Probing IGM Physics during Cosmic Dawn using the Redshifted 21-cm Bispectrum
Cosmology and Nongalactic Astrophysics
2023-07-04 v3
Abstract
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 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.
Keywords
Cite
@article{arxiv.2108.08201,
title = {Probing IGM Physics during Cosmic Dawn using the Redshifted 21-cm Bispectrum},
author = {Mohd Kamran and Suman Majumdar and Raghunath Ghara and Garrelt Mellema and Somnath Bharadwaj and Jonathan R. Pritchard and Rajesh Mondal and Ilian T. Iliev},
journal= {arXiv preprint arXiv:2108.08201},
year = {2023}
}
Comments
6 pages, 2 figures, comments are welcome