Probing IGM Physics during Cosmic Dawn using the Redshifted 21-cm Bispectrum

Autor:	Kamran, Mohd, Majumdar, Suman, Ghara, Raghunath, Mellema, Garrelt, Bharadwaj, Somnath, Pritchard, Jonathan R., Mondal, Rajesh, Iliev, Ilian T.
Rok vydání:	2021
Předmět:	Astrophysics - Cosmology and Nongalactic Astrophysics
Druh dokumentu:	Working Paper
Popis:	With the advent of the first luminous sources at Cosmic Dawn (CD), the redshifted 21-cm signal, from the neutral hydrogen in the Inter-Galactic Medium (IGM), is predicted to undergo a transition from absorption to emission against the CMB. Using simulations, we show that the redshift evolution of the sign and the magnitude of the 21-cm bispectrum can disentangle the contributions from Ly$\alpha$ coupling and X-ray heating of the IGM, the two most dominant processes which drive this transition. This opens a new avenue to probe the first luminous sources and the IGM physics at CD. Comment: 6 pages, 2 figures, comments are welcome
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2108.08201 Zobrazit plný text záznamu View this record from Arxiv