$z \sim 2.5$透镜类星体2 MASS J1042 +1641的X射线吸收和后处理
X-ray Absorption and Reprocessing in the $z \sim 2.5$ Lensed Quasar 2MASS J1042+1641
摘要：
我们提出了新的宽带X射线观测的$z \sim 2.5$透镜类星体2 MASS J1042+1641，结合$XMM$ - $Newton$，$Chandra$和$NuSTAR$提供的X射线光谱的0.3 $-$ 40 keV的带通在所观察到的帧，对应于$\sim$ 1 $-$ 140 keV频带在2 MASS J1042+1641的休息帧。X射线数据显示出强烈的（但仍然是康普顿薄的）X射线吸收的明确证据，除了由康普顿厚的材料进行的重要再处理之外，这些材料必须远离我们的视线到中心X射线源。我们测试两种不同的解释，后者：第一，再加工发生在一个经典的活动星系核环面，调用统一模型，第二，再加工发生在吸积盘。这两种模型都能成功地再现观测到的光谱，并且都意味着尽管有很强的视线吸收，但源仍以中等低的倾角（$i < 50^{\circ}$）被观测到。结合X射线数据和来自$WISE$的红外数据，从2 MASS J1042+1641看到的结果进一步支持了最近的建议，即大X射线和红外测量一起可能能够在详细的成像研究之前识别出良好的透镜类星体候选者。
英文摘要：
We present new broadband X-ray observations of the $z \sim 2.5$ lensed quasar 2MASS J1042+1641, combining $XMM$-$Newton$, $Chandra$ and $NuSTAR$ to provide coverage of the X-ray spectrum over the 0.3$-$40 keV bandpass in the observed frame, corresponding to the $\sim$1$-$140 keV band in the rest-frame of 2MASS J1042+1641. The X-ray data show clear evidence for strong (but still Compton-thin) X-ray absorption, $N_{\rm{H}} \sim 3-4 \times 10^{23}$ cm$^{-2}$, in addition to significant reprocessing by Compton-thick material that must lie away from our line-of-sight to the central X-ray source. We test two different interpretations for the latter: first that the reprocessing occurs in a classic AGN torus, as invoked in unification models, and second that the reprocessing occurs in the accretion disc. Both models can successfully reproduce the observed spectra, and both imply that the source is viewed at moderately low inclinations ($i < 50^{\circ}$) despite the heavy line-of-sight absorption. Combining the X-ray data with infrared data from $WISE$, the results seen from 2MASS J1042+1641 further support the recent suggestion that large X-ray and IR surveys may together be able to identify good lensed quasar candidates in advance of detailed imaging studies.
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