Performance forecasts for the primordial gravitational wave detection pipelines for AliCPT-1

被引:27
作者
Ghosh, Shamik [1 ,2 ]
Liu, Yang [3 ]
Zhang, Le [4 ,5 ,15 ]
Li, Siyu [3 ]
Zhang, Junzhou [4 ]
Wang, Jiaxin [6 ]
Dou, Jiazheng [1 ,2 ]
Chen, Jiming [1 ,2 ]
Delabrouille, Jacques [7 ]
Remazeilles, Mathieu [8 ]
Feng, Chang [1 ,2 ]
Hu, Bin [9 ]
Huang, Zhi-Qi [4 ,5 ]
Liu, Hao [3 ,10 ]
Santos, Larissa [11 ]
Zhang, Pengjie [6 ,12 ,13 ]
Zhang, Zhaoxuan [4 ]
Zhao, Wen [1 ,2 ]
Li, Hong [3 ]
Zhang, Xinmin [14 ]
机构
[1] Chinese Acad Sci, Univ Sci & Technol China, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China
[2] Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China
[3] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, 19B Yuquan Rd, Beijing 100049, Peoples R China
[4] Sun Yat sen Univ, Sch Phys & Astron, 2 Daxue Rd, Tangjia 519082, Zhuhai, Peoples R China
[5] CSST Sci Ctr Guangdong Hong Kong Macau Greater Bay, Hong Kong 519082, Peoples R China
[6] Shanghai Jiao Tong Univ, Sch Phys & Astron, Dept Astron, Shanghai 200240, Peoples R China
[7] CPB IN2P3, CNRS UCB Int Res Lab, Ctr Pierre Binetruy, IRL2007, Berkeley, CA USA
[8] Inst Fis Cantabria CSIC UC, Ave Castros s-n, Santander 39005, Spain
[9] Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
[10] Anhui Univ, Sch Phys & Optoelect Engn, 111 Jiulong Rd, Hefei 230601, Peoples R China
[11] Yangzhou Univ, Coll Phys Sci & Technol, Ctr Gravitat & Cosmol, Yangzhou 225009, Peoples R China
[12] Shanghai Key Lab Particle Phys & Cosmol, Shanghai 200240, Peoples R China
[13] Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Div Astron & Astrophys, Shanghai 200240, Peoples R China
[14] Chinese Acad Sci, Inst High Energy Phys, Theoret devis, 19B Yuquan Rd, Beijing 100049, Peoples R China
[15] Peng Cheng Lab, 2,Xingke 1st St, Shenzhen 518000, Peoples R China
基金
国家重点研发计划;
关键词
CMBR experiments; cosmological parameters from CMBR; INFLATIONARY UNIVERSE SCENARIO; LINEAR COMBINATION METHOD; POWER SPECTRUM ESTIMATION; B-MODE POLARIZATION; COMPONENT SEPARATION; STATISTICAL-ANALYSIS; PHASE-TRANSITION; GRAVITY-WAVES; CMB; ANISOTROPY;
D O I
10.1088/1475-7516/2022/10/063
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
AliCPT is the first Chinese cosmic microwave background (CMB) experiment which will make the most precise measurements of the CMB polarization in the northern hemisphere. The key science goal for AliCPT is the detection of primordial gravitational waves (PGWs). It is well known that an epoch of cosmic inflation, in the very early universe, can produce PGWs, which leave an imprint on the CMB in form of odd parity B-mode polar-ization. In this work, we study the performance of the component separation and parameter estimation pipelines in context of constraining the value of the tensor-to-scalar ratio. Based on the simulated data for one observation season, we compare five different pipelines with dif-ferent working principles. Three pipelines perform component separation at map or spectra level before estimating r from the cleaned spectra, while the other two pipelines performs a global fit for both foreground parameters and r. We also test different methods to account for the effects of time stream filtering systematics. This work shows that our pipelines provide consistent and robust constraints on the tensor-to-scalar ratio and a consistent sensitivity sigma(r) similar to 0.02. This showcases the potential of precise B-mode polarization measurement with AliCPT-1. AliCPT will provide a powerful opportunity to detect PGWs, which is comple-mentary with various ground-based CMB experiments in the southern hemisphere.
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收藏
页数:36
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