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arXiv 1310.7017astro-ph.HE
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朝向RXJ1713 .7-3946超新星遗迹的稠密气体

Dense Gas Towards the RXJ1713.7-3946 Supernova Remnant

Nigel I. Maxted, Gavin P. Rowell, Bruce R. Dawson, Michael G. Burton, Yasuo Fukui, Jasmina Lazendic, Akiko Kawamura, Hirotaka Horachi, Hidetoshi Sano, Andrew J.… 展开作者

Nigel I. Maxted, Gavin P. Rowell, Bruce R. Dawson, Michael G. Burton, Yasuo Fukui, Jasmina Lazendic, Akiko Kawamura, Hirotaka Horachi, Hidetoshi Sano, Andrew J. Walsh, Satoshi Yoshiike, Tatsuya Fukuda

摘要:

我们提出了来自Mopra 7毫米波长调查的结果,该调查针对致密气体示踪CS(1-0)过渡到年轻的伽马射线明亮的超新星遗迹RXJ1713.7-3946(SNR G347.3-0.5)。在强子伽马射线发射场景中,宇宙射线质子与气体相互作用产生观测到的伽马射线发射,潜在宇宙射线靶材料的质量是一个重要因素。我们总结了新发现的致密气体成分,包括核心G和L,以及质量为1-10^4太阳质量的团块N1,N2,N3和T1。我们认为,这些组件是不太可能作出重大贡献的伽马射线发射的强子伽马射线发射的情况。如果RXJ1713.7-3946位于目前最受欢迎的距离~ 1 kpc或替代距离(如以前的一些研究所建议的)~ 6 kpc,就会出现这种情况。这项调查还针对冲击跟踪SiO分子。虽然没有观测到与RXJ1713.7-3946激波对应的SiO辐射,但在可能是演化恒星的方向上发现了振动激发的SiO(1-0)脉泽辐射。间隔一年的观测证实了SiO(J=1-0,v= 1,2)发射的强度、线宽和中心速度变化很大。

英文摘要:

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.

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