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    Double-peaked [OI] Profile: A Likely Signature of the Gaseous Ring around KH 15D

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    Fang_2019_ApJL_879_L10.pdf
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    Author
    Fang, Min cc
    Pascucci, Ilaria cc
    Kim, Jinyoung Serena cc
    Edwards, Suzan
    Affiliation
    Univ Arizona, Dept Astron
    Univ Arizona, Dept Planetary Sci
    Issue Date
    2019-07-01
    Keywords
    open clusters and associations: individual (NGC 2264)
    protoplanetary disks
    stars: individual (KH 15D)
    stars: pre-main sequence
    
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    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    Min Fang et al 2019 ApJL 879 L10
    Journal
    ASTROPHYSICAL JOURNAL LETTERS
    Rights
    Copyright © 2019. 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
    KH 15D is a well-known spectroscopic binary because of its unique and dramatic photometric variability. The variability is explained by a circumbinary dust ring, but the ring itself was never directly detected. We present a new interpretation of the double-peaked [OI]lambda 6300 profiles as originating from the hot disk surface of KH 15D. By modeling these profiles, we measure emitting radii between similar to 0.5 and 5 au, basically a gaseous ring very similar in radial extent to the dust ring inferred from modeling the system's photometric variability. We also discuss the possibility that external photoevaporation driven by ultraviolet photons from the nearby massive star HD 47887 has truncated the outer edge of the disk to the observed value.
    ISSN
    2041-8205
    DOI
    10.3847/2041-8213/ab288d
    Version
    Final published version
    Sponsors
    Collaborative NSF Astronomy & Astrophysics Research Grant [1715022, 1714229]; National Aeronautics and Space Administration [NNX15AD94G]; NASA's Science Mission Directorate
    ae974a485f413a2113503eed53cd6c53
    10.3847/2041-8213/ab288d
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