Molecular Hydrogen in the Milky Way Halo

Details Molecular Hydrogen in the Milky Way Halo Molecular Hydrogen in the Milky Way Halo

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...199.1109r&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #11.09; Bulletin of the American Astronomical Society, Vol. 33, p.1325

Astronomy and Astrophysics

Astronomy

Scientific paper

Far Ultraviolet Spectroscopic Explorer data is used to investigate the molecular hydrogen (H2) content of Intermediate- and High-Velocity Clouds (IVCs and HVCs, respectively) in the Milky Way halo. H2 in IVC gas is detected in more than 25 cases (including the IV Arch, the LLIV Arch, and Complex gp), suggesting the presence of a widespread, diffuse molecular gas phase in the lower Galactic halo. H2 is also detected along two sight lines in the Magellanic Stream, but not in HVC Complex C. We discuss our findings in regard to metal and dust abundances in Galactic halo clouds, and the UV radiation field above the Galactic plane.

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