FAR-ULTRAVIOLET STUDY OF THE LOCAL SUPERSHELL GSH 006-15+7

ABSTRACT We have analyzed the archival data of far-UV (FUV) observations for the region of GSH 006-15+7, a large shell-like structure discovered by Moss et al. from the H i velocity maps. FUV emission is seen to be enhanced in the lower supershell region. The FUV emission is considered to come mainl...

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Bibliographic Details
Published in:The Astrophysical journal 2015-07, Vol.807 (1), p.1-7
Main Authors: Jo, Young-Soo, Min, Kyoung-Wook, Seon, Kwang-Il
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Computer simulation
COMPUTERIZED SIMULATION
COSMIC DUST
Density
DISSOCIATION
DISTANCE
dust, extinction
Emission
FAR ULTRAVIOLET RADIATION
FLUORESCENCE
HYDROGEN
ISM: bubbles
ISM: individual objects (GSH 006-15+7)
ISM: structure
Latitude
MONTE CARLO METHOD
Moss
PHOTOLYSIS
PHOTONS
SPECTRA
ultraviolet: ISM
VELOCITY
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Summary:ABSTRACT We have analyzed the archival data of far-UV (FUV) observations for the region of GSH 006-15+7, a large shell-like structure discovered by Moss et al. from the H i velocity maps. FUV emission is seen to be enhanced in the lower supershell region. The FUV emission is considered to come mainly from the scattering of interstellar photons by dust grains. A corresponding Monte Carlo simulation indicates that the distance to the supershell is 1300 800 pc, which is similar to the previous estimation of 1500 500 pc based on kinematic considerations. The spectrum at lower Galactic latitudes of the supershell exhibits molecular hydrogen fluorescence lines; a simulation model for this candidate photodissociation region yields an H2 column density of N(H2) = cm−2 with a rather high total hydrogen density of nH ∼ 30 cm−3.
ISSN:0004-637X
1538-4357
1538-4357
DOI:10.1088/0004-637X/807/1/68