Accretion Disks around Young Objects. III. Grain Growth

2001/01/25 by Paola D’Alessio, Paola D'Alessio, Nuria Calvet +1 · 33 citations
Physics and Astronomy · #Accretion (finance) #Accretion disc #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Astrophysics and Star Formation Studies #Cosmic dust #Grain growth #Grain size #Interstellar medium #Irradiation #Radiation #T Tauri star #astro-ph

paper · pdf · doi:10.1086/320655

published as Astrophys.J.553:321-334,2001 · 29 pages, including 11 figures and 1 table, APJ accepted

arxiv created 2001/01/25 · openalex publication_date 2001/05/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We present detailed models of irradiated T Tauri disks including dust grain growth with power-law size distributions. The models assume complete mixing between dust and gas and solve for the vertical disk structure self-consistently including the heating effects of stellar irradiation as well as local viscous heating. For a given total dust mass, grain growth is found to decrease the vertical height of the surface where the optical depth to the stellar radiation becomes unity and thus the local irradiation heating, while increasing the disk emission at mm and submillimeter wavelengths. The resulting disk models are less geometrically thick than our previous models assuming interstellar medium dust, and agree better with observed spectral energy distributions and images of edge-on disks, like HK Tau/c and HH 30. The implications of models with grain growth for determining disk masses from long-wavelength emission are considered.

Citations

• Dynamics of Circumstellar Disks. II. Heating and Cooling

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