Sculptor壁中WHIM的X射线吸收
X-Ray Absorption By WHIM in the Sculptor Wall
摘要：
我们提出了XMM RGS和钱德拉LETG观测的耀变体，H 2356 - 309，位于后面的雕塑家墙，一个大规模的星系结构，预计港口高密度的温热星系际介质（WHIM）。我们对RGS和LETG光谱的同时分析产生了对关键的红移O vii K-α线的3-sigma检测，其柱密度（>~10 ^{16} cm ^{-2}）与宇宙学模拟中产生的类似大尺度结构一致。这代表了第一次检测到非本地WHIM从X射线吸收研究，XMM和钱德拉数据进行了分析，同时吸收体红移是已知的，从而提供了强大的证据，预期的存储库的"失踪重子"。
英文摘要：
We present XMM RGS and Chandra LETG observations of the blazar, H 2356-309, located behind the Sculptor Wall, a large-scale galaxy structure expected to harbor high-density Warm-Hot Intergalactic Medium (WHIM). Our simultaneous analysis of the RGS and LETG spectra yields a 3-sigma detection of the crucial redshifted O vii K-alpha line with a column density (>~ 10^{16} cm^{-2}) consistent with similar large-scale structures produced in cosmological simulations. This represents the first detection of non-local WHIM from X-ray absorption studies where XMM and Chandra data are analyzed simultaneously and the absorber redshift is already known, thus providing robust evidence for the expected repository of the "missing baryons".
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