Neutral hydrogen in the post-reionization universe
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Author / Producer
Date
2017-10
Publication Type
Conference Paper
ETH Bibliography
yes
Citations
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Rights / License
Abstract
The evolution of neutral hydrogen (HI) across redshifts is a powerful probe of cosmology, large scale structure in the universe and the intergalactic medium. Using a data-driven halo model to describe the distribution of HI in the post-reionization universe (z ∼ 5 to 0), we obtain the best-fitting parameters from a rich sample of observational data: low redshift 21-cm emission line studies, intermediate redshift intensity mapping experiments, and higher redshift Damped Lyman Alpha (DLA) observations. Our model describes the abundance and clustering of neutral hydrogen across redshifts 0 - 5, and is useful for investigating different aspects of galaxy evolution and for comparison with hydrodynamical simulations. The framework can be applied for forecasting future observations with neutral hydrogen, and extended to the case of intensity mapping with molecular and other line transitions at intermediate redshifts.
Permanent link
Publication status
published
External links
Book title
Peering towards cosmic dawn
Journal / series
Volume
12 (S333)
Pages / Article No.
216 - 221
Publisher
Cambridge University Press
Event
333rd Symposium of the International Astronomical Union (IAUS333 2017)
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Cosmology: observations; Radio lines: galaxies; Galaxies : high redshift
Organisational unit
03928 - Refregier, Alexandre / Refregier, Alexandre
Notes
It was possible to publish this article open access thanks to a Swiss National Licence with the publisher.