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Lensing z Dynamics in the Galaxy Cluster MS2137-23

机译:Galaxy Cluster中的镜头和Z动态MS2137-23

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Abstract. We present a new model of the lensing cluster of galaxies MS2137-23 By incorporating strong and weak lensing data in a fully elliptical lens modeling, we show that the total density profile must be close to the predictions of numerical simulations with an inner slope well consistent with a NFW profile. The model that best fits the lensing constraints is used to infer to line-of-sight velocity distribution (LOSVD) of stars in the central cD galaxy This distribution is found to be far from Maxwellian. The important non-Gaussian tails produce a significant low-bias when measuring the velocity dispersion by assuming Gaussian absorption lines. In the case of MS2137, most of the information comes from multiples arcs Internal kinematics of stars only help modeling the innermost kilopaisecs. However, in clusters with fewer constraints (no radial arcs for instance), a detailed modeling of both strong lensing and internal kinematics is crucial
机译:抽象的。我们通过在完全椭圆透镜建模中掺入强且弱的镜头数据,介绍了一系列Galaxies MS2137-23的新模型,我们表明总密度剖面必须接近数值模拟的预测,其内斜率很好使用NFW配置文件。最适合镜头约束的模型用于推断到中央CD银河系中的恒星的视线速度分布(Losvd),发现该分布远离Maxwellian。当通过假设高斯吸收管线测量速度分散时,重要的非高斯尾部产生显着的低偏差。在MS2137的情况下,大多数信息来自倍数弧内部运动学的恒星仅帮助建模最内千宽度。然而,在具有较少约束的集群(例如,没有径向弧),强大的镜头和内部运动学的详细建模至关重要

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