Molecular Hydrogen Fluorescence in the Eridanus Superbubble

K. Ryu , K. W. Min , J. W. Park , D. H. Lee , W. Han , U. W. Nam , J. H. Park , J. Edelstein

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E. J. Korpela K. Nishikida E. F. van Dishoeck

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classification 🌌 astro-ph

keywords emissionfluorescencemoleculareridanushydrogenlambdaregionshowed

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The first FUV (lambda lambda 1350-1750 A) spectral imaging observations of the Eridanus superbubble, obtained with the SPEAR/FIMS mission, have revealed distinct fluorescent emission from molecular hydrogen. In this study, the observed emission features were compared with those from a photo-dissociation region model with assumed illuminating stellar fields. The result showed rather high line ratios of I_{1580}/I_{1610}, which may imply the existence of high-temperature molecular clouds in the region. The H_2 fluorescence intensity showed a proportional correlation with H-alpha emission, indicating that the fluorescence and the recombination emission have similar physical origins.

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Molecular Hydrogen Fluorescence in the Eridanus Superbubble

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