SEARCHING FOR OVERIONIZED PLASMA IN THE GAMMA-RAY-EMITTING SUPERNOVA REMNANT G349.7+0.2
SEARCHING FOR OVERIONIZED PLASMA IN THE GAMMA-RAY-EMITTING SUPERNOVA REMNANT G349.7+0.2
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DOI：
10.1088/0004-637x/804/2/124
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发表时间：
2015-03
期刊：
影响因子：
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通讯作者：
T. Ergin;A. Sezer;L. Saha;P. Majumdar;F. Gök;E. Ercan
中科院分区：
文献类型：
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作者：
T. Ergin;A. Sezer;L. Saha;P. Majumdar;F. Gök;E. Ercan
G349.7+0.2是一颗超新星遗迹(SNR)，它在致密的分子云介质中膨胀，并与发射伽马射线的分子物质团相互作用。我们分析了费米伽马射线空间望远镜上的大面积望远镜的伽马射线数据，在0.2GeV-300GeV的能量范围内探测到了G349.7+0.2，意义为∼13σ，没有显示出扩展的形态。对伽马能谱的模拟表明，GeV的伽马射线辐射主要来自中性介子的衰变，其中质子遵循破缺的幂分布，在∼12GeV处有光谱断裂。为了寻找残骸东部和西部地区的辐射复合连续性特征，我们分析了G349.7+0.2的Suzaku数据，没有发现过电离等离子体的证据。在这篇文章中，我们讨论了解释G349.7+0.2中强子伽马射线发射的可能情景，以及这种信噪比的混合形态性质。
G349.7+0.2 is a supernova remnant (SNR) expanding in a dense medium of molecular clouds and interacting with clumps of molecular material emitting gamma-rays. We analyzed the gamma-ray data of the Large Area Telescope on board the Fermi Gamma-Ray Space Telescope and detected G349.7+0.2 in the energy range of 0.2–300 GeV with a significance of ∼13σ, showing no extended morphology. Modeling of the gamma-ray spectrum revealed that the GeV gamma-ray emission dominantly originates from the decay of neutral pions, where the protons follow a broken power-law distribution with a spectral break at ∼12 GeV. To search for features of radiative recombination continua in the eastern and western regions of the remnant, we analyzed the Suzaku data of G349.7+0.2 and found no evidence for overionized plasma. In this paper, we discuss possible scenarios to explain the hadronic gamma-ray emission in G349.7+0.2 and the mixed morphology nature of this SNR.