FUSE Observations of Interstellar Molecular Hydrogen in the Small Magellanic Cloud

Details FUSE Observations of Interstellar Molecular Hydrogen in the Small Magellanic Cloud FUSE Observations of Interstellar Molecular Hydrogen in the Small Magellanic Cloud

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.0610s&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #06.10; Bulletin of the American Astronomical Society, Vol. 31, p.1375

Astronomy and Astrophysics

Astronomy

Scientific paper

We present an initial study of molecular hydrogen and atomic species in the ISM of the Small Magellanic Cloud and the Milky Way on the sightline toward two O stars in the SMC. The two stars, HD 5980 and Sk 80, are separated by 72 arcsec and are part of the dense star cluster and giant H II region NGC 346. FUSE spectra reveal numerous interstellar absorption lines from the H2 Lyman and Werner bands shortward of 1120 Angstroms. H2 column densities in low rotational states (J=0,1) provide kinetic temperatures of diffuse interstellar gas; higher rotaional states probe the UV radiation field. The low metallicity of the SMC is a very different environment from the Milky Way for molecular hydrogen formation. This work is supported by NASA contract NAS5-32985.

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