29 citations · 142 across the 24 of their papers we have counts for
8 papers · 1 filter
An implicit numerical algorithm for solving the general relativistic hydrodynamical equations around accreting compact objects
Ahmad Hujeirat, Max Camenzind, Bernhard W. Keil
An implicit algorithm for solving the equations of general relativistic hydrodynamics in conservative form in three-dimensional axi-symmetry is presented. This algorithm is a direc…
Advanced numerical methods in astrophysical fluid dynamics
A. Hujeirat, B. W. Keil, F. Heitsch
Computational gas dynamics has become a prominent research field both in astrophysics and cosmology. In the first part of this review we intend to briefly describe several of the n…
Compressed low Mach number flows in astrophysics: a nonlinear Newtonian numerical solver
A. Hujeirat, F. -K. Thielemann, J. Dusek +1
Internal flows inside gravitationally stable astrophysical objects, such as the Sun, stars and compact stars are compressed and extremely subsonic. Such low Mach number flows are u…
A method for relaxing the CFL-condition in time explicit schemes
A. Hujeirat
A method for relaxing the CFL-condition, which limits the time step size in explicit methods in computational fluid dynamics, is presented. The method is based on re-formulating ex…
A model for electromagnetic extraction of rotational energy and formation of accretion-powered jets in radio galaxies
A. Hujeirat, R. Blandford
A self-similar solution for the 3D axi-symmetric radiative MHD equations, which revisits the formation and acceleration of accretion-powered jets in AGNs and microquasars, is prese…
A model for the jet-disk connection in BH accreting systems
A. Hujeirat, M. Livio, M. Camenzind +1
Based on theoretical arguments and quasi-stationary radiative MHD calculations, a model for an accretion-powered jet is presented. It is argued that accretion disks around BHs cons…
Jet-formation in accreting black hole systems and in GRB
A. Hujeirat
Most powerful jets are observed to emanate from accreting black hole systems. Recent quasi-stationary radiative MHD calculations reveal that jet-launching start in the innermost re…
Ion-dominated plasma and the origin of jets in quasars
A. Hujeirat, M. Camenzind, M. Livio
Low cooling plasmas associated with large kinetic energies are likely to be the origin of the kpc-extended and well collimated extra-galactic jets. It is proposed that jets are lau…