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Title: Neutral hydrogen at high redshifts as a probe of structure formation - III: Radio maps from N-body simulations
Authors: Bagla, Jasjeet S.
Nath, Biman B.
Padmanabhan, T.
Issue Date: Aug-1997
Publisher: Royal Astronomical Society
Citation: Monthly Notices of the Royal Astronomical Society, 1997, Vol.289, p671
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 N-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 Lambda+CDM model in a universe with Omega_0+Omega_L=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.
Description: Restricted Access. An open-access version is available at (one of the alternative locations)
ISSN: 0035-8711
1365-2966 (Online)
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Copyright: 1997 Royal Astronomical Society
Appears in Collections:Research Papers (A&A)

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