Modelling the 21-cm Signal from the Epoch of Reionization and Cosmic Dawn

Journal of astrophysics and astronomy

Raghunath Ghara⁴  T. Roy Choudhury1⁴  Suman Majumdar⁵  Rajesh Mondal³  Saumyadip Samui¹  Aseem Paranjape²  Kanan Datta¹  Somnath Bharadwaj³ 

[1] Department of Physics, Presidency University, 86/1 College Street, Kolkata 700 073, India.$$;Inter-University Center for Astronomy and Astrophysics, Post Bag 4, Ganeshkhind, Pune 411 007, India.$$;Department of Physics and Centre for Theoretical Studies, Indian Institute of Technology Kharagpur, Kharagpur 721 302, India.$$;National Centre for Radio Astrophysics,Tata Institute of Fundamental Research, Post Bag No. 3, Ganeshkhind, Pune 411 007, India.$$;Department of Physics, Blackett Laboratory, Imperial College, London SW7 2AZ, UK.$$

关键词: Intergalactic medium;    cosmology: theory;    dark ages;    reionization;    first stars;    diffuse radiation;    large-scale structure of Universe;    methods: numerical;    methods: statistical.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

Studying the cosmic dawn and the epoch of reionization through the redshifted 21-cm line are among the major science goals of the SKA1. Their significance lies in the fact that they are closely related to the very first stars in the Universe. Interpreting the upcoming data would require detailed modelling of the relevant physical processes. In this article, we focus on the theoretical models of reionization that have been worked out by various groups working in India with the upcoming SKA in mind. These models include purely analytical and semi-numerical calculations as well as fully numerical radiative transfer simulations. The predictions of the 21-cm signal from these models would be useful in constraining the properties of the early galaxies using the SKA data.

【 授权许可】

Unknown