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American Astronomical Society, Astronomical Journal, 4(131), p. 2290-2293, 2006

DOI: 10.1086/500587

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A Keplerian disk around the Herbig Ae star HD 169142

Journal article published in 2006 by A. Raman ORCID, M. Lisanti ORCID, D. J. Wilner, C. Qi, and M. Hogerheijde
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

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 ~15 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.