Neutral hydrogen at high redshifts as a probe of structure formation - III. Radio maps from TV-body simulations
Open Access
- 11 August 1997
- journal article
- research article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 289 (3) , 671-680
- https://doi.org/10.1093/mnras/289.3.671
Abstract
Large inhomogeneities in neutral hydrogen in the Universe can be detected at redshifts z≤10 using the redshifted 21-cm line emission. We use cosmological TV- body simulations for dark matter and a simple model for baryonic collapse to estimate the signal expected from structures like protoclusters of galaxies at high redshifts. We study (i) the standard cold dark matter (CDM) model, (ii) a modified CDM model with less power at small scales, and (iii) a A + CDM model in a universe with Ω0 + Ω^ = 1. We show that it should be possible for the next generation of radio telescopes to detect such structures at a redshift of 3.34 with an integration of about 100 h. We also discuss possible schemes for enhancing signal-to-noise ratio to detect protocondensates at high redshifts.Keywords
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