High-resolution imaging of the cosmic mass distribution from gravitational lensing of pregalactic HI

Details High-resolution imaging of the cosmic mass distribution from gravitational lensing of pregalactic HI High-resolution imaging of the cosmic mass distribution from gravitational lensing of pregalactic HI

2006-11-28

arxiv.org/abs/astro-ph/0611862v2

Astronomy and Astrophysics

Astrophysics

revised and extended, more detailed predictions for observations, 25 pages, 11 figures, submitted to MNRAS

Scientific paper

Low-frequency radio observations of neutral hydrogen during and before the epoch of cosmic reionization will provide ~ 1000 quasi-independent source planes, each of precisely known redshift, if a resolution of ~1 arcminutes or better can be attained. These planes can be used to reconstruct the projected mass distribution of foreground material. Structure in these source planes is linear and gaussian at high redshift (30~ 10 MHz should be able to make mass maps of high quality. The planned Square Kilometer Array (SKA) may be able to map the mass with moderate signal-to-noise down to arcminute scales, depending on the reionization history of the universe and the ability to subtract foreground sources.

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