{"title":"The detectability of high-redshift Lyα emission lines prior to the reionization of the universe","date_published":"2002-07-31T00:00:00Z","article_processing_charge":"No","volume":576,"month":"07","quality_controlled":"1","date_updated":"2024-09-26T14:51:17Z","publisher":"American Astronomical Society","main_file_link":[{"url":"https://doi.org/10.1086/343101","open_access":"1"}],"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."}],"citation":{"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>.","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>","short":"Z. Haiman, The Astrophysical Journal 576 (2002) L1–L4.","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>.","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.","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>"},"scopus_import":"1","oa_version":"Published Version","type":"journal_article","publication_identifier":{"issn":["0004-637X","1538-4357"]},"status":"public","date_created":"2024-09-06T09:34:46Z","article_type":"original","year":"2002","publication_status":"published","extern":"1","oa":1,"doi":"10.1086/343101","intvolume":"       576","language":[{"iso":"eng"}],"author":[{"full_name":"Haiman, Zoltán","id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","last_name":"Haiman","first_name":"Zoltán"}],"page":"L1-L4","_id":"17746","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","issue":"1","publication":"The Astrophysical Journal","day":"31"}