Double-peaked [OI] Profile: A Likely Signature of the Gaseous Ring around KH 15D
AffiliationUniv Arizona, Dept Astron
Univ Arizona, Dept Planetary Sci
Keywordsopen clusters and associations: individual (NGC 2264)
stars: individual (KH 15D)
stars: pre-main sequence
MetadataShow full item record
PublisherIOP PUBLISHING LTD
CitationMin Fang et al 2019 ApJL 879 L10
JournalASTROPHYSICAL JOURNAL LETTERS
RightsCopyright © 2019. The American Astronomical Society. All rights reserved.
Collection InformationThis 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 firstname.lastname@example.org.
AbstractKH 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.
VersionFinal published version
SponsorsCollaborative NSF Astronomy & Astrophysics Research Grant [1715022, 1714229]; National Aeronautics and Space Administration [NNX15AD94G]; NASA's Science Mission Directorate