Dense Gas Towards the RXJ1713.7-3946 Supernova Remnant
| Autor: | Maxted, Nigel I., Rowell, Gavin P., Dawson, Bruce R., Burton, Michael G., Fukui, Yasuo, Lazendic, Jasmina, Kawamura, Akiko, Horachi, Hirotaka, Sano, Hidetoshi, Walsh, Andrew J., Yoshiike, Satoshi, Fukuda, Tatsuya |
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| Rok vydání: | 2013 |
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| Druh dokumentu: | Working Paper |
| DOI: | 10.1017/pasa.2013.35 |
| Popis: | We present results from a Mopra 7mm-wavelength survey that targeted the dense gas-tracing CS(1-0) transition towards the young gamma-ray-bright supernova remnant, RXJ1713.7-3946 (SNR G347.3-0.5). In a hadronic gamma-ray emission scenario, where cosmic ray protons interact with gas to produce the observed gamma-ray emission, the mass of potential cosmic ray target material is an important factor. We summarise newly-discovered dense gas components, towards Cores G and L, and Clumps N1, N2, N3 and T1, which have masses of 1-10^4 solar masses. We argue that these components are not likely to contribute significantly to gamma-ray emission in a hadronic gamma-ray emission scenario. This would be the case if RXJ1713.7-3946 were at either the currently favoured distance of ~1kpc or an alternate distance (as suggested in some previous studies) of ~6kpc. This survey also targeted the shock-tracing SiO molecule. Although no SiO emission corresponding to the RXJ1713.7-3946 shock was observed, vibrationally-excited SiO(1-0) maser emission was discovered towards what may be an evolved star. Observations taken one year apart confirmed a transient nature, since the intensity, line-width and central velocity of SiO(J=1-0,v=1,2) emission varied significantly. Comment: 19 pages, 11 figures, accepted for publication in PASA |
| Databáze: | arXiv |
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