H2020Индивидуална стипендия2015–2017

COSMOVOID · Cosmology with voids and superclusters: combining theory, simulation and observation

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2015-10-01 → 2017-09-30
Финансиране от ЕС: 183 455 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Разпределението на материята във Вселената се анализира чрез огромни празни пространства (войдове) и свръхсграпчивания от галактики. Това помага да се разберат тъмната енергия, гравитацията и причините за ускореното разширяване на космоса.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Cosmology with voids and superclusters: combining theory, simulation and observation

This cosmology project developed novel methods of studying the contents, history and evolution of the Universe by analysing the distribution of matter on the largest scales, using voids and supercluster structures identified in galaxy surveys. The aims of the project were to propose new observables and new techniques of data analysis based on these structures in order to test theories of gravitation, dark energy and the initial conditions of the early Universe. Since the discovery in 1998 that the expansion of the Universe is accelerating, understanding the properties of the dark energy that causes it has been one of the main problems in cosmology. The possibility that the accelerated expansion could be due instead to modifications to the theory of gravity on the largest scales also requires investigation. Data on the large-scale structure of the Universe obtained from galaxy redshift surveys provide one of the primary means to distinguish between these alternatives. In particular, the use of special rare structures in the galaxy distribution, known as voids and superclusters, provide novel probes of many of these theories. At the start of the project, voids in particular were already known to be useful for testing theories of gravity, but there were important shortcomings in theoretical understanding of their properties and precise predictions for their observable effects that could be measured in the data. The three main objectives of the project were therefore identified as: 1. To use simulations to understand the properties and dynamics of voids and superclusters identified in galaxy data 2. To obtain predictions for observables to enable comparison of theory and data 3. To produce catalogues of voids and superclusters identified in the latest galaxy data from the Sloan Digital Sky Survey and the Dark Energy Survey, to enable observational tests of the results obtained from theory and simulation

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

The aim of this cosmology proposal is to study the contents, history and evolution of our Universe, using the distribution of matter on large scales. I propose to study new methods to identify and catalogue rare voids and superclusters in the large-scale structure of the Universe and to study their statistical, morphological and dynamical properties. I will use these studies to propose new observables and new techniques of data analysis based on these structures, and to use this knowledge to test theories of gravitation, dark energy and the initial conditions of the early Universe. Interest in cosmic voids in particular has increased greatly in recent years, as they have been suggested as extremely competitive probes of cosmology, according to some estimates significantly out-performing other methods. Yet there remain unsolved theoretical difficulties in the modelling of voids and even a lack of consensus on how to identify them and how to relate theory and observation. Even less is currently known about superclusters. These are among the important issues I propose to address. My proposal consists in roughly equal parts of: analysis of the latest high-quality survey data which will available from the Sloan Digital Sky Survey (SDSS) and the Dark Energy Survey (DES); analysis of the state-of-the-art Jubilee ISW and weak lensing simulations run on the Juropa supercomputer in Germany; and theoretical work to combine insights from data and simulation to improve our understanding of cosmology. The proposed work is to be carried out in collaboration with leading experts in the respective fields from across the European Community, in particular in the United Kingdom, Spain and Germany.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITY OF PORTSMOUTH HIGHER EDUCATION CORPORATION · PortsmouthКоординаторОбединеното кралство