DYNEOS · Constraints for the realistic equation of state of dense matter from the dynamical evolution of compact star space-times
FP6 — Marie Curie Actions (Human Resources and Mobility)
- Duration
- 2005-09-01 → 2007-02-28
- EU contribution
- €158,786
- Participants
- 1
- Scheme
- EIF
Lines connect the coordinator with its partners.
Results in brief
Final Activity Report Summary - DYNEOS (Constraints for the realistic equation of state of dense matter from the dynamical evolution of compact star space-times)
The project was intrinsically multidisciplinary and necessarily demanded to combine the knowledge from many different fields of physics of different scales (macro- and micro-physics), especially the General Theory of Relativity and the modern theory of dense matter (quantum mechanics, thermodynamics, nuclear physics...), astrophysics as well as applied mathematics (numerical algorithms) and advanced programming in order to use and develop numerical methods for solving multi-dimensional computational problems than cannot be solved analytically. The multidisciplinary treatment provided natural balance between analytical considerations and numerical calculations and was intrinsically connected with the choice of problems considered. The ultimate goal was to explore the mysterious and presently at large unknown interiors of compact astrophysical objects, thus studying the properties of extremely dense matter that is not likely to be accomplished in Earth-based experiments in near future. Proposed calculations aimed into precise numerical simulations of dynamics of compact objects within the framework of General Relativity. The use of certain verified in practice numerical techniques, namely pseudo-spectral methods, combined if neccesary with finite-differences methods, provided desired flexibility for optimal results. Developed state-of-the artnumerical codes gave opportunity for studying wide range of interesting unsolved problems, such as the state of rapidly rotating compact stars, oscillation and stability of non-linear modes for rotating stars, dynamical re-configuration of the star structure induced by the appearance of exotic phase core (so-called mini-collapse), inclusion of various realistic processes (i.e. accretion, viscosity, magnetic fields), elastic properties of the crust of spinning-down pulsars as well as direct computation of resulting gravitational wave emission in various physical settings.
Data: CORDIS, © European Union
Project objective
Earth-based experiments, the possible way to explore experimentally the regime of presently unknown equation of state of matter for densities higher than the nuclear saturation density, is to rely on the astrophysical observations.We should therefore study neutron stars in order to discover the mysteries of extremely dense matter physics, and to provide information about dynamical processes taking place in the Universe. Moreover, for present day neutron stars are the most promising sources of gravitational waves - the accurate theoretical waveforms are essential for detection.I propose to study the time evolution of neutron stars - physical processes present in binary systems at the last stage of in spiral phase, elastic properties of the crust in spinning-down pulsars, stability of non-linear modes for rapidly rotating stars, dynamical re-configuration of the star structure during phase transitions, collapse of supra-massive neutron star, as well as, in each case, direct computation of resulting gravitational wave emission.All mentioned above physical processes hopefully observed in future by neutrino, electromagnetic and gravitational wave detectors will carry a certain imprint of underlying dense matter physics. The problems will be solved analytically and numerically by means of the state-of-the-art pseudo-spectral multi-domain scientific library LORENE, developed by Paris-Meudon world-leading team of scientists.From a global point of view, the project agrees well with the collective multi-disciplinary effort carried out in Europe to consolidate the scientific community, and strengthen the collaboration with other international groups.
Original text from CORDIS.
Participants
- OBSERVATOIRE DE PARIS-MEUDON · PARISCoordinatorFrance
Links
Data: CORDIS, © European Union