Constraining the rotational kinematic Sunyaev-Zel'dovich effect in massive galaxy clusters
Constraining the rotational kinematic Sunyaev-Zel'dovich effect in massive galaxy clusters
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DOI：
10.1088/1475-7516/2019/06/001
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发表时间：
2019-04
影响因子：
6.4
通讯作者：
E. Baxter;B. Sherwin;S. Raghunathan
中科院分区：
文献类型：
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作者：
E. Baxter;B. Sherwin;S. Raghunathan
我们约束的旋转运动学Sunyaev-Zel'dovich（rkSZ）的普朗克数据中使用的旋转星系团在斯隆数字巡天（SDSS）的样本的影响。我们从普朗克宇宙微波背景（CMB）的地图，已被清除的热SZ信号提取集群为中心的切口。使用以前的限制从星系的运动确定的集群旋转矢量，我们适合的振幅的rkSZ效应的CMB切口，边缘化的参数描述集群电子分布。我们还采用了一种替代的，较少依赖模型的方法来测量的rkSZ信号，涉及测量的偶极子诱导的rkSZ在旋转速度为导向的CMB堆栈。在这两种情况下，我们发现rkSZ信号与预期振幅和形态一致的大致2σ证据。我们评论的rkSZ信号的测量的未来方向。
We constrain the rotational kinematic Sunyaev-Zel'dovich (rkSZ) effect in Planck data using a sample of rotating galaxy clusters identified in the Sloan Digital Sky Survey (SDSS) . We extract cluster-centered cutouts from Planck cosmic microwave background (CMB) maps that have been cleaned of thermal SZ signal. Using previous constraints on the cluster rotation vectors determined from the motions of galaxies, we fit for the amplitude of the rkSZ effect in the CMB cutouts, marginalizing over parameters describing the cluster electron distribution. We also employ an alternative, less model-dependent approach to measuring the rkSZ signal that involves measuring the dipole induced by the rkSZ in rotation velocity-oriented CMB stacks. In both cases, we find roughly 2σ evidence for a rkSZ signal consistent with the expected amplitude and morphology. We comment on future directions for measurements of the rkSZ signal.