Molecular Hydrogen Fluorescence in the Eridanus Superbubble

Abstract

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.

10 pages, 3 figures, apjl accepted

References in corpus (6)

• A Full-Sky H-alpha Template for Microwave Foreground Prediction
• The SPEAR Instrument and On-Orbit Performance
• The Spectroscopy of Plasma Evolution from Astrophysical Radiation Mission
• FUSE Observations of Molecular Hydrogen in Translucent Interstellar Clouds: The Line of Sight Toward HD 73882
• Far-UV Observations of a Thermal Interface in the Orion-Eridanus Superbubble
• Deep Halpha imagery of the Eridanus shells

Cited by in corpus (11)

• A catalogue of cataclysmic variables from 20 years of the Sloan Digital Sky Survey with new classifications, periods, trends and oddities
• The Spectroscopy of Plasma Evolution from Astrophysical Radiation Mission
• Observation of the Far-ultraviolet Continuum Background with SPEAR/FIMS
• The Diffuse Galactic Far-Ultraviolet Sky
• Far-ultraviolet fluorescent molecular hydrogen emission map of the Milky Way Galaxy
• Far-UV Observations of a Thermal Interface in the Orion-Eridanus Superbubble
• Kompaneets Model Fitting of the Orion-Eridanus Superbubble II: Thinking Outside of Barnard's Loop
• The Origin of Ionized Filaments Within the Orion-Eridanus Superbubble
• Kompaneets Model Fitting of the Orion-Eridanus Superbubble
• A Tentative Detection of Molecular Hydrogen (H${}_2$) Emission Lines at Cosmic Dawn
• Space Missions for Astronomy and Astrophysics in Korea: Past, Present, and Future