Far-ultraviolet study of the local supershell GSH 006–15+7

Journal Article · Wed Jul 01 04:00:00 EDT 2015 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/807/1/68· OSTI ID:22882959

Jo, Young-Soo; Min, Kyoung-Wook ^[1]; Seon, Kwang-Il ^[2]

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1. Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, Korea 305-701 (Korea, Republic of)
2. Korea Astronomy and Space Science Institute (KASI), 776 Daedeokdae-ro, Yuseong-gu, Daejeon, Korea 305-348 (Korea, Republic of)

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 H{sub 2} column density of N(H{sub 2}) = 10{sup 18.0−20.0} cm{sup −2} with a rather high total hydrogen density of n{sub H} ∼ 30 cm{sup −3}.

• OSTI ID: 22882959
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 807; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United Kingdom
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
COMPUTERIZED SIMULATION
COSMIC DUST
DISSOCIATION
DISTANCE
FAR ULTRAVIOLET RADIATION
FLUORESCENCE
HYDROGEN
MONTE CARLO METHOD
PHOTOLYSIS
PHOTONS
SPECTRA
VELOCITY