Publications (21)
A variational approach to resistive relativistic plasmas
N. Andersson, G. L. Comer, I. Hawke
We develop an action principle to construct the field equations for a multi-fluid system containing charge-neutral fluids, plasmas, and dissipation (via resistive interactions), by…
Effects of tangential velocity in the reactive relativistic Riemann problem
A. Harpole, I. Hawke
Type I X-ray bursts are thermonuclear burning events which occur on the surfaces of accreting neutron stars. Burning begins in a localised spot in the star's ocean layer before pro…
The nonlinear development of the relativistic two-stream instability
I. Hawke, G. L. Comer, N. Andersson
The two-stream instability has been mooted as an explanation for a range of astrophysical applications from GRBs and pulsar glitches to cosmology. Using the first nonlinear numeric…
Tidal deformations of neutron stars: The role of stratification and elasticity
A. J. Penner, N. Andersson, L. Samuelsson +2
We discuss the response of neutron stars to the tidal interaction in a compact binary system, as encoded in the Love number associated with the induced deformation. This problem is…
Dynamics and Gravitational Wave Signature of Collapsar Formation
C. D. Ott, C. Reisswig, E. Schnetter +7
We perform 3+1 general relativistic simulations of rotating core collapse in the context of the collapsar model for long gamma-ray bursts. We employ a realistic progenitor, rotatio…
Toward Resolved Simulations of Burning Fronts in Thermonuclear X-ray Bursts
M. Zingale, K. Eiden, Y. Cavecchi +9
We discuss the challenges of modeling X-ray bursts in multi-dimensions, review the different calculations done to date, and discuss our new set of ongoing simulations. We also desc…
Covariant approach to relativistic large-eddy simulations: Lagrangian filtering
T. Celora, M. J. Hatton, I. Hawke +1
We present a proof-of-principle implementation of the first fully covariant filtering scheme applied to relativistic fluid turbulence. The filtering is performed with respect to sp…
Local magneto-shear instability in Newtonian gravity
T. Celora, I. Hawke, N. Andersson +1
The magneto-rotational instability (MRI) - which is due to an interplay between a sheared background and the magnetic field - is commonly considered a key ingredient for developing…
Beyond ideal magnetohydrodynamics: Resistive, reactive and relativistic plasmas
N. Andersson, K. Dionysopoulou, I. Hawke +1
We develop a new framework for the modelling of charged fluid dynamics in general relativity. The model, which builds on a recently developed variational multi-fluid model for diss…
Crustal failure during binary inspiral
A. J. Penner, N. Andersson, D. I. Jones +2
We present the first fully relativistic calculations of the crustal strain induced in a neutron star by a binary companion at the late stages of inspiral, employing realistic equat…
3D Collapse of Rotating Stellar Iron Cores in General Relativity including Deleptonization and a Nuclear Equation of State
C. D. Ott, H. Dimmelmeier, A. Marek +4
We present results from the first 2D and 3D simulations of the collapse of rotating stellar iron cores in general relativity employing a finite-temperature equation of state and an…
Action based approach to dissipative relativistic fluid systems
G. L. Comer, N. Andersson, T. Celora +1
We develop an action principle for a relativistic two-fluid system with dissipation. The specific constituents of the model - which serves as a proof of principle - are particles a…
Formulating bulk viscosity for neutron star simulations
T. Celora, I. Hawke, P. C. Hammond +2
In order to extract the precise physical information encoded in the gravitational and electromagnetic signals from powerful neutron-star merger events, we need to include as much o…
Scientific Objectives of Einstein Telescope
B. Sathyaprakash, M. Abernathy, F. Acernese +222
The advanced interferometer network will herald a new era in observational astronomy. There is a very strong science case to go beyond the advanced detector network and build detec…
Numerical simulations of interfaces in relativistic hydrodynamics
S. T. Millmore, I. Hawke
We consider models of relativistic matter containing sharp interfaces across which the matter model changes. These models will be relevant for neutron stars with crusts, phase tran…
Problematic systematics in neutron-star merger simulations
F. Gittins, R. Matur, N. Andersson +1
Next-generation gravitational-wave instruments are expected to constrain the equation of state of dense nuclear matter by observing binaries involving neutron stars. We highlight a…
Beyond ideal magnetohydrodynamics: From fibration to 3+1 foliation
N. Andersson, I. Hawke, K. Dionysopoulou +1
We consider a resistive multi-fluid framework from the 3+1 space-time foliation point-of-view, paying particular attention to issues relating to the use of multi-parameter equation…
Three-dimensional relativistic simulations of rotating neutron-star collapse to a Kerr black hole
L. Baiotti, I. Hawke, P. J. Montero +5
We present a new three-dimensional fully general-relativistic hydrodynamics code using high-resolution shock-capturing techniques and a conformal traceless formulation of the Einst…
Gravitational-Wave Emission from Rotating Gravitational Collapse in three Dimensions
L. Baiotti, I. Hawke, L. Rezzolla +1
We present the first calculation of gravitational wave emission produced in the gravitational collapse of uniformly rotating neutron stars to black holes in fully three-dimensional…
The physics of non-ideal general relativistic magnetohydrodynamics
N. Andersson, I. Hawke, T. Celora +1
We consider a framework for non-ideal magnetohydrodynamics in general relativity, paying particular attention to the physics involved. The discussion highlights the connection betw…
Oscillations of rapidly rotating stratified neutron stars
A. Passamonti, B. Haskell, N. Andersson +2
We use time-evolutions of the linear perturbation equations to study the oscillations of rapidly rotating neutrons stars. Our models account for the buoyancy due to composition gra…