Magnetic Star-Disk Coupling in Classical T Tauri Systems

@article{Kker2003MagneticSC,
  title={Magnetic Star-Disk Coupling in Classical T Tauri Systems},
  author={Manfred K{\"u}ker and Th. Henning and G. R{\"u}diger},
  journal={The Astrophysical Journal},
  year={2003},
  volume={589},
  pages={397-409}
}
We study the interaction between a dipolar magnetic field rooted in the central star and the circumstellar accretion disk in a classical T Tauri system. The MHD equations, including radiative energy transport, are solved for an axisymmetric system with a resistive, turbulent gas. A Shakura-Sunyaev-type eddy viscosity and a corresponding eddy magnetic diffusivity are assumed for the disk. The computations cover the disk and its halo in a radial interval from 1.7 to 20 stellar radii. The initial… Expand
View via Publisher
aip.de
43 Citations
Highly Influential Citations
1
Background Citations
21
Methods Citations
9
Results Citations
1

Figures from this paper

43 Citations

Citation Type

Citation Type

Magnetic star-disk interaction in classical T Tauri systems
We simulate the impact of a dipolar stellar magnetic field rooted in a classical T Tauri star on the accretion disk and the halo above using a 2.5D finite difference code. The gas is assumed… Expand
Outflows and accretion in a star-disc system with stellar magnetosphere and disc dynamo
The interaction between a protostellar magnetosphere and a surrounding dynamo-active accretion disc is investigated using an axisymmetric mean-field model. In all models investigated, the… Expand
Formation of Protostellar Jets as Two-Component Outflows from Star-Disk Magnetospheres
Axisymmetric magnetohydrodynamic simulations have been applied to investigate (1) the interrelation between a central stellar magnetosphere and stellar wind with a surrounding magnetized disk… Expand
Spin Evolution of Accreting Young Stars. I. Effect of Magnetic Star-Disk Coupling
We present a model for the rotational evolution of a young, solar mass star interacting with an accretion disk. The model incorporates a description of the angular momentum transfer between the star… Expand
On the origin of jets from disc-accreting magnetized stars
A brief review of the origin of jets from disc-accreting rotating magnetized stars is given. In most models, the interior of the disc is characterized by a turbulent viscosity and magnetic… Expand
MHD simulations of accretion onto a dipolar magnetosphere - I. Accretion curtains and the disk-locking paradigm
Aims. We investigate the accretion process from an accretion disk onto a magnetized rotating star with a purely dipolar magnetic field. Our main aim is to study the mechanisms that regulate the… Expand
Magnetocentrifugally Driven Flows from Young Stars and Disks. VI. Accretion with a Multipole Stellar Field
Previous analyses of magnetospheric accretion and outflow in classical T Tauri stars (CTTSs), within the context of both the X-wind model and other theoretical scenarios, have assumed a dipolar… Expand
Large scale magnetic fields in viscous resistive accretion disks - I. Ejection from weakly magnetized disks
Aims. Cold steady-state disk wind theory from near Keplerian accretion disks requires a large scale magnetic field at near equipartition strength. However the minimum magnetization has never been… Expand
The spin of accreting stars: dependence on magnetic coupling to the disc
We formulate a general, steady-state model for the torque on a magnetized star from a surrounding accretion disc. For the first time, we include the opening of dipolar magnetic-field lines due to the… Expand
Magnetic torques on T Tauri stars: Accreting versus non-accreting systems
Context. Classical T Tauri stars (CTTs) magnetically interact with their surrounding disks, a process that is thought to regulate their rotational evolution.Aims. We compute torques acting on the… Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 32 REFERENCES
Disk accretion onto magnetic T Tauri stars
The dynamical and radiative consequences of disk accretion onto magnetic T Tauri stars (TTS) are examined using the Ghosh and Lamb model. It is shown that a prolonged disk accretion phase is… Expand
Simulation-based Investigation of a Model for the Interaction between Stellar Magnetospheres and Circumstellar Accretion Disks
We examine, parametrically, the interaction between the magnetosphere of a rotating young stellar object and a circumstellar accretion disk using 2.5-dimensional (cylindrically symmetric) numerical… Expand
Spin-up/spin-down of magnetized stars with accretion discs and outflows
An investigation is made of disk accretion of matter onto a rotating star with an aligned dipole magnetic field. A new aspect of this work is that when the angular velocity of the star and disk… Expand
Accretion by rotating magnetic neutron stars. II. Radial and vertical structure of the transition zone in disk accretion.
We invesgitage the interaction between the stellar magnetic field and the accreting plasma at the magnetospheric boundary of a neutron star accreting matter from a disk. The stellar magnetic field… Expand
Disk accretion by magnetic neutron stars.
A model for disk accretion by a rotating magnetic neutron star is proposed which includes a detailed description of matter flow in the transition region between the disk and the magnetosphere. It is… Expand
Magnetohydrodynamic Simulations of Stellar Magnetosphere-Accretion Disk Interaction
The magnetohydrodynamic evolution of the interaction region between the inner edge of an accretion disk and the magnetosphere of the central object is studied by means of time-dependent numerical… Expand
Magnetic braking of T Tauri stars
We construct models for the rotation rates of T Tauri stars whose spin is regulated by magnetic linkage between the star and a surrounding accretion disc. Our models utilise a time-dependent disc… Expand
Time-dependent Accretion by Magnetic Young Stellar Objects as a Launching Mechanism for Stellar Jets
A time-dependent jet launching and collimating mechanism is presented. Initial results of numerical simulations of the interaction between an aligned dipole rotator and a conducting circumstellar… Expand
Accretion by rotating magnetic neutron stars. III. Accretion torques and period changes in pulsating X-ray sources.
We use the solutions of the two-dimensional hydromagnetic equations obtained previously to calculate the torque on a magnetic neutron star accreting from a Keplerian disk. We find that the magnetic… Expand
Accretion disc-stellar magnetosphere interaction: field line inflation and the effect on the spin-down torque
We calculate the structure of a force-free magnetosphere which is assumed to corotate with a central star and which interacts with an embedded differentially rotating accretion disc. The magnetic and… Expand
...
1
2
3
4
...