16 citations · 123 across the 14 of their papers we have counts for
14 papers
Mergers of double neutron stars with one high-spin component: brighter kilonovae and fallback accretion, weaker gravitational waves
S. Rosswog, P. Diener, F. Torsello +2
Neutron star (NS) mergers where both stars have negligible spins are commonly considered as the most likely ``standard'' case. In globular clusters, however, the majority of NSs ha…
The Lagrangian Numerical Relativity code SPHINCS_BSSN_v1.0
Stephan Rosswog, Francesco Torsello, Peter Diener
We present version 1.0 of our Lagrangian Numerical Relativity code SPHINCS_BSSN. This code evolves the full set of Einstein equations, but contrary to other Numerical Relativity co…
Simulating neutron star mergers with the Lagrangian Numerical Relativity code SPHINCS_BSSN
P. Diener, S. Rosswog, F. Torsello
We present the first neutron star merger simulations performed with the newly developed Numerical Relativity code SPHINCS_BSSN. This code evolves the spacetime on a mesh using the…
On the stability of bimetric structure formation
Marcus Högås, Francesco Torsello, Edvard Mörtsell
Bimetric gravity can reproduce the accelerated expansion of the Universe, without a cosmological constant. However, the stability of these solutions to linear perturbations has bee…
Generalized Vaidya solutions in bimetric gravity
Marcus Högås, Mikica Kocic, Francesco Torsello +1
In general relativity, the endpoint of spherically symmetric gravitational collapse is a Schwarzschild--[(A)dS] black hole. In bimetric gravity, it has been speculated that a stati…
Spherical dust collapse in bimetric relativity: Bimetric polytropes
Mikica Kocic, Francesco Torsello, Marcus Högås +1
We present a method for solving the constraint equations in the Hassan-Rosen bimetric theory to determine the initial data for the gravitational collapse of spherically symmetric d…
: A Mathematica package for exact computations in bimetric relativity
Francesco Torsello
We present , a Mathematica package for exact computations in 31 bimetric relativity. It is based on the bundle, which can handle computations inv…
The mean gauges in bimetric relativity
Francesco Torsello
The choice of gauge in numerical relativity is crucial in avoiding coordinate and curvature singularities. In addition, the gauge can affect the well-posedness of the system. In th…
Covariant BSSN formulation in bimetric relativity
Francesco Torsello, Mikica Kocic, Marcus Högås +1
Numerical integration of the field equations in bimetric relativity is necessary to obtain solutions describing realistic systems. Thus, it is crucial to recast the equations as a…
On the ratio of lapses in bimetric relativity
Mikica Kocic, Anders Lundkvist, Francesco Torsello
The two lapse functions in the Hassan-Rosen bimetric theory are not independent. Without knowing the relation between them, one cannot evolve the equations in the 3+1 formalism. Th…
Spacetime symmetries and topology in bimetric relativity
Francesco Torsello, Mikica Kocic, Marcus Högås +1
We explore spacetime symmetries and topologies of the two metric sectors in Hassan-Rosen bimetric theory. We show that, in vacuum, the two sectors can either share or have separate…
On Birkhoff's theorem in ghost-free bimetric theory
Mikica Kocic, Marcus Högås, Francesco Torsello +1
We consider the Hassan-Rosen bimetric field equations in vacuum when the two metrics share a single common null direction in a spherically symmetric configuration. By solving these…
Algebraic Properties of Einstein Solutions in Ghost-Free Bimetric Theory
Mikica Kocic, Marcus Högås, Francesco Torsello +1
A known fact is that an Einstein solution in one sector in ghost-free bimetric theory implies an Einstein solution in the other sector. Earlier studies have also shown that some cl…
Classification and asymptotic structure of black holes in bimetric theory
Francesco Torsello, Mikica Kocic, Edvard Mortsell
We study general properties of static and spherically symmetric bidiagonal black holes in Hassan-Rosen bimetric theory. In particular, we explore the behaviour of the black hole so…