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XMM-NEWTON DETECTION OF A COMPTON-THICK AGN IN THE 1 Jy ULIRG/LINER F04103-2838

机译:1 Jy ULIRG / LINER F04103-2838中X轴牛顿的XMM牛顿检测

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摘要

We report on the detection of Fe Ka emission in F04103-2838, an ultraluminous infrared galaxy [ULIRG; log(L_(IR)/L_⊙) ≥ 12] optically classified as a LINER. Previous Chandra observations suggested the presence of both a starburst and an active galactic nucleus (AGN) in this source. A deeper (~20 ks) XMM-Newton spectrum reveals an Fe Kα line at rest-frame energy ~6.4 keV, which is consistent with cold neutral iron. The best-fit spectral model indicates that the Fe Kα line has an equivalent width of ~1.6 keV. The hard X-ray emission is dominated by a Compton-thick AGN with an intrinsic 0.2-10 keV luminosity of ~ 10~(44) ergs s~(-1), while the soft X-ray emission is from ~ 0.1 keV gas attributed to the starburst. The X-ray spectrum of this source bears a striking resemblance to that of the archetypal luminous infrared galaxy NGC 6240, despite differences in merger state and infrared properties.
机译:我们报告了在F04103-2838(超发光红外星系[ULIRG; log(L_(IR)/L_⊙)≥12]从光学上分类为线性。钱德拉先前的观察表明,该来源同时存在星爆和活跃的银河核(AGN)。较深的XMM-牛顿光谱(约20 ks)揭示了在静框架能量〜6.4 keV处的FeKα线,这与冷中性铁一致。最佳拟合光谱模型表明FeKα线的等效宽度为〜1.6 keV。硬X射线的发射主要是Compton厚的AGN,其固有的0.2-10 keV光度为〜10〜(44)ergs s〜(-1),而软X射线的发射源为〜0.1 keV的气体。归因于爆炸。尽管合并状态和红外特性有所不同,但该源的X射线光谱与原型发光红外星系NGC 6240的光谱极为相似。

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