Interstellar gas towards CTB 37A and the TeV gamma-ray source HESS J1714−385
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Open access
Authors
Maxted, N.
Rowell, G.
Dawson, B.
Burton, M.
Fukui, Y.
Walsh, Andrew
Kawamura, A.
Horachi, H.
Sano, H.
Yoshiike, S.
Fukuda, T.
Date
2013Type
Journal Article
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Maxted, Nigel I. and Rowell, Gavin P. and Dawson, Bruce R. and Burton, Michael G. and Fukui, Yasuo and Walsh, Andrew and Kawamura, Akiko et al. 2013. Interstellar gas towards CTB 37A and the TeV gamma-ray source HESS J1714−385. Monthly Notices of the Royal Astronomical Society. 434 (3): pp. 2188-2201.
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Monthly Notices of the Royal Astronomical Society
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This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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Abstract
Observations of dense molecular gas towards the supernova remnants CTB 37A (G348.5+0.1) and G348.5−0.0 were carried out using the Mopra and Nanten2 radio telescopes. We present CO(2–1) and CS(1–0) emission maps of a region encompassing the CTB 37A TeV gamma-ray emission, HESS J1714−385, revealing regions of dense gas within associated molecular clouds. Some gas displays good overlap with gamma-ray emission, consistent with hadronic gamma-ray emission scenarios. Masses of gas towards the HESS J1714−385 TeV gamma-ray emission region were estimated, and were of the order of 103–104 M. In the case of a purely hadronic origin for the gamma-ray emission, the cosmic ray flux enhancement is ~80–1100 times the local solar value. This enhancement factor and other considerations allow a discussion of the age of CTB 37A, which is consistent with ~104 yr.
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