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Article Dans Une Revue JCAP Année : 2023

Forecasts of CMB lensing reconstruction of AliCPT-1 from the foreground cleaned polarization data

Jiakang Han
  • Fonction : Auteur
Bin Hu
  • Fonction : Auteur
Siyu Li
  • Fonction : Auteur
Jiazheng Dou
  • Fonction : Auteur
Jing Jin
  • Fonction : Auteur
Hong Li
  • Fonction : Auteur
Yang Liu
  • Fonction : Auteur
Mathieu Remazeilles
  • Fonction : Auteur
Wen Zhao
  • Fonction : Auteur
Pengjie Zhang
  • Fonction : Auteur
Zheng-Wei Li
  • Fonction : Auteur
Cong-Zhan Liu
  • Fonction : Auteur
Yong-Jie Zhang
  • Fonction : Auteur
Chao-Lin Kuo
  • Fonction : Auteur
Xinmin Zhang
  • Fonction : Auteur

Résumé

Cosmic microwave background radiation (CMB) observations are unavoidably contaminated by emission from various extra-galactic foregrounds, which must be removed to obtain reliable measurements of the cosmological signal. In this paper, we demonstrate CMB lensing reconstruction in AliCPT-1 after foreground removal, combine the two bands of AliCPT-1 (90 and 150~GHz) with Planck HFI bands (100, 143, 217 and 353~GHz) and with the WMAP-K band (23~GHz). In order to balance contamination by instrumental noise and foreground residual bias, we adopt the Needlet Internal Linear Combination (NILC) method to clean the E-map and the constrained Internal Linear Combination (cILC) method to clean the B-map. The latter utilizes additional constraints on average frequency scaling of the dust and synchrotron to remove foregrounds at the expense of somewhat noisier maps. Assuming 4 modules observing 1 season from simulation data, the resulting effective residual noise in E- and B-map are roughly $15~\mu{\rm K}\cdot{\rm arcmin}$ and $25~\mu{\rm K}\cdot{\rm arcmin}$, respectively. As a result, the CMB lensing reconstruction signal-to-noise ratio (SNR) from polarization data is about SNR$\,\approx\,$4.5. This lensing reconstruction capability is comparable to that of other stage-III small aperture millimeter CMB telescopes.

Dates et versions

hal-04047046 , version 1 (27-03-2023)

Identifiants

Citer

Jiakang Han, Bin Hu, Shamik Ghosh, Siyu Li, Jiazheng Dou, et al.. Forecasts of CMB lensing reconstruction of AliCPT-1 from the foreground cleaned polarization data. JCAP, 2023, 04, pp.063. ⟨10.1088/1475-7516/2023/04/063⟩. ⟨hal-04047046⟩

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