论文标题
修订了用fermi-lat中的$γ$ ray排放
Revised the $γ$-ray emission from SNR CTB 109 with Fermi-LAT
论文作者
论文摘要
CTB 109是具有明亮的热X射线发射的中年壳型SNR。我们使用Fermi大面积望远镜（Fermi-Lat）记录的13年通行证8个数据将CTB 109的GEV $γ$ ray排放量重新分析。 CTB 109的$γ$射线发射显示了中心明亮的形态，这与无线电频带中的热X射线发射而不是壳体型结构一致。光谱分析表明，GEV $γ$ -Ray频谱的几个GEV处于$ \ sim $的光谱曲率，这自然可以解释CTB 109中缺乏TEV $γ$ -Ray的发射。尽管Leptonic或HADRONIC模型可以符合CTB 109的多波长观察，但要符合CTB 109的模型，并且是$ nor predise us us us us us us us us us us us us us us us us us us us us us us n hadronic Morpus，是$ nor oss $ ns Hudronic Morth是$ ns Hadronic模型。 GEV光谱的曲率。具有其他SNR的CTB 109的不寻常的$γ$ -Ray频谱和光度直径平方关系使CTB 109与具有硬GEV $γ$ ray Spectra的年轻SNR和几个与分子云相互作用的旧snR区分开。
CTB 109 is a middle-aged shell-type SNR with bright thermal X-ray emission. We reanalyze the GeV $γ$-ray emission from CTB 109 using thirteen years of Pass 8 data recorded by the Fermi Large Area Telescope (Fermi-LAT). The $γ$-ray emission of CTB 109 shows a center bright morphology, which is well consistent with its thermal X-ray emission rather than the shell-type structure in the radio band. The spectral analysis shows an evident spectral curvature at $\sim$ several GeV for the GeV $γ$-ray spectrum, which can naturally explain the lack of TeV $γ$-ray emission from CTB 109. Although either a leptonic or a hadronic model could fit the multi-wavelength observations of CTB 109, the hadronic model is favored considering its $γ$-ray morphology and the spectral curvature of GeV spectrum. The unusual $γ$-ray spectrum of CTB 109 with other SNRs and the luminosity-diameter squared relation make CTB 109 to be distinguished both from the young-aged SNRs with hard GeV $γ$-ray spectra and several old-aged SNRs interacting with molecular clouds.
