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    The Big Sibling of AU Mic: A Cold Dust-rich Debris Disk around CP−72 2713 in the β Pic Moving Group

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    Moór_2020_AJ_159_288.pdf
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    Author
    Moór, Attila
    Pawellek, Nicole
    Ábrahám, Péter
    Kóspál, Ágnes
    Vida, Krisztián cc
    Pál, András cc
    Dutrey, Anne
    Folco, Emmanuel Di
    Hughes, A. Meredith
    Kral, Quentin
    Pascucci, Ilaria cc
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    Affiliation
    Univ Arizona, Lunar & Planetary Lab
    Issue Date
    2020-06-02
    Keywords
    Circumstellar disks
    Debris disks
    Late-type dwarf stars
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    Attila Moór et al 2020 AJ 159 288
    Journal
    ASTRONOMICAL 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
    Analyzing Spitzer and Herschel archival measurements we identified a debris disk around the young K7/M0 star CP-72 2713. The system belongs to the 24 Myr old beta Pic moving group. Our new 1.33 mm continuum observation, obtained with the Atacama Large Millimeter/submillimeter Array 7 m array, revealed an extended dust disk with a peak radius of 140 au, probably tracing the location of the planetesimal belt in the system. The disk is outstandingly large compared to known spatially resolved debris disks and protoplanetary disks around stars of comparable masses. The dynamical excitation of the belt at this radius is found to be reconcilable with planetary stirring, while self-stirring by large planetesimals embedded in the belt can work only if these bodies form very rapidly, e.g., via pebble concentration. By analyzing the spectral energy distribution, we derived a characteristic dust temperature of 43 K and a fractional luminosity of 1.1 x 10(-3). The latter value is prominently high; we know of only four other similarly dust-rich Kuiper Belt analogs within 40 pc of the Sun.
    ISSN
    0004-6256
    DOI
    10.3847/1538-3881/ab8f98
    Version
    Final published version
    ae974a485f413a2113503eed53cd6c53
    10.3847/1538-3881/ab8f98
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    UA Faculty Publications

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