Interstellar gas towards CTB 37A and the TeV gamma-ray source HESS J1714-385
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.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- September 2013
- DOI:
- 10.1093/mnras/stt1159
- arXiv:
- arXiv:1307.4484
- Bibcode:
- 2013MNRAS.434.2188M
- Keywords:
-
- molecular data;
- supernovae: individual: CTB 37A;
- ISM: clouds;
- cosmic rays;
- gamma-rays: ISM;
- Astrophysics - High Energy Astrophysical Phenomena;
- Astrophysics - Galaxy Astrophysics
- E-Print:
- 18 pages, 13 figures