Detection of the pairwise kinematic Sunyaev-Zel'dovich effect with BOSS DR11 and the Atacama Cosmology Telescope
Detection of the pairwise kinematic Sunyaev-Zel'dovich effect with BOSS DR11 and the Atacama Cosmology Telescope
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DOI：
10.1088/1475-7516/2017/03/008
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发表时间：
2016-07
影响因子：
6.4
通讯作者：
F. Bernardis;S. Aiola;E. Vavagiakis;N. Battaglia;M. Niemack;J. Beall;D. Becker;J. Bond;E. Calabrese;H. Cho;K. Coughlin;R. Datta;M. Devlin;J. Dunkley;R. Dunner;S. Ferraro;A. Fox;P. Gallardo;M. Halpern;N. Hand;M. Hasselfield;S. Henderson;J. Hill;G. Hilton;M. Hilton;A. Hincks;R. Hložek;J. Hubmayr;K. Huffenberger;J. Hughes;K. Irwin;B. Koopman;A. Kosowsky;D. Li;T. Louis;M. Lungu;M. Madhavacheril;L. Maurin;J. McMahon;K. Moodley;S. Naess;F. Nati;L. Newburgh;J. Nibarger;L. Page;B. Partridge;E. Schaan;B. Schmitt;N. Sehgal;J. Sievers;S. Simon;D. Spergel;S. Staggs;J. Stevens;R. Thornton;A. V. Engelen;J. Lanen;Edward J. Wollack
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文献类型：
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作者：
F. Bernardis;S. Aiola;E. Vavagiakis;N. Battaglia;M. Niemack;J. Beall;D. Becker;J. Bond;E. Calabrese;H. Cho;K. Coughlin;R. Datta;M. Devlin;J. Dunkley;R. Dunner;S. Ferraro;A. Fox;P. Gallardo;M. Halpern;N. Hand;M. Hasselfield;S. Henderson;J. Hill;G. Hilton;M. Hilton;A. Hincks;R. Hložek;J. Hubmayr;K. Huffenberger;J. Hughes;K. Irwin;B. Koopman;A. Kosowsky;D. Li;T. Louis;M. Lungu;M. Madhavacheril;L. Maurin;J. McMahon;K. Moodley;S. Naess;F. Nati;L. Newburgh;J. Nibarger;L. Page;B. Partridge;E. Schaan;B. Schmitt;N. Sehgal;J. Sievers;S. Simon;D. Spergel;S. Staggs;J. Stevens;R. Thornton;A. V. Engelen;J. Lanen;Edward J. Wollack
我们提出了一个新的测量的运动学Sunyaev-Zel'dovich效应使用的数据从阿塔卡玛宇宙望远镜（ACT）和重子振荡光谱巡天（BOSS）。使用600平方度的重叠天空区域，我们评估了与BOSS DR 11大尺度结构目录中50，000个明亮星系的位置相关的平均成对重子动量。一个非零信号来自包含样本星系的晕的大尺度运动。数据拟合的分析信号模型以及，与微波光子散射的光学深度作为一个自由参数确定的整体信号幅度。我们估计的协方差矩阵的平均成对动量作为星系分离的函数，使用微波天空模拟，折刀评估，和自助估计。最保守的基于模拟的误差给出了不同星系光度削减的信噪比估计在3.6和4.1之间。我们讨论了如何其他错误的测定可以导致更高的信噪比值，并考虑几种可能的系统误差的影响。从样本星系位置的平均热Sunyaev-Zel'dovich信号的光学深度的估计与从平均成对动量信号获得的光学深度的估计大致一致。
We present a new measurement of the kinematic Sunyaev-Zel'dovich effect using data from the Atacama Cosmology Telescope (ACT) and the Baryon Oscillation Spectroscopic Survey (BOSS). Using 600 square degrees of overlapping sky area, we evaluate the mean pairwise baryon momentum associated with the positions of 50,000 bright galaxies in the BOSS DR11 Large Scale Structure catalog. A non-zero signal arises from the large-scale motions of halos containing the sample galaxies. The data fits an analytical signal model well, with the optical depth to microwave photon scattering as a free parameter determining the overall signal amplitude. We estimate the covariance matrix of the mean pairwise momentum as a function of galaxy separation, using microwave sky simulations, jackknife evaluation, and bootstrap estimates. The most conservative simulation-based errors give signal-to-noise estimates between 3.6 and 4.1 for varying galaxy luminosity cuts. We discuss how the other error determinations can lead to higher signal-to-noise values, and consider the impact of several possible systematic errors. Estimates of the optical depth from the average thermal Sunyaev-Zel'dovich signal at the sample galaxy positions are broadly consistent with those obtained from the mean pairwise momentum signal.