HI 21cm probes of reionization, and beyond

2005/09/02 by C. L. Carilli · 13 citations
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #COSMIC cancer database #Galaxies: Formation, Evolution, Phenomena #Galaxy #Hydrogen line #Line (geometry) #Physics #Radio Astronomy Observations and Technology #Redshift #Reionization #Scale (ratio) #Spectral line #astro-ph

paper · pdf · doi:10.1016/j.newar.2005.11.031

published in New Astronomy Reviews 50(1-3), 162-172 (Elsevier BV) · "First light and reionization," New Astronomy Reviews, eds. A. Cooray & E. Barton; 20 pages, elsart12.sty, fixed typo

arxiv created 2005/09/02 · openalex publication_date 2006/01/06 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

I review the potential for observing cosmic reionization using the HI 21cm line of neutral hydrogren. Studies include observations of the evolution of large scale structure of the IGM (density, excitation temperature, and neutral fraction), through HI 21cm emission, as well as observations of small to intermediate scale structure through absorption toward the first discrete radio sources. I summarize predictions for the HI signals, then consider capabilities of facilities being built, or planned, to detect these signals. I also discuss the significant observational challenges.

Citations

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