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    A WISE Survey of Circumstellar Disks in the Upper Scorpius Association

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    Esplin_2018_AJ_156_75.pdf
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    Final Published version
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    Author
    Esplin, T. L.
    Luhman, K. L.
    Miller, E. B.
    Mamajek, E. E.
    Affiliation
    Univ Arizona, Steward Observ
    Issue Date
    2018-08
    Keywords
    accretion, accretion disks
    brown dwarfs
    protoplanetary disks
    stars: formation
    stars: low-mass
    stars: pre-main sequence
    
    Metadata
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    Publisher
    IOP PUBLISHING LTD
    Citation
    T. L. Esplin et al 2018 AJ 156 75
    Journal
    ASTRONOMICAL JOURNAL
    Rights
    © 2018. 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 have performed a survey for new members of the Upper Sco association that have circumstellar disks using mid-infrared photometry from the Wide-field Infrared Survey Explorer (WISE). Through optical and near-infrared spectroscopy, we have confirmed 185 candidates as likely members of Upper Sco with spectral types ranging from mid-K to M9. They comprise similar to 36% of the known disk-bearing members of the association. We also have compiled all available mid-infrared photometry from WISE and the Spitzer Space Telescope for the known members of Upper Sco, resulting in a catalog of data for 1608 objects. We have used these data to identify the members that exhibit excess emission from disks and we have classified the evolutionary stages of those disks with criteria similar to those applied in our previous studies of Taurus and Upper Sco. Among 484 members with excesses in at least one band (excluding five Be stars), we classify 296 disks as full, 66 as evolved, 19 as transitional, 22 as evolved or transitional, and 81 as evolved transitional or debris. Many of these disks have not been previously reported, including 129 full disks and 50 disks that are at more advanced evolutionary stages.
    ISSN
    1538-3881
    DOI
    10.3847/1538-3881/aacce0
    Version
    Final published version
    Sponsors
    NASA Astrophysics Data Analysis Program [NNX12AI58G]; NASA NExSS program; NASA [NNH14CK55B]; NSF; U.S. Government [NAG W-2166]; Pennsylvania State University; Eberly College of Science; Pennsylvania Space Grant Consortium
    Additional Links
    http://stacks.iop.org/1538-3881/156/i=2/a=75?key=crossref.6b2ef69cfd9f4a5f04d36010186095ac
    ae974a485f413a2113503eed53cd6c53
    10.3847/1538-3881/aacce0
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    UA Faculty Publications

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