The vertical structure of T Tauri accretion disks II. Physical conditions in the disk

Abstract

We present a self-consistent analytical model for the computation of the physical conditions in a steady quasi-Keplerian accretion disk. The method, based on the thin disk approximation, considers the disk as concentric cylinders in which we treat the vertical transfer as in a plane-parallel medium. The formalism generalizes a work by Hubeny (1990), linking the disk temperature distribution to the local energy dissipation and leads to analytical formulae for the temperature distribution which help to understand the behaviour of the radiation propagated inside the disks. One of the main features of our new model is that it can take into account many heating sources. We apply the method first to two sources: viscous dissipation and stellar irradiation. We show that other heating sources like horizontal transfer or irradiation from the ambiant medium can also be taken into account. Using the analytical formulation in the case of a modified Shakura & Sunyaev radial distribution that allow the accretion rate to be partly self-similar in the inner region, and, for an alpha and beta prescription of the viscosity, we obtain two-dimensional maps of the temperature, pressure and density in the close environment of low mass young stars. We use these maps to derive the observational properties of the disks such as spectral energy distributions, high resolution spatial images or visibilities in order to underline their different behaviours under different input models.

arXiv commentlatex2e with AMS macros, 14 pages, 10 figures

References in corpus (8)

• Spectral Energy Distributions of T Tauri Stars With Passive Circumstellar Disks
• Using FU Orionis Outbursts to Constrain Self-Regulated Protostellar Disk Models
• Accretion Disks around Young Objects. I. The Detailed Vertical Structure
• Accretion Disks Around Young Objects. II. Tests of Well-Mixed Models with Ism Dust
• On the tidal interaction of a solar-type star with an orbiting companion: Excitation of g mode oscillation and orbital evolution
• Spectral Energy Distributions of Passive T Tauri Disks: Inclination
• Accretion discs models with the "beta"-viscosity prescription derived from laboratory experiments
• The response of accretion disks to bending waves: angular momentum transport and resonances

Cited by in corpus (20)

• Flaring vs. self-shadowed disks: the SEDs of Herbig Ae/Be stars
• Radiation thermo-chemical models of protoplanetary disks I. Hydrostatic disk structure and inner rim
• Probing the structure of protoplanetary disks: a comparative study of DM Tau, LkCa 15 and MWC 480
• Vertical structure models of T Tauri and Herbig Ae/Be disks
• Few Skewed Disks Found in First Closure-Phase Survey of Herbig Ae/Be stars
• Strong near-infrared emission in the sub-AU disk of the Herbig Ae star HD163296: evidence for refractory dust?
• Protoplanetary Disk Structure With Grain Evolution: the ANDES Model
• Observations of Solids in Protoplanetary Disks
• Efficient radiative transfer in dust grain mixtures
• Magnetic Coupling in the Disks Around Young Gas Giant Planets
• A layered edge-on circumstellar disk around HK Tau B
• Bright Localized Near-Infrared Emission at 1-4 AU in the AB Aurigae Disk Revealed by IOTA Closure Phases
• Interaction of young stellar object jets with their accretion disk
• The vertical structure of T Tauri accretion discs III. Consistent interpretation of spectra and visibilities with a two-layer model
• Magnetically driven outflows from Jovian circum-planetaryaccretion disks
• Gap opening beyond dead zones by photoevaporation
• The effect of scattering on the structure and SED of protoplanetary disks
• An analysis of two-layer models for circumstellar disks
• The vertical structure of T Tauri accretion discs IV. Self-irradiation of the disc in the FU Orionis outburst phase
• Speckle interferometry of the HAeBe star V376 Cas