Quantifying the statistics of CMB-lensing-derived galaxy cluster mass measurements with simulations

Quantifying the statistics of CMB-lensing-derived galaxy cluster mass measurements with simulations
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通过模拟量化 CMB 透镜衍生的星系团质量测量的统计数据

DOI:
10.1093/mnras/staa2302
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发表时间:
2020
影响因子:
4.8
通讯作者:
A. Challinor
A. Challinor
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
'Inigo Zubeldia;A. Challinor

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CMB透镜是一种有前途的,新颖的方法来测量星系团的质量,可以使用,例如,用于星系团计数分析中的质量校准。如果在随后的分析中使用这些测量结果不会导致有偏见的结果,那么了解通过这些测量获得的可观测星系团质量的统计数据是至关重要的。我们研究了一个CMB透镜星系团质量的统计观测的类普朗克实验与模拟观测从N体模拟。我们量化的偏见和内在的散射与此观察到以下两种不同的方法,其中一种是由于集群和附近的相关大尺度结构的信号被隔离,另一种是由于不相关的大尺度结构的变化也被考虑在内。对于我们的第一种方法,我们还量化了散射中对数正态性的偏差,发现它们对我们的类普朗克实验的质量校准的影响可以忽略不计。我们简要地讨论了我们的一些结果如何改变实验具有较高的角分辨率和较低的噪声水平,如目前这一代的调查获得地面,大口径望远镜。
CMB lensing is a promising, novel way to measure galaxy cluster masses that can be used, e.g., for mass calibration in galaxy cluster counts analyses. Understanding the statistics of the galaxy cluster mass observable obtained with such measurements is essential if their use in subsequent analyses is not to lead to biased results. We study the statistics of a CMB lensing galaxy cluster mass observable for a Planck-like experiment with mock observations obtained from an N-body simulation. We quantify the bias and intrinsic scatter associated with this observable following two different approaches, one in which the signal due to the cluster and nearby correlated large-scale structure is isolated, and another one in which the variation due to uncorrelated large-scale structure is also taken into account. For our first approach we also quantify deviations from log-normality in the scatter, finding them to have a negligible impact on mass calibration for our Planck-like experiment. We briefly discuss how some of our results change for experiments with higher angular resolution and lower noise levels, such as the current generation of surveys obtained with ground-based, large-aperture telescopes.
DOI: 10.2172/1352047
发表时间: 2016-10
期刊: --
影响因子: --
作者:
K. Abazajian;Peter Adshead;Z. Ahmed;S. Allen;D. Alonso;K. Arnold;C. Baccigalupi;J. Bartlett;
通讯作者: K. Abazajian;Peter Adshead;Z. Ahmed;S. Allen;D. Alonso;K. Arnold;C. Baccigalupi;J. Bartlett;
DOI: 10.3847/0004-637x/832/1/95
发表时间: 2016
期刊: The Astrophysical Journal
影响因子: --
作者:
T. de Haan [SPT Collaboration]
通讯作者: T. de Haan [SPT Collaboration]
DOI: 10.1093/mnras/stw2722
发表时间: 2017
影响因子: 4.8
作者:
Barnes D
通讯作者: Barnes D