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Rotating magnetized compact objects and their accretion discs can generate strong toroidal magnetic fields driving highly magnetized plasmas into relativistic jets. Of significant concern, however, has been that a strong toroidal field in…

Astrophysics · Physics 2009-11-13 Jonathan C. McKinney , Roger D. Blandford

We explore a new, efficient mechanism that can power toroidally magnetized jets up to two to three times their original terminal velocity after they enter a self-similar phase of magnetic acceleration. Underneath the elongated outflow lobe…

Solar and Stellar Astrophysics · Physics 2023-03-02 Hsien Shang , Ruben Krasnopolsky , Chun-Fan Liu

Astrophysical disks are likely embedded in an ambient vertical magnetic field. This ambient field is known to drive magneto-rotational turbulence in the disk bulk but is also responsible for the launching of magnetized outflows at the…

High Energy Astrophysical Phenomena · Physics 2021-03-31 J. Jacquemin-Ide , G. Lesur , J. Ferreira

Forming massive stars launch outflows of magnetic origin, which in fact serve as a marker for finding sites of massive star formation. However, both the theoretical and observational study of the mechanisms that intervene in the formation…

Solar and Stellar Astrophysics · Physics 2023-01-18 André Oliva , Rolf Kuiper

We investigate the launching and stability of extragalactic jets through nonlinear magnetohydrodynamic (MHD) simulation and linear eigenmode analysis. In the simulations of jet evolution, a small-scale equilibrium magnetic arcade is twisted…

High Energy Astrophysical Phenomena · Physics 2011-02-11 C. S. Carey , C. R. Sovinec

To model the interaction between the solar wind and the interstellar wind, magnetic fields must be included. Recently Opher et al. 2003 found that, by including the solar magnetic field in a 3D high resolution simulation using the…

We follow numerically the time evolution of axisymmetric outflows driven magneto-centrifugally from the inner portion of accretion disks, from their launching surface to large, observable distances. Special attention is paid to the…

Astrophysics · Physics 2009-11-10 Ruben Krasnopolsky , Zhi-Yun Li , Roger D. Blandford

We present the first-ever simulations of non-ideal magnetohydrodynamical (MHD) stellar magnetospheric winds coupled with disc-driven jets where the resistive and viscous accretion disc is self-consistently described. These innovative MHD…

Astrophysics · Physics 2011-02-19 Z. Meliani , F. Casse , C. Sauty

The interaction of jets in High-Mass X-ray Binaries (HMXBs) with the strong winds driven by the hot companion star in the vicinity of the compact object is fundamental to understand the jet dynamics, non-thermal emission and long-term…

High Energy Astrophysical Phenomena · Physics 2022-05-18 J. López-Miralles , M. Perucho , J. M. Martí , S. Migliari , V. Bosch-Ramon

3D-MHD numerical simulations of bipolar, hypersonic, weakly magnetized jets and synthetic synchrotron observations are presented to study the structure and evolution of magnetic fields in FR II radio sources. The magnetic field setup in the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 Martin Huarte-Espinosa , Martin Krause , Paul Alexander

(abridged) Significant progress has been made in the last years in the understanding of the jet formation mechanism through a combination of numerical simulations and analytical MHD models for outflows characterized by the symmetry of…

Solar and Stellar Astrophysics · Physics 2015-05-18 Matthias Stute , Jose Gracia , Kanaris Tsinganos , Nektarios Vlahakis

We present the results of large scale, three-dimensional magneto-hydrodynamics simulations of disc-winds for different initial magnetic field configurations. The jets are followed from the source to 90 AU scale, which covers several pixels…

Solar and Stellar Astrophysics · Physics 2015-06-23 Jan Staff , Nico Koning , Rachid Ouyed , Adam Thompson , Ralph Pudritz

Neutron stars and black holes in X-ray binaries are observed to host strong collimated jets in the hard spectral state. Numerical simulations can act as a valuable tool in understanding the mechanisms behind jet formation and its…

High Energy Astrophysical Phenomena · Physics 2023-12-15 Pushpita Das , Oliver Porth

We argue the behavior of Poynting flux-dominated outflows from AGN in the galactic cluster systems by performing three-dimensional MHD simulations within the framework of the "magnetic tower" model. Of particular interests are the structure…

Astrophysics · Physics 2007-07-12 Masanori Nakamura , Hui Li , Steven Diehl , Shengtai Li

Employing 3D GRMHD simulation, we study the images of a geometrically thin jet, whose emissions concentrate on its surface, for accretion system surrounding a central spinning BH. By introducing a strong magnetic field, we observe three…

High Energy Astrophysical Phenomena · Physics 2023-11-28 Ye Shen , Yehui Hou , Zhong-Ying Fan , Minyong Guo , Bin Chen

We present a self-similar, steady-state model describing both a magnetized accretion disc and a magnetohydrodynamic jet. We focus on the role of a hot corona in such a structure. This corona enables the disc to launch various types of jets.…

Astrophysics · Physics 2007-05-23 Fabien Casse , Jonathan Ferreira

The theory of jet emitting disks (JEDs) provides a mathematical framework for a self-consistent treatment of steady-state accretion and ejection. A large-scale vertical magnetic field threads the accretion disk where magnetic turbulence…

High Energy Astrophysical Phenomena · Physics 2024-12-11 N. Zimniak , J. Ferreira , J. Jacquemin-Ide

Jet formation is connected most probably with matter acceleration from the vicinity of rotating magnetized bodies. It is usually related to the mass outflows and ejection from accretion disks around black holes. Problem of jet collimation…

Astrophysics · Physics 2009-11-06 G. S. Bisnovatyi-Kogan , N. V. Ardeljan , S. G. Moiseenko

Magnetic fields are believed to play an essential role in astrophysical jets with observations suggesting the presence of helical magnetic fields. Here, we present three-dimensional (3D) ideal MHD simulationsof the Caltech plasma jet…

High Energy Astrophysical Phenomena · Physics 2014-11-07 Xiang Zhai , Hui Li , Paul M. Bellan , Shengtai Li

Magnetic fields are known to play a crucial role in the star formation process, particularly in the formation of jets and outflows from protostellar discs. The magnetic field structure in star forming regions is not always uniform and…

Solar and Stellar Astrophysics · Physics 2019-03-27 Isabella A. Gerrard , Christoph Federrath , Rajika Kuruwita