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The Neutral Islands during the Late Epoch of Reionization

Published online by Cambridge University Press:  08 May 2018

Yidong Xu
Affiliation:
Key Laboratory for Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: xuyd@nao.cas.cn
Bin Yue
Affiliation:
Key Laboratory for Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: xuyd@nao.cas.cn
Xuelei Chen
Affiliation:
Key Laboratory for Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: xuyd@nao.cas.cn University of Chinese Academy of Sciences, Beijing 100049, China Center for High Energy Physics, Peking University, Beijing 100871, China
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Abstract

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.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2018 

References

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