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dc.contributor.authorFurlanetto, Steven R.
dc.contributor.authorLoeb, Abraham
dc.date.accessioned2019-09-24T12:04:31Z
dc.date.issued2002
dc.identifier.citationFurlanetto, Steven R., and Abraham Loeb. 2002. “The 21 Centimeter Forest: Radio Absorption Spectra as Probes of Minihalos before Reionization.” The Astrophysical Journal 579 (1): 1–9. https://doi.org/10.1086/342757.
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41393329*
dc.description.abstractWe study the absorption along lines of sight toward high-z radio sources caused by the 21 cm transition of neutral hydrogen in the intergalactic medium (IGM) before reionization. Using semianalytic methods, we compute the number density of observable features caused by both "minihalos" ( bound objects that are unable to cool efficiently because of their small virial temperatures) and protogalactic disks. We show that both sets of features should be observable by the next generation of low-frequency radio telescopes, including the Low Frequency Array and the Square Kilometer Array, provided that sufficiently bright background sources exist. The statistics of minihalo absorption features seen along lines of sight to radio-loud quasars offer a way to measure the evolution of the radiation background and the IGM temperature with cosmic time. Intersections with disks are much less common but cause significantly deeper absorption features that would be visible in the spectra of both radio-loud quasars and gamma-ray bursts (GRBs). The absorption feature caused by H I in the host galaxy of a GRB should be observable, offering a route to determine spectroscopically the burst redshift.
dc.language.isoen_US
dc.publisherAmerican Astronomical Society
dash.licenseLAA
dc.titleThe 21 Centimeter Forest: Radio Absorption Spectra as Probes of Minihalos before Reionization
dc.typeJournal Article
dc.description.versionAccepted Manuscript
dc.relation.journalThe Astrophysical Journal
dash.depositing.authorLoeb, Abraham::9975df1f269ab49c1ad5a328a1ec1476::600
dc.date.available2019-09-24T12:04:31Z
dash.workflow.comments1Science Serial ID 96331
dc.identifier.doi10.1086/342757
dash.source.volume579;1
dash.source.page1-9


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