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K. France, P. D. Feldman, S. R. McCandliss, B-G Andersson, E. B. Burgh (JHU)
We report on new observations made by sounding rocket experiments and the Far Ultraviolet Spectroscopic Explorer to expand the observational basis for molecular hydrogen studies. This new data set allows us to explore models of ultraviolet fluorescence under a range of astrophysical conditions. The observational survey includes a variety of photodissociation regions, including the emission nebula IC 63, the star-forming region near the Orion Nebula, the emission/reflection nebula IC 405, and the pure reflection nebulae NGC 2023 and NGC 7023. We detect the fluorescent signature in the first three objects, and we use these data to develop a model of this emission that is consistent with observation. We do not detect hydrogen fluorescence as presently understood in the latter two objects, and explanations are discussed.
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Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.