Double-peaked OI profile: a likely signature of the gaseous ring around KH 15D

Min Fang, Ilaria Pascucci, Jinyoung Serena Kim, Suzan Edwards

Research output: Contribution to journalArticlepeer-review


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 [O I] λ6300 profiles as originating from the hot disk surface of KH 15D. By modeling these profiles, we measure emitting radii between ∼0.5–5 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 UV photons from the nearby massive star HD 47887 has truncated the outer edge of the disk to the observed value.

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - Jun 11 2019


  • Open clusters and associations: individual (NGC 2264)
  • Protoplanetary disks
  • Stars: individual (KH 15D)
  • Stars: pre-main sequence

ASJC Scopus subject areas

  • General

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