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    Investigating Overdensities around z > 6 Galaxies through ALMA Observations of [C ii]

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    Miller_2020_ApJ_889_98.pdf
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    Author
    Miller, Tim B.
    Chapman, Scott C.
    Hayward, Christopher C.
    Behroozi, Peter S.
    Bradford, Matt
    Willott, Chris J.
    Wagg, Jeff
    Affiliation
    Univ Arizona, Dept Astron & Steward Observ
    Issue Date
    2020-01-29
    Keywords
    Quasar-galaxy pairs
    Reionization
    Submillimeter astronomy
    High-redshift galaxies
    Galaxies
    
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    Publisher
    IOP PUBLISHING LTD
    Citation
    Tim B. Miller et al 2020 ApJ 889 98
    Journal
    ASTROPHYSICAL JOURNAL
    Rights
    Copyright © 2020. The American Astronomical Society. All rights reserved.
    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 present a search for companion [C ii] emitters to known luminous sources at 6 < z < 6.5 in deep, archival ALMA observations. The observations are deep enough to detect sources with z similar to 6. We identify three new robust line detections from a blind search of five deep fields centered on ultraluminous infrared galaxies and QSOs. We calculate the volume density of companions and find a relative overdensity of 6(-3)(+4) when comparing to current observational constraints and theoretical predictions, respectively. These results suggest that the central sources may be highly biased tracers of mass in the early universe. We find these companion lines to have comparable properties to other known galaxies at the same epoch. All companions lie less than 650 km s(-1) and between 25 and 60 kpc (projected) from their central source. To place these discoveries in context, we employ a mock galaxy catalog to estimate the luminosity function for [C ii] during reionization and compare to our observations. The simulations support this result by showing a similar level of elevated counts found around such luminous [C ii] sources.
    ISSN
    0004-637X
    DOI
    10.3847/1538-4357/ab63dd
    Version
    Final published version
    ae974a485f413a2113503eed53cd6c53
    10.3847/1538-4357/ab63dd
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    UA Faculty Publications

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