Application of Regularization Methods in the Sky Map Reconstruction of the Tianlai Cylinder Pathfinder Array

• Published in: Research in astronomy and astrophysics Vol. 24; no. 2; pp. 25002 - 35
• Main Authors: Yu, Kaifeng, Zuo, Shifan, Wu, Fengquan, Wang, Yougang, Chen, Xuelei
• Format: Journal Article
• Language: English
• Published: Beijing National Astromonical Observatories, CAS and IOP Publishing 01.02.2024; IOP Publishing; Center of High Energy Physics,Peking University,Beijing 100871,China; School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China%National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China; School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China; National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China; Key Laboratory of Radio Astronomy and Technology,Chinese Academy of Sciences,Beijing 100101,China; Key Laboratory of Radio Astronomy and Technology,Chinese Academy of Sciences,Beijing 100101,China%National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China; Key Laboratory of Cosmology and Astrophysics(Liaoning)& College of Sciences,Northeastern University,Shenyang 110819,China
• Subjects: Arrays; Astronomical maps; cosmology: observations; Cylinders; Drift; Field of view; Interferometers; Inverse problems; Ionization; methods: numerical; Northern Hemisphere; Parameters; radio continuum: general; Radio interferometers; Regularization; Regularization methods; Singular value decomposition; Sky surveys (astronomy); techniques: interferometric; methods:numerical; techniques:interferometric; cosmology:observations; radio continuum:general

The Tianlai cylinder pathfinder is a radio interferometer array to test 21 cm intensity mapping techniques in the post-reionization era. It works in passive drift scan mode to survey the sky visible in the northern hemisphere. To deal with the large instantaneous field of view and the spherical sky,...