论文标题
从开普勒超新星残留物中GEV排放的表征
Characterization of the GeV emission from the Kepler supernova remnant
论文作者
论文摘要
开普勒超新星残留物（SNR）是唯一缺乏探测粒子加速度的GEV和TEV能量的历史性超新星残留物。 Fermi-LAT数据的最新分析报道了SNR方向上可能有GEV伽马射线候选者。 Using approximately the same dataset but with an optimized analysis configuration, we confirm the gamma-ray candidate to a solid $>6σ$ detection and report a spectral index of $2.14 \pm 0.12_{\rm stat} \pm 0.15_{\rm syst}$ for an energy flux above 100 MeV of $(3.1 \pm 0.6_{\rm stat} \ pm 0.3 _ {\ rm syst}）\ times 10^{ - 12} $ erg〜cm $^{ - 2} $ 〜S $^{ - 1} $。伽马射线过量并未显着扩展，并且与SNR的无线电，红外或X射线空间分布完全兼容。我们通过模型成功地表征了这种多波长发射，其中加速粒子与SNR西北部的密集偶然物质相互作用，并通过$π^{o} $衰减辐射GEV伽马射线。 X射线同步加速器和逆孔普通（IC）发射主要源于南部地区的快速冲击，其磁场B $ \ sim $ 100 $ $ $ g或更高。根据精确的磁场幅度，TEV发射可能是由南部区域（IC主导）或相互作用区域（$π^{O} $衰减主导）的。
The Kepler supernova remnant (SNR) is the only historic supernova remnant lacking a detection at GeV and TeV energies which probe particle acceleration. A recent analysis of Fermi-LAT data reported a likely GeV gamma-ray candidate in the direction of the SNR. Using approximately the same dataset but with an optimized analysis configuration, we confirm the gamma-ray candidate to a solid $>6σ$ detection and report a spectral index of $2.14 \pm 0.12_{\rm stat} \pm 0.15_{\rm syst}$ for an energy flux above 100 MeV of $(3.1 \pm 0.6_{\rm stat} \pm 0.3_{\rm syst}) \times 10^{-12}$ erg~cm$^{-2}$~s$^{-1}$. The gamma-ray excess is not significantly extended and is fully compatible with the radio, infrared or X-ray spatial distribution of the SNR. We successfully characterized this multi-wavelength emission with a model in which accelerated particles interact with the dense circumstellar material in the North-West portion of the SNR and radiate GeV gamma-rays through $π^{o}$ decay. The X-ray synchrotron and inverse-Compton (IC) emission mostly stem from the fast shocks in the southern regions with a magnetic field B$\sim$100 $μ$G or higher. Depending on the exact magnetic field amplitude, the TeV emission could arise from either the South region (IC dominated) or the interaction region ($π^{o}$ decay dominated).
