Dead Zone Accretion Flows in Protostellar Disks
نویسندگان
چکیده
منابع مشابه
Dust Evolution in Protostellar Accretion Disks
We calculated the collapse of a / r 2 density peaked, slowly rotating molecular cloud core by 2D numerical radiation hydrodynamical simulations. The dynamics of the dust grains is calculated applying a multicomponent uid model. Acceleration by the radiation eld, coupling to the gas component by dynamical friction, coagulation and shattering of the grains is included. Relative velocities between...
متن کاملEarly dust evolution in protostellar accretion disks
We investigate dust dynamics and evolution during the formation of a protostellar accretion disk around intermediate mass stars via 2D numerical simulations. Using three different detailed dust models, compact spherical particles, fractal BPCA grains, and BCCA grains, we find that even during the early collapse and the first ∼ 10 yr of dynamical disk evolution, the initial dust size distributio...
متن کاملRadiation Induced Warping of Protostellar Accretion Disks
We examine the consequences of radiatively driven warping of accretion disks surrounding pre-main-sequence stars. These disks are stable against warping if the luminosity arises from a steady accretion flow, but are unstable at late times when the intrinsic luminosity of the star overwhelms that provided by the disk. Warps can be excited for stars with luminosities of around 10L⊙ or greater, wi...
متن کاملThe radial structure of protostellar accretion disks: influence of jets
Context. The radial structure of accretion disks is a fundamental issue regarding star and planet formation. Many theoretical studies, focussing on different aspects such as e.g. disk emissivity or ionization, have been conducted in the context of the Standard Accretion Disk (SAD) model, where no jet is present. Aims. We wish to calculate the structure of YSO accretion disks in an approach that...
متن کاملLaminar Accretion in the Habitable Zone of Protoplanetary Disks
Protoplanetary disks (PPDs) are widely believed to be turbulent as a result of the magnetorotational instability (MRI). We perform magnetohydrodynamical simulations of PPDs that for the first time, take into account both Ohmic resistivity and ambipolar diffusion in a self-consistent manner. We show that in the inner region of PPDs that corresponds the habitable zone, the MRI is completely suppr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2008
ISSN: 0004-637X,1538-4357
DOI: 10.1086/589540