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首页> 外文期刊>The Astrophysical journal >SIMULATING THE SUNYAEV-ZELDOVICH EFFECT(S): INCLUDING RADIATIVE COOLING AND ENERGY INJECTION BY GALACTIC WINDS
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SIMULATING THE SUNYAEV-ZELDOVICH EFFECT(S): INCLUDING RADIATIVE COOLING AND ENERGY INJECTION BY GALACTIC WINDS

机译：模拟SUNYAEV-ZELDOVICH效应：包括银河风的辐射冷却和能量注入

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摘要

We present results on the thermal and kinetic Sunyaev-Zeldovich (SZ) effects from a sequence of high-resolution hydrodynamic simulations of structure formation, including cooling, feedback, and metal injection. These simulations represent a self-consistent thermal model that incorporates ideas from the "preheating" scenario while preserving good agreement with the low-density intergalactic medium at z ～ 3 probed by the Lyα forest. Four simulations were performed, at two different resolutions with and without radiative effects and star formation. The long-wavelength modes in each simulation were the same, so we can compare the results on an object-by-object basis. We demonstrate that our simulations are converged to the subarcminute level. The effect of the additional physics is to suppress the mean Comptonization parameter by 20% and to suppress the angular power spectrum of fluctuations by just under a factor of 2 in this model, while leaving the source counts and properties relatively unchanged. We quantify how non-Gaussianity in the SZ maps increases the sample variance over the standard result for Gaussian fluctuations. We identify a large scatter in the Y-M relation that will be important in searches for clusters using the SZ effect(s).
机译：我们提供了一系列结构形成的高分辨率流体力学模拟（包括冷却，反馈和金属注入）的热和动力学Sunyaev-Zeldovich（SZ）效应的结果。这些模拟代表了一个自洽的热模型，该模型结合了“预热”情景中的思想，同时与Lyα森林探测到的z〜3的低密度银河系中间介质保持了良好的一致性。在有和没有辐射效应和恒星形成的情况下，以两种不同的分辨率执行了四个模拟。每个模拟中的长波长模式都相同，因此我们可以逐个对象比较结果。我们证明了我们的模拟已经收敛到亚弧级别。在此模型中，附加物理学的作用是将平均Comptonization参数抑制20％，并将波动的角功率谱抑制在2左右，同时使源计数和属性相对不变。我们量化SZ映射中的非高斯性如何使样本方差超过高斯起伏的标准结果。我们在Y-M关系中发现了一个较大的散点，这对于使用SZ效应搜索簇非常重要。

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