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arXiv 0711.4046astro-ph
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反对超新星遗迹VHE辐射的主要强子起源的争论

Arguments against a dominantly hadronic origin of the VHE radiation from the supernova remnant RX J1713-3946

R. Plaga

摘要:

在“强子对撞机”中计算了从附近的南方超新星遗迹(SNR)RX J1713.7-3946的中心和西部云的方向上能量超过1 TeV的光子通量,该强子对撞机旨在解释来自该遗迹的强烈VHE辐射与核碰撞中产生的π_0 π介子的衰变。从其中心的预期流量被发现从HESS合作观察到的一个下降约40倍。这种差异对“强子对撞机”提出了严重的障碍。理论上预期的分子云通量超过HESS观测到的通量至少3倍。虽然在各种理论不确定性面前,这种差异的大小似乎仍然可以接受,但结果强烈表明,云与过量TeV γ辐射存在严格的空间相关性。在HESS报告的遗迹中观测到的这种相关性的缺乏是对强子方案的另一个反驳。在组合中,这些论点不能通过选择SNR的总能量或加速效率的某些参数来反驳。

英文摘要:

The flux of photons with energies above 1 TeV from the direction of the centre and a cloud in the western part of the nearby southern supernova remnant (SNR) RX J1713.7-3946 is calculated in the ``hadronic scenario'' that aims to explain the intense VHE radiation from this remnant with the decay of π_0 pions produced in nuclear collisions. The expected flux from its centre is found to fall short by about factor 40 from the one observed by the HESS collaboration. This discrepancy presents a serious obstacle to the ``hadronic scenario''. The theoretically expected flux from the molecular cloud exceeds the one observed by HESS by at least a factor 3. While the size of this discrepancy might still seem acceptable in the face of various theoretical uncertainties, the result strongly suggests a strict spatial correlation of the cloud with an excess of TeV γradiation. The observational lack of such correlations in the remnant reported by HESS is another counter argument against the hadronic scenario. In combination these arguments cannot be refuted by choosing certain parameters for the total energy or acceleration efficiency of the SNR.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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