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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Final Published Version
Affiliation
Univ Arizona, Dept AstronUniv Arizona, Dept Planetary Sci
Issue Date
2019-07-01Keywords
open clusters and associations: individual (NGC 2264)protoplanetary disks
stars: individual (KH 15D)
stars: pre-main sequence
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IOP PUBLISHING LTDCitation
Min Fang et al 2019 ApJL 879 L10Journal
ASTROPHYSICAL JOURNAL LETTERSRights
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
2041-8205Version
Final published versionSponsors
Collaborative NSF Astronomy & Astrophysics Research Grant [1715022, 1714229]; National Aeronautics and Space Administration [NNX15AD94G]; NASA's Science Mission Directorateae974a485f413a2113503eed53cd6c53
10.3847/2041-8213/ab288d