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arXiv 1109.4658astro-ph.HE
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用费米LAT对超新星遗迹RX J0852 .0-4622的Gamma-Ray观测

Gamma-Ray Observations of the Supernova Remnant RX J0852.0-4622 with the Fermi LAT

T. Tanaka, A. Allafort, J. Ballet, S. Funk, F. Giordano, J. Hewitt, M. Lemoine-Goumard, H. Tajima, O. Tibolla, Y. Uchiyama

摘要:

本文报道了费米伽马射线空间望远镜上的大视场望远镜(LAT)对超新星遗迹(SNR)RX J0852.0-4622的伽马射线观测。在费米LAT数据中,我们在SNR的位置处发现了空间扩展源。该扩展与在其他波长(例如X射线和TeV伽马射线)中看到的SNR大小一致,从而导致用SNR识别伽马射线源。光谱被很好地描述为具有伽马= 1.85 +/- 0.06(stat)(+0.18,-0.19)(sys)的光子指数的幂律,其平滑地连接到H.E.S.S.在TeV能量带中的光谱。我们讨论了基于多波长数据的γ射线发射机制。宽带数据可以很好地拟合的模型,其中的γ射线是强子起源。我们还考虑了一个方案与逆康普顿散射的电子作为伽马射线的发射机制。虽然轻子模型预测的费米LAT能区的光谱较硬,但考虑到统计误差和系统误差,该模型可以拟合数据。

英文摘要:

We report on gamma-ray observations of the supernova remnant (SNR) RX J0852.0-4622 with the Large Area Telescope (LAT) aboard the Fermi Gamma-ray Space Telescope. In the Fermi LAT data, we find a spatially extended source at the location of the SNR. The extension is consistent with the SNR size seen in other wavelengths such as X-rays and TeV gamma rays, leading to the identification of the gamma-ray source with the SNR. The spectrum is well described as a power law with a photon index of Gamma = 1.85 +/- 0.06 (stat) (+0.18,-0.19) (sys), which smoothly connects to the H.E.S.S. spectrum in the TeV energy band. We discuss the gamma-ray emission mechanism based on multiwavelength data. The broadband data can be fit well by a model in which the gamma rays are of hadronic origin. We also consider a scenario with inverse Compton scattering of electrons as the emission mechanism of the gamma rays. Although the leptonic model predicts a harder spectrum in the Fermi LAT energy range, the model can fit the data considering the statistical and systematic errors.

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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