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Session 45 - Interstellar Medium I.
Display session, Tuesday, January 16
North Banquet Hall, Convention Center

[45.16] ORFEUS Observations of Interstellar Molecular Hydrogen

M. Hurwitz, S. Bowyer (CEA/UCB), T. Sasseen (SSL/UCB)

We present high resolution (\lambda/3300) far-ultraviolet spectra of \approx20 early-type stars observed with the Berkeley spectrometer during the ORFEUS-I mission in September of 1993. Most of our targets are significantly more distant than those studied with Copernicus; the majority show strongly detected features of Lyman and Werner band absorption from H_2. We present H_2 column densities and excitation temperatures, and explore correlations with other tracers of molecular gas such as EB-V and, at high latitudes, the intensity of the diffuse background at 100 microns. This work is supported by NASA grant NAG5-3019.

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