• Login
    View Item 
    •   Home
    • UA Faculty Research
    • UA Faculty Publications
    • View Item
    •   Home
    • UA Faculty Research
    • UA Faculty Publications
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    The role of galaxies and AGN in reionizing the IGM – I. Keck spectroscopy of 5 < z < 7 galaxies in the QSO field J1148+5251

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    sty1318.pdf
    Size:
    3.336Mb
    Format:
    PDF
    Description:
    Final Published version
    Download
    Author
    Kakiichi, Koki
    Ellis, Richard S
    Laporte, Nicolas cc
    Zitrin, A. cc
    Eilers, Anna-Christina
    Ryan-Weber, Emma
    Meyer, Romain A
    Robertson, Brant
    Stark, Daniel P
    Bosman, Sarah E I
    Affiliation
    Univ Arizona, Steward Observ
    Issue Date
    2018-09
    Keywords
    galaxies: formation
    galaxies: high-redshift
    intergalactic medium
    quasars: absorption lines
    cosmology: observations dark ages, reionization, first stars
    
    Metadata
    Show full item record
    Publisher
    OXFORD UNIV PRESS
    Citation
    Koki Kakiichi, Richard S Ellis, Nicolas Laporte, Adi Zitrin, Anna-Christina Eilers, Emma Ryan-Weber, Romain A Meyer, Brant Robertson, Daniel P Stark, Sarah E I Bosman; The role of galaxies and AGN in reionizing the IGM – I. Keck spectroscopy of 5 < z < 7 galaxies in the QSO field J1148+5251, Monthly Notices of the Royal Astronomical Society, Volume 479, Issue 1, 1 September 2018, Pages 43–63, https://doi.org/10.1093/mnras/sty1318
    Journal
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
    Rights
    © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.
    Collection Information
    This 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.
    Abstract
    We introduce a new method for determining the influence of galaxies and active galactic nuclei (AGN) on the intergalactic medium (IGM) at high redshift and illustrate its potential via a first application to the field of the z = 6.42 QSO J1148+5251. Correlating spatial positions Lyman break galaxies (LBGs) with the Lyman alpha forest seen in the spectrum of a background QSO, we provide a statistical measure of the typical escape fraction of Lyman continuum photons. Using Keck DEIMOS spectroscopy to locate seven colour-selected LBGs in the range 5,3 less than or similar to z less than or similar to 6.4 we examine the spatial correlation between this sample and Ly alpha/Ly beta transmission fluctuations in a Keck ESI spectrum of the QSO. Interpreting the statistical II I proximity effect as arising from faint galaxies clustered around the LBGs, we translate the observed mean Lyra, transmitted flux into a constraint on the mean escape fraction < f(esc)> >= 0.08 at z similar or equal to 6. We also report individual transverse II I proximity effect for a z = 6.177 luminous LBG via a Ly beta transmission spike and two broad Ly alpha transmission spikes around the z = 5.701 AGN. We discuss the origin of such associations which suggest that while faint galaxies are primarily driving reionization, luminous galaxies and AGN may provide important contributions to the UV background or thermal fluctuations of the IGM at z similar or equal to 6. Although a limited sample, our results demonstrate the potential of making progress using this method in resolving one of the most challenging aspects of the contribution of galaxies and AGN to cosmic reionization.
    ISSN
    0035-8711
    1365-2966
    DOI
    10.1093/mnras/sty1318
    Version
    Final published version
    Sponsors
    European Research Council [FP7/669253]; National Science Foundation [AST-1410155]; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) [CE170100013]; W. M. Keck Foundation; NASA [NNG16PJ25C, 17-ATP17-0034, HST-GO-14747]
    Additional Links
    https://academic.oup.com/mnras/article/479/1/43/4999925
    ae974a485f413a2113503eed53cd6c53
    10.1093/mnras/sty1318
    Scopus Count
    Collections
    UA Faculty Publications

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.