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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.
|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 arXiv.org (one of the alternative locations)|
|Copyright:||1997 Royal Astronomical Society|
|Appears in Collections:||Research Papers (A&A)|
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