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Neutron stars with solid components in general relativity

Objetivo

With densities reaching well beyond those that can be created in the laboratory, neutron stars provide a unique opportunity for studying the extremes of physics. The potential presence of exotic particles like hyperons and deconfined quarks, and the superfluid components, representing the largest known quantum mechanical systems, present a serious challenge for theoretical physics.

Neutron stars are potentially good emitters of gravitational radiation. This is particularly interesting as new detectors are becoming operational world wide, and one may hope to be able to use such waves as a probe of neutron star physics. Even though the supranuclear equation of state remains uncertain, the modelling that is essential for the extraction of useful information fro m observations has steadily improved over the past decades.

In particular, recent research moves beyond the standard perfect fluid approximation and considers effects of e.g. viscosity and large-scale superfluidity. The proposed project represents another important step in this direction as it addresses the rigidity of the neutron star crust from a fundamental point of view.

Our aim is to produce realistic neutron star models with solid crusts using the general relativistic theory of elasticity. Much effort will be devoted to the description of the elastic structure, represented by a metric tensor, of the different parts of the crust.

Our approach will make it possible to analyse several key questions:
- How is strain built up in a star as it cools/spins down?
- Can small pulsar glitches be caused by the release of this strain?
- How are various quasinormal-modes, in particular the so-called r-modes, damped by friction at the crust-core interface?
- Is the superfluid-crust interaction responsible for large pulsar glitches?

In addition, the project will help improve the templates that are essential for successful detection of the gravitational waves emitted from various mechanisms involving neutron stars.

Ámbito científico (EuroSciVoc)

Tema(s)

Convocatoria de propuestas

FP6-2002-MOBILITY-5
Consulte otros proyectos de esta convocatoria

Régimen de financiación

EIF - Marie Curie actions-Intra-European Fellowships

Coordinador

DEPARTMENT OF MATHEMATICS, UNIVERSITY OF SOUTHAMPTON
Aportación de la UE
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Coste total
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