## General Relativity

We study the gravitational wave forms that radiate from either single or merging compact objects.

For queries about this topic, contact Andrew Penner.

View the calendar of events relating to this topic.

### Projects

### High-resolution shock-capturing (HRSC) methods for elastic matter in general relativity

**Carsten Gundlach, Ian Hawke, Stephanie Erickson** (Investigators)

We are designing HRSC methods for numerical simulation of elastic matter coupled to general relativity and later magnetic fields, with the ultimate aim of simulating old neutron stars, which have elastic crusts.

### Lattice Holographic Cosmology

**Andreas Juttner** (Investigator),
Matthew Mostert

This project will aim to develop new theoretical field methods and massively parallel computational algorithms to be utilised on both new computational architectures (e.g. Intel Xeon Phi) and existing high performance computers (HPCs).

The ultimate goal is to make predictions for the power spectrum and non-gaussianties of the CMB which would then be falsifiable by comparison to the Planck and WMAP data.

### Lattice Holographic Cosmology

This project will aim to develop new theoretical field methods and massively parallel computational algorithms to be utilised on both new computational architectures (e.g. Intel Xeon Phi) and existing high performance computers (HPCs).

### Lattice Holographic Cosmology

This project will aim to develop new theoretical field methods and massively parallel computational algorithms to be utilised on both new computational architectures (e.g. Intel Xeon Phi) and existing high performance computers (HPCs).

### Multiscale modelling of neutron star oceans

**Ian Hawke** (Investigator),
Alice Harpole

Type I X-ray bursts are explosions which occur on the surface of some

neutron stars. It is believed that the burning begins in a localised spot in the ocean of the

star before spreading across the entire surface. By gaining a better understanding of X-ray

bursts, it is hoped that tighter limits can be determined for other neutron star properties

such as the radius and magnetic field strength.

### Multiscale Relativistic Simulations

**Ian Hawke** (Investigator),
Alex Wright

There has been recent success in experiments, such as LIGO, in detecting the mergers of celestial objects via the gravitational waves they emit. By implementing numerical methods, we aim to speed up the numerical simulations of these events but up to two orders of magnitudes, and study binary inspirals in greater detail and over much larger timespans.

### Multiscale Relativistic Simulations

There has been recent success in experiments, such as LIGO, in detecting the mergers of celestial objects via the gravitational waves they emit. I will use numerical methods to simulate the inspiral of a black hole/neutron star binary system.

### Numerical Elastic Neutron Stars

**Ian Hawke, Ian Jones** (Investigators),
Andrew Penner

We study the astrophysical effects of the crust on a neutron star using an elasto-hydrodynamic model.

### Relativistic multifluids

**Ian Hawke** (Investigator)

Multiphase flow is a central model in fluid dynamics. Its extension to relativity is crucial for tackling many astrophysics problems, and has fascinating mathematical features.

### Self-Force and Black Hole Inspirals

**Sam Dolan** (Investigator)

We use IRIDIS to compute the self-force acting on a solar-mass black hole orbiting a supermassive black hole.