Accretion Disk Boundary Layers: Their Structure and Stability

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Accretion disk boundary layers in classical TTauri stars

The dynamical and thermal structure of an opaque boundary layer, connecting a classical T Tauri star (CTTS: M∗ = 1M , R∗ = 4.3R , Teff = 5000K) with its accretion disk (Ṁ = 10−7M /yr), has been computed, including particularly the effect of a turbulence-driven global heat transport. The inner boundary has been shifted deeper and deeper into the star’s envelope in order to determine how this aff...

متن کامل

Boundary Layers and Heat Transfer on a Rotating Rough Disk

The study of flow and heat transfer over rotating circular disks is of great practical importance in understanding the cooling of rotatory machinery such as turbines, electric motors and design and manufacturing of computer disk drives. This paper presents an analysis of the flow and heat transfer over a heated infinite permeable rough disk. Boundary-layer approximation reduces the elliptic Nav...

متن کامل

Interface Modes and Their Instabilities in Accretion Disc Boundary Layers

We study global non-axisymmetric oscillation modes trapped near the inner boundary of an accretion disc. Observations indicate that some of the quasi-periodic oscillations (QPOs) observed in the luminosities of accreting compact objects (neutron stars, black holes and white dwarfs) are produced in the inner-most regions of accretion discs or boundary layers. Two simple models are considered in ...

متن کامل

Neutrino Cooled Accretion Disk and Its Stability

We investigate the structure and stability of hypercritical accretion flows around stellar-mass black holes, taking into account neutrino cooling, lepton conservation, and firstly a realistic equation of state in order to properly treat the dissociation of nuclei. We obtain the radial distributions of physical properties, such as density, temperature and electron fraction, for various mass accr...

متن کامل

Magnetic activity in accretion disc boundary layers

We use three dimensional magnetohydrodynamic simulations to study the structure of the boundary layer between an accretion disc and a non-rotating, unmagnetized star. Under the assumption that cooling is efficient, we obtain a narrow but highly variable transition region in which the radial velocity is only a small fraction of the sound speed. A large fraction of the energy dissipation occurs i...

متن کامل

ذخیره 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: International Astronomical Union Colloquium

سال: 1987

ISSN: 0252-9211

DOI: 10.1017/s0252921100105020