A CANDIDATE PLANETARY-MASS OBJECT with A PHOTOEVAPORATING DISK in ORION

Min Fang, Jinyoung Serena Kim, Ilaria Pascucci, Dániel Apai, Carlo Felice Manara

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

In this work, we report the discovery of a candidate planetary-mass object with a photoevaporating protoplanetary disk, Proplyd 133-353, which is near the massive star θ 1 Ori C at the center of the Orion Nebula Cluster (ONC). The object was known to have extended emission pointing away from θ 1 OriC, indicating ongoing external photoevaporation. Our near-infrared spectroscopic data and the location on the H-R diagram suggest that the central source of Proplyd 133-353 is substellar (∼M9.5) and has a mass probably less than 13 Jupiter mass and an age younger than 0.5 Myr. Proplyd 133-353 shows a similar ratio of X-ray luminosity to stellar luminosity to other young stars in the ONC with a similar stellar luminosity and has a similar proper motion to the mean one of confirmed ONC members. We propose that Proplyd 133-353 formed in a very low-mass dusty cloud or an evaporating gas globule near θ 1 Ori C as a second generation of star formation, which can explain both its young age and the presence of its disk.

Original languageEnglish (US)
Article numberL16
JournalAstrophysical Journal Letters
Volume833
Issue number2
DOIs
StatePublished - Dec 20 2016

Keywords

  • brown dwarfs
  • circumstellar matter
  • stars: pre-main sequence

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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