from measurements of the deuterium column density toward nearby late-type stars, obtained from the analysis of Hubble Space Telescope spectra, and (b) from the spectra of hot white dwarf stars measured with the Extreme Ultraviolet Explorer satellite. The two methods give consistent results. We find that the LIC is flattened in the Galactic plane and that the hydrogen column densities are very similar for stars located in the sky within 12(deg) , indicating the angular scale of the gas close to the Sun. The direction of minimum hydrogen absorption through the LISM is near Galactic longitude l=262(deg) and latitude b=+22(deg) . This work is supported by NASA Grant S-56460-D.
Linsky Jeffrey L.
Piskunov Nicolai
Wood Brian E.
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