{"doi":"10.1023/a:1017062512507","volume":269,"quality_controlled":"1","article_processing_charge":"No","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","language":[{"iso":"eng"}],"OA_type":"closed access","publication":"Astrophysics and Space Science","page":"191-199","publication_status":"published","article_type":"original","month":"12","type":"journal_article","day":"01","scopus_import":"1","abstract":[{"text":"In hierarchical models of structure formation, an early cosmic UV background(UVB) is produced by the small (T vir ≲ 104K) halos that collapse before cosmological reionization. If the sources in the first collapsed halos are stars, then their UV flux below 13.6 eV photo-dissociates the molecular hydrogen H2 in subsequently collapsing halos and causes a pause in the cosmic star-formation history. The buildup of the UVB, and reionization is delayed until larger halos (T vir ≳ 104K) collapse. In contrast, if the small halos host mini-quasars with hard spectra extending to∼1keV, then their X-rays balance the effects of the UVB, the negative feedback does not occur, and reionization can be caused early on by the small halos.","lang":"eng"}],"extern":"1","title":"Radiative feedback from the first objects and the end of the cosmological dark age","oa_version":"None","author":[{"full_name":"Haiman, Zoltán","id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","orcid":"0000-0003-3633-5403","last_name":"Haiman","first_name":"Zoltán"}],"status":"public","publisher":"Springer Nature","year":"1999","date_published":"1999-12-01T00:00:00Z","date_updated":"2025-01-03T12:08:38Z","publication_identifier":{"issn":["0004-640X"],"eissn":["1572-946X"]},"_id":"18725","date_created":"2025-01-03T12:07:53Z","intvolume":"       269","citation":{"mla":"Haiman, Zoltán. “Radiative Feedback from the First Objects and the End of the Cosmological Dark Age.” <i>Astrophysics and Space Science</i>, vol. 269, Springer Nature, 1999, pp. 191–99, doi:<a href=\"https://doi.org/10.1023/a:1017062512507\">10.1023/a:1017062512507</a>.","chicago":"Haiman, Zoltán. “Radiative Feedback from the First Objects and the End of the Cosmological Dark Age.” <i>Astrophysics and Space Science</i>. Springer Nature, 1999. <a href=\"https://doi.org/10.1023/a:1017062512507\">https://doi.org/10.1023/a:1017062512507</a>.","short":"Z. Haiman, Astrophysics and Space Science 269 (1999) 191–199.","ieee":"Z. Haiman, “Radiative feedback from the first objects and the end of the cosmological dark age,” <i>Astrophysics and Space Science</i>, vol. 269. Springer Nature, pp. 191–199, 1999.","apa":"Haiman, Z. (1999). Radiative feedback from the first objects and the end of the cosmological dark age. <i>Astrophysics and Space Science</i>. Springer Nature. <a href=\"https://doi.org/10.1023/a:1017062512507\">https://doi.org/10.1023/a:1017062512507</a>","ista":"Haiman Z. 1999. Radiative feedback from the first objects and the end of the cosmological dark age. Astrophysics and Space Science. 269, 191–199.","ama":"Haiman Z. Radiative feedback from the first objects and the end of the cosmological dark age. <i>Astrophysics and Space Science</i>. 1999;269:191-199. doi:<a href=\"https://doi.org/10.1023/a:1017062512507\">10.1023/a:1017062512507</a>"}}