The Atacama Cosmology Telescope: a CMB lensing mass map over 2100 square degrees of sky and its cross-correlation with BOSS-CMASS galaxies
The Atacama Cosmology Telescope: a CMB lensing mass map over 2100 square degrees of sky and its cross-correlation with BOSS-CMASS galaxies
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DOI：
10.1093/mnras/staa3438
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发表时间：
2020-04
影响因子：
4.8
通讯作者：
O. Darwish;M. Madhavacheril;B. Sherwin;S. Aiola;N. Battaglia;J. Beall;D. Becker;J. Bond;E. Calabrese;Steve K. Choi;M. Devlin;J. Dunkley;R. Dunner;A. Fox;P. Gallardo;Yilun Guan;M. Halpern;Dongwon Han;M. Hasselfield;J. Hill;G. Hilton;M. Hilton;A. Hincks;S. Ho;J. Hubmayr;J. Hughes;B. Koopman;A. Kosowsky;J. Lanen;T. Louis;M. Lungu;Amanda Macinnis;L. Maurin;J. McMahon;K. Moodley;S. Naess;T. Namikawa;L. Newburgh;J. Nibarger;M. Niemack;B. Partridge;F. J. Qu;N. Robertson;B. Schmitt;N. Sehgal;C. Sif'on;D. Spergel;S. Staggs;E. Storer;A. V. Engelen;Edward J. Wollack
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作者：
O. Darwish;M. Madhavacheril;B. Sherwin;S. Aiola;N. Battaglia;J. Beall;D. Becker;J. Bond;E. Calabrese;Steve K. Choi;M. Devlin;J. Dunkley;R. Dunner;A. Fox;P. Gallardo;Yilun Guan;M. Halpern;Dongwon Han;M. Hasselfield;J. Hill;G. Hilton;M. Hilton;A. Hincks;S. Ho;J. Hubmayr;J. Hughes;B. Koopman;A. Kosowsky;J. Lanen;T. Louis;M. Lungu;Amanda Macinnis;L. Maurin;J. McMahon;K. Moodley;S. Naess;T. Namikawa;L. Newburgh;J. Nibarger;M. Niemack;B. Partridge;F. J. Qu;N. Robertson;B. Schmitt;N. Sehgal;C. Sif'on;D. Spergel;S. Staggs;E. Storer;A. V. Engelen;Edward J. Wollack
我们使用阿塔卡玛宇宙学望远镜（ACT）2014年和2015年观测季节的数据构建宇宙微波背景透镜质量图。这些地图覆盖了2100平方度的天空，并与各种光学测量重叠。这些地图在大尺度上以信号为主，并且具有保真度，使得它们与宇宙红外背景的相关性可以用眼睛清楚地看到。我们还使用一种新的清洁程序创建了去除了热Sunyaev−Zel'dovich污染的透镜映射，该清洁程序仅略微降低了透镜信噪比。清理后的透镜图和BOSS CMASS星系样本之间的交叉谱在10σ显著性下被检测到，相对于具有基准线性星系偏差的普朗克最佳拟合λ冷暗物质宇宙学模型，振幅为A = 1.02 ± 0.10。我们的测量为当前ACT数据及以后的透镜互相关科学奠定了基础。
We construct cosmic microwave background lensing mass maps using data from the 2014 and 2015 seasons of observations with the Atacama Cosmology Telescope (ACT). These maps cover 2100 square degrees of sky and overlap with a wide variety of optical surveys. The maps are signal dominated on large scales and have fidelity such that their correlation with the cosmic infrared background is clearly visible by eye. We also create lensing maps with thermal Sunyaev−Zel’dovich contamination removed using a novel cleaning procedure that only slightly degrades the lensing signal-to-noise ratio. The cross-spectrum between the cleaned lensing map and the BOSS CMASS galaxy sample is detected at 10σ significance, with an amplitude of A = 1.02 ± 0.10 relative to the Planck best-fitting Lambda cold dark matter cosmological model with fiducial linear galaxy bias. Our measurement lays the foundation for lensing cross-correlation science with current ACT data and beyond.