A Keplerian disk around the Herbig Ae star HD 169142

A. Raman, M. Lisanti, D. J. Wilner, C. Qi, M. Hogrrheijde

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We present Submillimeter Array observations of the Herbig Ae star HD 169142 in 1.3 mm continuum emission and 12CO J = 2-1 line emission at ∼l.″5 resolution that reveal a circumstellar disk. The continuum emission is centered on the star position and resolved, and it provides a mass estimate of ∼0.02 M⊙, for the disk. The CO images show patterns in position and velocity that are well matched by a disk in Keplerian rotation with low inclination to the line of sight. We use radiative transfer calculations based on a flared, passive disk model to constrain the disk parameters by comparison to the spectral line emission. The derived disk radius is 235 AU, and the inclination is 13°. The model also necessitates modest depletion of the CO molecules, similar to that found in Keplerian disks around T Tauri stars.

Original languageEnglish (US)
Pages (from-to)2290-2293
Number of pages4
JournalAstronomical Journal
Issue number4
StatePublished - Apr 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Planetary systems: protoplanetary disks
  • Stars: individual (HD 169142)
  • Stars: pre-main-sequence


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