Axisymmetric simulations of magnetorotational core collapse: approximate inclusion of general relativistic effects

@article{Obergaulinger2006AxisymmetricSO,
  title={Axisymmetric simulations of magnetorotational core collapse: approximate inclusion of general relativistic effects},
  author={Martin Obergaulinger and Miguel A. Aloy and Harald Dimmelmeier and E. R. Mueller},
  journal={Astronomy and Astrophysics},
  year={2006},
  volume={457},
  pages={209-222}
}
We continue our investigations of the magnetorotational collapse of stellar cores by discussing simulations performed with a modified Newtonian gravitational potential that mimics general relativistic effects. The approximate TOV gravitational potential used in our simulations captures several basic features of fully relativistic simulations quite well. In particular, it is able to correctly reproduce the behavior of models that show a qualitative change both of the dynamics and the… 

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References

SHOWING 1-10 OF 38 REFERENCES

Relativistic MHD simulations of extragalactic jets

We have performed a comprehensive parameter study of the morphology and dynamics of axisymmetric, magnetized, relativistic jets by means of numerical simulations. The simulations have been performed

Axisymmetric simulations of magneto-rotational core collapse : dynamics and gravitational wave signal

Aims. We have performed a comprehensive parameter study of the collapse of rotating, strongly magnetized stellar cores in axisymmetry to determine their gravitational wave signature based on the

Gravitational radiation from rotational core collapse: Effects of magnetic fields and realistic equations of state

We perform a series of two-dimensional, axisymmetric, magnetohydrodynamic simulations of the rotational collapse of a supernova core. In order to calculate the waveforms of the gravitational wave, we

Relativistic simulations of rotational core collapse - II. Collapse dynamics and gravitational radiation

We have performed hydrodynamic simulations of relativistic rotational supernova core collapse in axisymmetry and have computed the gravitational radiation emitted by such an event. The Einstein

Magnetorotational Effects on Anisotropic Neutrino Emission and Convection in Core-Collapse Supernovae

We perform a series of two-dimensional hydrodynamic simulations of the magnetorotational collapse of a supernova core. We employ a realistic equation of state and take into account electron capture

Exploring the relativistic regime with Newtonian hydrodynamics: an improved effective gravitational potential for supernova simulations

We investigate the possibility approximating relativistic effects in hydrodynamical simulations of stellar core collapse and post-bounce evolution by using a modified gravitational potential in an

Three-dimensional simulations of stellar core collapse in full general relativity: Nonaxisymmetric dynamical instabilities

We perform fully general relativistic simulations of rotating stellar core collapse in three spatial dimensions. The hydrodynamic equations are solved using a high-resolution shock-capturing scheme.

Magneto-driven Shock Waves in Core-Collapse Supernovae

We perform a series of two-dimensional magnetohydrodynamic simulations of the rotational core collapse of a magnetized massive star. We employ a realistic equation of state and take into account the

Magnetorotational supernovae

We present the results of 2D simulations of the magnetorotational model of a supernova explosion. After the core collapse the core consists of rapidly a rotating proto-neutron star and a

Toward gravitational wave signals from realistic core-collapse supernova models

We have computed the gravitational wave signal from supernova core collapse by using the most realistic input physics available at present. We start from state-of-the-art progenitor models of