2006/07/11 by Murad Hamidouche, Leslie W. Looney, Lee G. Mundy · 4 citations
Physics and Astronomy · #Astro and Planetary Science #Astrophysics and Star Formation Studies #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/507693
published as Astrophys.J.651:321-327,2006 · ApJ Accepted. 17 pages
arxiv created 2006/07/11 · openalex publication_date 2006/10/27 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
We present high-resolution 0 45 × 0 32 observations from the BIMA array toward the Herbig Ae system MWC 480 in the λ = 1.4 mm dust continuum. We resolve a circumstellar disk of radius ~170 AU and constrain the disk parameters by comparing the observations to flat-disk models. These results show that the typical fit parameters of the disk, such as the mass, M D ~ 0.04-0.18 M ☉ , and the surface density power-law index, p = 0.5 or 1, are comparable to those of the lower mass T Tauri stars. The dust in the MWC 480 disk can be modeled as processed dust material (β ≈ 0.8), similar to the Herbig Ae star CQ Tau disk; the fitted disk parameters are also consistent with less evolved dust (β ≈ 1.2). The possibility of grain growth in the MWC 480 circumstellar disk is supported by the acceptable fits with β ≈ 0.8. The surface density power-law profiles of p = 0.5 and p = 1 can be easily fitted to the MWC 480 disk; however, a surface density power-law profile similar to the minimum mass solar nebula model p = 1.5 is ruled out at an 80% confidence level.