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

1 Scopus citations

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 [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 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.

Original languageEnglish (US)
Article numberL10
JournalAstrophysical Journal Letters
Volume879
Issue number1
DOIs
StatePublished - Jul 1 2019

Keywords

  • open clusters and associations: individual (NGC 2264)
  • protoplanetary disks
  • stars: individual (KH 15D)
  • stars: pre-main sequence

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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