{"issue":"1","date_updated":"2024-11-13T07:17:10Z","page":"87-92","month":"07","abstract":[{"lang":"eng","text":"The early stage in the formation of a galaxy inevitably involves a spatially extended distribution of infalling, cold gas. If a central luminous quasar turned on during this phase, it would result in significant extended Lyα emission, possibly accompanied by other lines. For halos condensing at redshifts 3 ≲ z ≲ 8 and having virial temperatures 2 × 105 K ≲ Tvir ≲ 2 × 106 K, this emission results in a \"fuzz\" of characteristic angular diameter of a few arcseconds and surface brightness ~10-18 to 10-16 ergs s-1 cm-2 arcsec-2. The fuzz around bright, high-redshift quasars could be detected in deep narrowband imaging with current telescopes, providing a direct constraint on galaxy formation models. The absence of detectable fuzz might suggest that most of the protogalaxy's gas settles to a self-gravitating disk before a quasar turns on. However, continued gas infall from large radii, or an on-going merger spreading cold gas over a large solid angle, during the luminous quasar phase could also result in extended Lyα emission, and can be constrained by deep narrowband imaging."}],"title":"Extended Lyα emission around young quasars: A constraint on galaxy formation","day":"01","publication_status":"published","article_processing_charge":"No","date_created":"2024-09-06T12:09:20Z","publication_identifier":{"issn":["0004-637X"],"eissn":["1538-4357"]},"intvolume":"       556","oa":1,"OA_place":"repository","oa_version":"Preprint","publisher":"American Astronomical Society","main_file_link":[{"url":"https://doi.org/10.48550/arXiv.astro-ph/0101174","open_access":"1"}],"OA_type":"green","scopus_import":"1","author":[{"id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","first_name":"Zoltán","last_name":"Haiman","full_name":"Haiman, Zoltán","orcid":"0000-0003-3633-5403"},{"full_name":"Rees, Martin J.","last_name":"Rees","first_name":"Martin J."}],"citation":{"ista":"Haiman Z, Rees MJ. 2001. Extended Lyα emission around young quasars: A constraint on galaxy formation. The Astrophysical Journal. 556(1), 87–92.","mla":"Haiman, Zoltán, and Martin J. Rees. “Extended Lyα Emission around Young Quasars: A Constraint on Galaxy Formation.” <i>The Astrophysical Journal</i>, vol. 556, no. 1, American Astronomical Society, 2001, pp. 87–92, doi:<a href=\"https://doi.org/10.1086/321567\">10.1086/321567</a>.","ieee":"Z. Haiman and M. J. Rees, “Extended Lyα emission around young quasars: A constraint on galaxy formation,” <i>The Astrophysical Journal</i>, vol. 556, no. 1. American Astronomical Society, pp. 87–92, 2001.","short":"Z. Haiman, M.J. Rees, The Astrophysical Journal 556 (2001) 87–92.","apa":"Haiman, Z., &#38; Rees, M. J. (2001). Extended Lyα emission around young quasars: A constraint on galaxy formation. <i>The Astrophysical Journal</i>. American Astronomical Society. <a href=\"https://doi.org/10.1086/321567\">https://doi.org/10.1086/321567</a>","ama":"Haiman Z, Rees MJ. Extended Lyα emission around young quasars: A constraint on galaxy formation. <i>The Astrophysical Journal</i>. 2001;556(1):87-92. doi:<a href=\"https://doi.org/10.1086/321567\">10.1086/321567</a>","chicago":"Haiman, Zoltán, and Martin J. Rees. “Extended Lyα Emission around Young Quasars: A Constraint on Galaxy Formation.” <i>The Astrophysical Journal</i>. American Astronomical Society, 2001. <a href=\"https://doi.org/10.1086/321567\">https://doi.org/10.1086/321567</a>."},"quality_controlled":"1","status":"public","external_id":{"arxiv":["astro-ph/0101174"]},"article_type":"original","extern":"1","date_published":"2001-07-01T00:00:00Z","year":"2001","_id":"17829","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","doi":"10.1086/321567","arxiv":1,"type":"journal_article","publication":"The Astrophysical Journal","volume":556,"language":[{"iso":"eng"}]}