论文标题
年轻大型恒星群NGC 3603区域中4FGL J1115.1-6118的形态和光谱研究
Morphological and spectral study of 4FGL J1115.1-6118 in the region of the young massive stellar cluster NGC 3603
论文作者
论文摘要
我们报告了位于紧凑型恒星簇NGC 3603区域中的一个身份不明的伽马射线源的详细研究。这是一个由大量OB恒星提供动力的星形区域（SFR）。 Fermi Gamma -ray空间望远镜在船上提供了大约10年GEV -1 TEV的大约10年数据的专门分析，可产生指数式源的检测，其显着性为9 $σ$。源光子光谱可以由最佳拟合光谱指数$ 2.35 \ pm 0.03 $的幂律模型描述。此外，对0.5-7 keV频段中深色Chandra图像的分析可靠地排除了伽马射线外乳层的起源。我们还得出结论，可以通过松弛和辐射模型很好地解释点源的宽带光谱能量分布。没有发现与其他任何类别的已知伽马射线发射器相关的牢固证据，因此我们推测4FGL J1115.1-6118是伽马射线发射SFR。
We report a detailed study of an unidentified gamma-ray source located in the region of the compact stellar cluster NGC 3603. This is a star-forming region (SFR) powered by a massive cluster of OB stars. A dedicated analysis of about 10 years of data from 10 GeV - 1 TeV, provided by the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope, yields the detection of a pointlike source at a significance of 9$σ$. The source photon spectrum can be described by a power-law model with best fit spectral index of $2.35 \pm 0.03$. In addition, the analysis of a deep Chandra image in the 0.5 - 7 keV band reliably rules out an extragalactic origin for the gamma rays. We also conclude that the broadband spectral energy distribution of the point source can be explained well with both leptonic and hadronic models. No firm evidence of association with any other classes of known gamma-ray emitters is found, therefore we speculate that 4FGL J1115.1-6118 is a gamma-ray emitting SFR.
