COSMOTOOLKIT
Computing in the dark sector: a Cactus toolkit for modified-gravity cosmologies
| Coordinatore | MAX PLANCK GESELLSCHAFT ZUR FOERDERUNG DER WISSENSCHAFTEN E.V.
Organization address
address: Hofgartenstrasse 8 contact info |
| Nazionalità Coordinatore | Germany [DE] |
| Totale costo | 75˙000 € |
| EC contributo | 75˙000 € |
| Programma | FP7-PEOPLE
Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) |
| Code Call | FP7-PEOPLE-2009-RG |
| Funding Scheme | MC-IRG |
| Anno di inizio | 2010 |
| Periodo (anno-mese-giorno) | 2010-06-01 - 2013-05-31 |
Partecipanti
| # | ||||
|---|---|---|---|---|
| 1 |
MAX PLANCK GESELLSCHAFT ZUR FOERDERUNG DER WISSENSCHAFTEN E.V.
Organization address
address: Hofgartenstrasse 8 contact info |
DE (MUENCHEN) | coordinator | 75˙000.00 |
Mappa
Word cloud
Esplora la "nuvola delle parole (Word Cloud) per avere un'idea di massima del progetto.
Obiettivo del progetto (Objective)
'Cosmology has entered a new era. After the surprising lessons learnt from recent observations and the ensuing revision of many traditional tenets, an entirely new set of questions has emerged in this field, and intensive theoretical searches are under way to find new physical mechanisms capable of answering them. Whilst intriguing ideas are continuously introduced, testing their consequences against the results of upcoming observative missions is a complex problem that requires accurate modelling of realistic scenarios, achievable only via numerical methods. The current modelling tools are, however, limited to simplified settings where the spacetime background is not evolved or heavy symmetry assumptions are made in order to reduce the dimensionality of the problem. In order to extend the domain of current codes, we intend to test cosmologically-relevant proposals using Cactus, a software framework for scientific codes inspired by software design concepts such as modularity, reusability and vast compatibilty across modern architectures. Cactus provides, among others, suites of tools for discretizing partial differential equations, handling parallel computations and concurrent I/O, and currently serves as a worldwide standard for three-dimensional, fully relativistic simulations of astrophysical-scale systems. In this proposal, we present an incremental plan for laying the foundations of a Cactus toolkit dedicated to cosmology; we will start out modelling the cosmic dynamics according to a selection of theories of gravity alternative to General Relativity.'
Introduzione (Teaser)
Progress in the field of cosmology has always been closely tied to the availability of easy-to-use software tools and sufficient computational resources. An EU-funded project developed such a computational base for the study of elusive properties of dark energy and dark matter.
Descrizione progetto (Article)
Numerical simulations are effective tools that provide robust predictions to solve cosmological problems, including the birth and growth of astrophysical objects. These estimations of how various physical processes evolve, once compared to present and future observations, can help assess the main cosmological parameters.
The available computational resources permit the study of a multitude of astrophysical processes in the observable universe. However, 95 % of the energy in our universe is provided by two components of an as-of-yet unknown nature. Dark energy and dark matter was the focus of the 'Computing in the dark sector: a Cactus toolkit for modified-gravity cosmologies' (COSMOTOOLKIT) project.
The COSMOTOOLKIT project was devoted to extending the freely accessible Einstein toolkit for use in numerical cosmology. This toolkit, developed by researchers around the world, combines a set of tools needed to simulate black holes, collapsing stars and other compact objects. COSMOTOOLKIT researchers developed a set of new software tools and libraries that can enable new science.
Specifically, numerical techniques were incorporated for the evolution of fluids such as cosmic dust and scalar gravitational fields. Besides simulations of regions larger than a few gigaparsecs, the computational basis was adapted to allow the first 3D models of our universe. The groundwork was also laid to support theoretical efforts to define gravitational wave signatures.
In parallel, the existence and uniqueness of solutions for Einstein's field equations on space-times that are periodic were investigated. While solutions were sought for half a century, the COSMOTOOLKIT project was the first to unveil the complete behaviour of periodic lattices of black holes. The rich phenomenology was described through numerical simulations for expanding lattices.
The online portal http://blackholelattices.wikidot.com/ ('The black-hole-lattice lab') was established to share the new codes and realistically model cosmological phenomena. This will also serve as a repository of information on black holes and a place for scientists to meet and discuss. Close collaboration had been fruitful within the COSMOTOOLKIT project and will be necessary for the optimisation of the numerical methods.