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dc.contributor.authorYung, L Y Aaron
dc.contributor.authorSomerville, Rachel S
dc.contributor.authorFinkelstein, Steven L
dc.contributor.authorPopping, Gergö
dc.contributor.authorDavé, Romeel
dc.contributor.authorVenkatesan, Aparna
dc.contributor.authorBehroozi, Peter
dc.contributor.authorFerguson, Harry C
dc.date.accessioned2021-04-17T00:54:09Z
dc.date.available2021-04-17T00:54:09Z
dc.date.issued2020-06-20
dc.identifier.citationYung, L. A., Somerville, R. S., Finkelstein, S. L., Popping, G., Davé, R., Venkatesan, A., ... & Ferguson, H. C. (2020). Semi-analytic forecasts for JWST–IV. Implications for cosmic reionization and LyC escape fraction. Monthly Notices of the Royal Astronomical Society, 496(4), 4574-4592.en_US
dc.identifier.issn0035-8711
dc.identifier.doi10.1093/mnras/staa1800
dc.identifier.urihttp://hdl.handle.net/10150/657786
dc.description.abstractGalaxies forming in low-mass haloes are thought to be primarily responsible for reionizing the Universe during the first billion years after the big bang. Yet, these haloes are extremely inefficient at forming stars in the nearby Universe. In thiswork, we address this apparent tension, and ask whether a physically motivated model of galaxy formation that reproduces the observed abundance of faint galaxies in the nearby Universe is also consistent with available observational constraints on the reionization history. By interfacing the Santa Cruz semi-analytic model for galaxy formation with an analytic reionization model, we constructed a computationally efficient pipeline that connects 'ground-level' galaxy formation physics to 'top-level' cosmological-scale observables. Based on photometric properties of the galaxy populations predicted up to z = 15, we compute the reionization history of intergalactic hydrogen. We quantify the three degenerate quantities that influence the total ionizing photon budget, including the abundance of galaxies, the intrinsic production rate of ionizing photons, and the LyC escape fraction. We explore covariances between these quantities using a Markov chain Monte Carlo method. We find that our locally calibrated model is consistent with all currently available constraints on the reionization history, under reasonable assumptions about the LyC escape fraction. We quantify the fraction of ionizing photons produced by galaxies of different luminosities and find that the galaxies expected to be detected in James Webb Space Telescope Near-Infrared Camera (NIRCam) wide and deep surveys are responsible for producing similar to 40-80 per cent of ionizing photons throughout the Epoch of Reionization. All results presented in this work are available at https://www.simonsfoundation.org/semi-analytic-forecasts-for-jwst/.en_US
dc.language.isoenen_US
dc.publisherOXFORD UNIV PRESSen_US
dc.rights© 2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectgalaxies: evolutionen_US
dc.subjectgalaxies: formationen_US
dc.subjectgalaxies: high-redshiftsen_US
dc.subjectgalaxies: star formationen_US
dc.subjectdark ages, reionization, first starsen_US
dc.subjectcosmology: theoryen_US
dc.titleSemi-analytic forecasts for JWST – IV. Implications for cosmic reionization and LyC escape fractionen_US
dc.typeArticleen_US
dc.identifier.eissn1365-2966
dc.contributor.departmentUniv Arizona, Steward Observen_US
dc.identifier.journalMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETYen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleMonthly Notices of the Royal Astronomical Society
dc.source.volume496
dc.source.issue4
dc.source.beginpage4574
dc.source.endpage4592
refterms.dateFOA2021-04-17T00:54:10Z


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