8 papers
An analytic study of Bondi-Hoyle-Lyttleton accretion
T. Foglizzo, M. Ruffert
The adiabatic shock produced by a compact object moving supersonically relative to a gas with uniform entropy and no vorticity is a source of entropy gradients and vorticity. We in…
Non-axisymmetric wind-accretion simulations. II. Density gradients
M. Ruffert
The hydrodynamics of a variant of classical Bondi-Hoyle-Lyttleton accretion is investigated: a totally absorbing sphere moves at various Mach numbers (3 and 10) relative to a mediu…
Merging Neutron Stars and Black Holes as Sources of Gamma-Ray Bursts and Heavy Elements
H. -Th. Janka, M. Ruffert, T. Eberl
Hydrodynamic simulations were performed of the dynamical phase of the merging of binary neutron stars (NS-NS) and of neutron star black hole binaries (NS-BH), using the physical nu…
Colliding neutron stars --- Gravitational waves, neutrino emission, and gamma-ray bursts
Maximilian Ruffert, H. -Thomas Janka
Three-dimensional hydrodynamical simulations are presented for the direct head-on or off-center collision of two neutron stars, employing a basically Newtonian PPM code but includi…
Simulations of non-axisymmetric rotational core collapse
M. Rampp, E. Mueller, M. Ruffert
We report on the first three-dimensional hydrodynamic simulations of secular and dynamical non-axisymmetric instabilities in collapsing, rapidly rotating stellar cores which extend…
Coalescing neutron stars -- gravitational waves from polytropic models
M. Ruffert, M. Rampp, H. -Th. Janka
The dynamics, time evolution of the mass distribution, and gravitational wave signature of coalescing neutron stars described by polytropes are compared with three simulations publ…