Accurate method of modeling cluster scaling relations in modified gravity
Accurate method of modeling cluster scaling relations in modified gravity
复制标题
修正重力下簇尺度关系的精确建模方法
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Baojiu Li
中科院分区：
文献类型：
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作者：
Jian;Baojiu Li
提出了一种修正重力中星团尺度关系的新方法。通过一套非辐射流体动力学模拟，我们证明了累积气体量的尺度关系，如Sunyaev-Zel 'dovich效应（康普顿-y参数）和x射线康普顿-y参数，可以使用ΛCDM模型中的已知结果准确预测，精度为~ 3%。该方法提供了一种可靠的方法来分析修正重力下的气体物理，使用要求较低但效率更高的纯冷暗物质模拟。因此，我们的研究结果对利用星系团调查约束重力具有重要的理论和实践意义。
We propose a new method to model cluster scaling relations in modified gravity. Using a suite of nonradiative hydrodynamical simulations, we show that the scaling relations of accumulated gas quantities, such as the Sunyaev-Zel’dovich effect (Compton-y parameter) and the x-ray Compton-y parameter, can be accurately predicted using the known results in the ΛCDM model with a precision of ∼3%. This method provides a reliable way to analyze the gas physics in modified gravity using the less demanding and much more efficient pure cold dark matter simulations. Our results therefore have important theoretical and practical implications in constraining gravity using cluster surveys.