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Forecasts on CMB lensing observations with AliCPT-1

Science China(Physics,Mechanics & Astronomy) 2022年第10期65卷 115-129页

作者： Jinyi Liu Zeyang Sun Jiakang Han Julien Carron jacques delabrouille Siyu Li Yang Liu Jing Jin Shamik Ghosh Bin Yue Pengjie Zhang Chang Feng Zhi-Qi Huang Hao Liu Yi-Wen Wu Le Zhang Zi-Rui Zhang Wen Zhao Bin Hu Hong Li Xinmin Zhang Department of Astronomy Beijing Normal UniversityBeijing 100875China Department of Astronomy School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Shanghai Key Laboratory for Particle Physics and Cosmology Shanghai 200240China Division of Astronomy and Astrophysics Tsung-Dao Lee InstituteShanghai Jiao Tong UniversityShanghai 200240China D´epartement de Physique Th´eorique et CAP Universit´e de Gen`eveGen`eve CH-1211Switzerland CNRS-UCB International Research Laboratory Centre Pierre Bin´etruyCPB-IN2P3Berkeley IRL2007USA Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China CAS Key Laboratory for Researches in Galaxies and Cosmology Department of AstronomyUniversity of Science and Technology of ChinaChinese Academy of SciencesHefei 230026China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Physics and Optoelectronics Engineering Anhui UniversityHefei 230039China School of Physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China CSST Science Center for the Guangdong-Hong Kong-Macao Greater Bay Area Zhuhai 519082China Peng Cheng Laboratory Shenzhen 518000China Theoretical devision Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Ali CPT-1 is the first Chinese cosmic microwave background(CMB) experiment aiming for the high-precision measurement of CMB B-mode polarization. The telescope, currently under deployment in Tibet, will observe in two frequency bands centered at 90 and 150 GHz. We forecast the CMB lensing reconstruction, lensing-galaxy, and lensing-cosmic infrared background(CIB) cross-correlation signal-to-noise ratio(SNR) for Ali CPT-1. We consider two stages with different integrated observation times, namely “4 module*yr”(first stage) and “48 module*yr”(final stage). For lensing reconstruction, we use three different quadratic estimators, namely temperature-only, polarization-only and minimum-variance(MV) estimators, using curved sky geometry. We take into account the impacts of inhomogeneous hit counts and mean-field bias due to incomplete sky *** the first stage, our results show that the 150 GHz channel can measure the lensing signals at 15σ significance with the MV estimator. In the final stage, the measurement significance will increase to 31σ. We also combine the two frequency data in the harmonic domain to optimize the SNR. Our results show that the coadding procedure can significantly reduce the reconstruction bias in the high multiple range. Owning to the high quality of the polarization data in the final stage of Ali CPT-1, the EB estimator will dominate the lensing reconstruction in this stage. We also estimate the SNR of cross-correlations between Ali CPT-1 CMB lensing and other tracers of the large scale structure of the universe. For its cross-correlation with Dark Energy Spectroscopic Instrument(DESI) galaxies/quasars, we report the cross-correlation SNR = 10-20 for the four redshift bins at 0.05 < z < 2.1. In the first stage, the total SNR is approximately 32. In the final stage, the lensing-galaxy cross-correlation can reach SNR = 52. For lensing-CIB cross-correlation, in the first stage, the cross-correlations between Ali CPT-1 lensing and Planck CIB 353

关键词： background radiation cosmic cosmology gravitational lenses and luminous ares

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Erratum to:Forecasts on CMB lensing observations with AliCPT-1

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Science China(Physics,Mechanics & Astronomy) 2023年第9期66卷 200-200页

作者： Jinyi Liu Zeyang Sun Jiakang Han Julien Carron jacques delabrouille Siyu Li Yang Liu Jing Jin Shamik Ghosh Bin Yue Pengjie Zhang Chang Feng Zhi-Qi Huang Hao Liu Yi-Wen Wu Le Zhang Zi-Rui Zhang Wen Zhao Bin Hu Hong Li Xinmin Zhang Department of Astronomy Beijing Normal UniversityBeijing 100875China Department of Astronomy School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai200240China Shanghai Key Laboratory for Particle Physics and Cosmology Shanghai200240China Division of Astronomy and Astrophysics Tsung-Dao Lee InstituteShanghai Jiao Tong UniversityShanghai200240China D´epartement de Physique Th´eorique et CAP Universit´e de Gen`eveGen`eve CH-1211Switzerland CNRS-UCB International Research Laboratory Centre Pierre Bin´etruyCPB-IN2P3Berkeley IRL2007USA Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China CAS Key Laboratory for Researches in Galaxies and Cosmology Department of AstronomyUniversity of Science and Technology of ChinaChinese Academy of SciencesHefei 230026China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China National Astronomical Observatories Chinese Academy of SciencesBeijing100101China School of Physics and optoelectronics engineering Anhui UniversityHefei 230039China School of Physics and Astronomy Sun Yat-sen UniversityZhuhai519082China CSST Science Center for the Guangdong-Hong Kong-Macao Greater Bay Area Zhuhai 519082China Peng Cheng Laboratory Shenzhen 518000China Theoretical devision Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

One of the authors regrets that there was an omission of affiliation in this published article[1].The affiliation information of author Yi-WenWu only included the institution name for the author,and it is advised to a... 详细信息

关键词： observations CPT CMB

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