利用XMM-牛顿数据表征活动星系UGC11763核周围的发射和吸收介质
Characterization of the emitting and absorbing media around the nucleus of the active galaxy UGC11763 using XMM-Newton data
摘要：
目标。详细分析UGC 11763的XMM-牛顿卫星拍摄的所有数据，以确定活动核附近发射和吸收辐射的不同组件的特征。方法.利用这些相机的光谱范围，通过EPIC光谱研究了连续发射。高分辨率的RGS光谱进行了分析，以表征吸收功能和发射线的功能，出现在该源的光谱。结果光子指数为Γ= 1.72^{+0.03}-{0.01}的幂律解释了该源在10 - 1 keV硬X射线中的连续辐射。在较低的能量下，kT= 0.100 \pm 0.003 keV的黑体模型提供了一个很好的描述所观察到的软过剩。UGC 11763光谱中的吸收特征与视线中两相电离物质的存在一致（log U=1.65^{+0.07}_{-0.08}; 2.6 \pm 0.1和log N_{H} = 21.2 \pm 0.2; 21.51 \pm 0.01 cm^{-2}）。所发现的物理条件与处于压力平衡的两相相一致。低电离分量比其他塞弗特1星系中通常发现的温暖吸收体更电离。也有一些发射线的特征：Ovii He $α$（r），Ovii He $α$（f），Neix He $α$三重态和Fexviii在λ17.5 nm处的混合物。
英文摘要：
Aims. The detailed analysis of all data taken by the XMM-Newton satellite of UGC11763 to characterize the different components that are emitting and absorbing radiation in the vicinity of the active nucleus. Methods. The continuum emission was studied through the EPIC spectra taking profit of the spectral range of these cameras. The high resolution RGS spectra were analyzed in order to characterize the absorbing features and the emission line features that arise in the spectra of this source. Results. A power law with a photon index Γ= 1.72^{+0.03}_{-0.01} accounts for the continuum emission of this source in the hard X-rays from 10 down to 1 keV. At lower energies, a black body model with kT= 0.100\pm 0.003 keV provides a good description of the observed soft excess. The absorption signatures in the spectra of UGC11763 are consistent with the presence of a two phase ionized material (log U=1.65^{+0.07}_{-0.08}; 2.6\pm 0.1 and log N_{H} = 21.2\pm 0.2; 21.51\pm 0.01 cm^{-2}, respectively) in the line of sight. The physical conditions found are consistent with the two phases being in pressure equilibrium. The low ionization component is more ionized than typically found for warm absorbers in other Seyfert 1 galaxies. There are also signatures of some emission lines: Ovii He$α$(r), Ovii He$α$(f), a blend of the Neix He$α$ triplet and Fexviii at λ17.5 Å.
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