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The Neutral Islands during the Late Epoch of Reionization

Published online by Cambridge University Press:  08 May 2018

Yidong Xu Open the ORCID record for Yidong Xu [Opens in a new window] ,
Bin Yue  and
Xuelei Chen
Yidong Xu
Affiliation:
Key Laboratory for Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: [email protected]
Bin Yue
Affiliation:
Key Laboratory for Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: [email protected]
Xuelei Chen
Affiliation:
Key Laboratory for Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: [email protected] University of Chinese Academy of Sciences, Beijing 100049, China Center for High Energy Physics, Peking University, Beijing 100871, China
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Abstract

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The large-scale structure of the ionization field during the epoch of reionization (EoR) can be modeled by the excursion set theory. While the growth of ionized regions during the early stage are described by the “bubble model”, the shrinking process of neutral regions after the percolation of the ionized region calls for an “island model”. An excursion set based analytical model and a semi-numerical code (islandFAST) have been developed. The ionizing background and the bubbles inside the islands are also included in the treatment. With two kinds of absorbers of ionizing photons, i.e. the large-scale under-dense neutral islands and the small-scale over-dense clumps, the ionizing background are self-consistently evolved in the model.

Keywords

cosmology: theoryintergalactic mediumlarge-scale structure of universe
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S333: Peering towards Cosmic Dawn , October 2017 , pp. 64 - 67
Copyright
Copyright © International Astronomical Union 2018 

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