Global Far-Ultraviolet Image of the Eridanus Superbubble Observed by FIMS/SPEAR

We present the first far-ultraviolet (FUV; 1350-1750 AA) diffuse emission map of the Eridanus superbubble, obtained using the FIMS/SPEAR instrument. The features seen in the FUV image closely resemble those seen in the H alpha map, including two prominent arcs identified earlier in H alpha . While i...

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Bibliographic Details
Published in:The Astrophysical journal 2008-05, Vol.678 (1), p.L29-L33
Main Authors: Ryu, K, Min, K. W, Seon, K.-I, Nonesa, J, Edelstein, J, Korpela, E, Sankrit, R, Han, W, Park, J.-H, Park, Y. S
Format: Article
Language:English
Subjects:
Astronomy
Earth, ocean, space
Exact sciences and technology
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Summary:We present the first far-ultraviolet (FUV; 1350-1750 AA) diffuse emission map of the Eridanus superbubble, obtained using the FIMS/SPEAR instrument. The features seen in the FUV image closely resemble those seen in the H alpha map, including two prominent arcs identified earlier in H alpha . While it has been argued that the FUV emission in this region is mostly due to the scattering of star light by dust, a close spectral examination reveals that one of the arcs is abundant in molecules and dust while the other is mainly composed of atomic species. Upon comparison to emission maps in other bands (X-ray, IR, optical H alpha ), we propose the most plausible geometrical structure of this region.
ISSN:1538-4357
0004-637X
1538-4357
DOI:10.1086/588282