Discovery of a candidate protoplanetary disk around the embedded source IRc9 in Orion

Nathan Smith, John Bally

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


We report the detection of spatially extended mid-infrared emission around the luminous embedded star IRc9 in OMC-1, as seen in 8.8, 11.7, and 18.3 μm images obtained with the Thermal-Region Camera and Spectrograph on Gemini South. The extended emission is asymmetric, and the morphology is reminiscent of warm dust disks around other young stars. The putative disk has a radius of roughly 1′.5 (700 AU) and a likely dust mass of almost 10 Moplus;. The infrared spectral energy distribution of IRc9 indicates a total luminosity of ∼100 Loplus;, implying that it will become an early A-type star when it reaches the main sequence. Thus, the candidate disk around IRc9 may be a young analog of the planetary debris disks around Vega-like stars and the disks of Herbig Ae stars, and may provide a laboratory in which to study the earliest phases of planet formation. A disk around IRc9 may also add weight to the hypothesis that an enhanced T Tauri-like wind from this star has influenced the molecular outflow from the OMC-1 core.

Original languageEnglish (US)
Pages (from-to)L65-L68
JournalAstrophysical Journal
Issue number1 II
StatePublished - Mar 20 2005


  • Planetary systems: protoplanetary disks
  • Stars: formation
  • Stars: pre-main-sequence

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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