Smooth boundaries to cosmological H II regions from galaxy clustering

J. Stuart B. Wyithe; Abraham Loeb

doi:10.1111/j.1365-2966.2006.11201.x

Smooth boundaries to cosmological H II regions from galaxy clustering

J. Stuart B. Wyithe^*, Abraham Loeb

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The H II regions around quasars and galaxies at redshifts beyond the epoch of reionization will provide prime targets for upcoming 21-cm campaigns using a new generation of low-frequency radio observatories. Here we show that the boundaries of these H II regions will not be sharp. Rather, the clustering of sources near massive galaxies results in a neutral fraction that rises gradually towards large radii from an interior value near zero. A neutral fraction corresponding to the global background value is typically reached at a distance of 2-5 times the radius of the H II region around the central massive galaxy.

Original language	English
Pages (from-to)	960-964
Number of pages	5
Journal	Monthly Notices of the Royal Astronomical Society
Volume	374
Issue number	3
DOIs	https://doi.org/10.1111/j.1365-2966.2006.11201.x
Publication status	Published - Jan 2007
Externally published	Yes

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10.1111/j.1365-2966.2006.11201.x

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AU - Loeb, Abraham

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AB - The H II regions around quasars and galaxies at redshifts beyond the epoch of reionization will provide prime targets for upcoming 21-cm campaigns using a new generation of low-frequency radio observatories. Here we show that the boundaries of these H II regions will not be sharp. Rather, the clustering of sources near massive galaxies results in a neutral fraction that rises gradually towards large radii from an interior value near zero. A neutral fraction corresponding to the global background value is typically reached at a distance of 2-5 times the radius of the H II region around the central massive galaxy.

KW - Cosmology: theory

KW - Galaxies: high-redshift

KW - Quasars: general

UR - https://www.scopus.com/pages/publications/33846159107

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JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

Smooth boundaries to cosmological H II regions from galaxy clustering

Abstract

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