---
_id: '17746'
abstract:
- lang: eng
  text: For a source of Lyα radiation embedded in a neutral intergalactic medium (IGM)
    prior to the reionization epoch, the Lyα emission line is strongly suppressed
    by the intervening IGM. The damping wing of the so-called Gunn-Peterson trough
    can extend to the red side of the emission line and erase a significant fraction
    of the total line flux. However, the transmitted fraction increases with the size
    of the local cosmological H II region surrounding the source, and therefore with
    the ionizing luminosity and age of the source. Motivated by the recent discovery
    of a Lyα-emitting galaxy at a redshift z = 6.56 (Hu et al.), possibly prior to
    the reionization of the IGM, we revisit the effects of a neutral IGM on the Lyα
    emission line. We show that for faint sources with little or even no ionizing
    continuum, a sufficiently broad (Δv ≳ 300 km s^-1) emission line can still remain
    observable. In particular, the line detected by Hu et al. is consistent with a
    source embedded in a neutral IGM. We provide characterizations of the asymmetry
    and total transmitted flux of the Lyα line as functions of the ionizing emissivity
    of its source. We argue that a statistical sample of Lyα emitters extending beyond
    the reionization redshift can be a useful probe of reionization.
article_processing_charge: No
article_type: original
author:
- first_name: Zoltán
  full_name: Haiman, Zoltán
  id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
  last_name: Haiman
citation:
  ama: Haiman Z. The detectability of high-redshift Lyα emission lines prior to the
    reionization of the universe. <i>The Astrophysical Journal</i>. 2002;576(1):L1-L4.
    doi:<a href="https://doi.org/10.1086/343101">10.1086/343101</a>
  apa: Haiman, Z. (2002). The detectability of high-redshift Lyα emission lines prior
    to the reionization of the universe. <i>The Astrophysical Journal</i>. American
    Astronomical Society. <a href="https://doi.org/10.1086/343101">https://doi.org/10.1086/343101</a>
  chicago: Haiman, Zoltán. “The Detectability of High-Redshift Lyα Emission Lines
    Prior to the Reionization of the Universe.” <i>The Astrophysical Journal</i>.
    American Astronomical Society, 2002. <a href="https://doi.org/10.1086/343101">https://doi.org/10.1086/343101</a>.
  ieee: Z. Haiman, “The detectability of high-redshift Lyα emission lines prior to
    the reionization of the universe,” <i>The Astrophysical Journal</i>, vol. 576,
    no. 1. American Astronomical Society, pp. L1–L4, 2002.
  ista: Haiman Z. 2002. The detectability of high-redshift Lyα emission lines prior
    to the reionization of the universe. The Astrophysical Journal. 576(1), L1–L4.
  mla: Haiman, Zoltán. “The Detectability of High-Redshift Lyα Emission Lines Prior
    to the Reionization of the Universe.” <i>The Astrophysical Journal</i>, vol. 576,
    no. 1, American Astronomical Society, 2002, pp. L1–4, doi:<a href="https://doi.org/10.1086/343101">10.1086/343101</a>.
  short: Z. Haiman, The Astrophysical Journal 576 (2002) L1–L4.
date_created: 2024-09-06T09:34:46Z
date_published: 2002-07-31T00:00:00Z
date_updated: 2024-09-26T14:51:17Z
day: '31'
doi: 10.1086/343101
extern: '1'
intvolume: '       576'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1086/343101
month: '07'
oa: 1
oa_version: Published Version
page: L1-L4
publication: The Astrophysical Journal
publication_identifier:
  issn:
  - 0004-637X
  - 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: The detectability of high-redshift Lyα emission lines prior to the reionization
  of the universe
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 576
year: '2002'
...