Molecular Hydrogen Fluorescence in the Eridanus Superbubble

Details Molecular Hydrogen Fluorescence in the Eridanus Superbubble Molecular Hydrogen Fluorescence in the Eridanus Superbubble

2006-01-26

arxiv.org/abs/astro-ph/0601590v1

Astrophys.J. 644 (2006) L185-L188

Astronomy and Astrophysics

Astrophysics

10 pages, 3 figures, apjl accepted

Scientific paper

10.1086/505203

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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