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ARTHUS SIGNED

Advances in Research on Theories of the Dark Universe - Inhomogeneity Effects in Relativistic Cosmology

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EC-Contrib. €

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Partnership

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Project "ARTHUS" data sheet

The following table provides information about the project.

Coordinator
UNIVERSITE LYON 1 CLAUDE BERNARD 

Organization address
address: BOULEVARD DU 11 NOVEMBRE 1918 NUM43
city: VILLEURBANNE CEDEX
postcode: 69622
website: www.univ-Iyon1.fr

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country France [FR]
 Total cost 2˙091˙000 €
 EC max contribution 2˙091˙000 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2016-ADG
 Funding Scheme ERC-ADG
 Starting year 2017
 Duration (year-month-day) from 2017-09-01   to  2022-08-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    UNIVERSITE LYON 1 CLAUDE BERNARD FR (VILLEURBANNE CEDEX) coordinator 2˙091˙000.00

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 Project objective

The project ARTHUS aims at determining the physical origin of Dark Energy: in addition to the energy sources of the standard model of cosmology, effective terms arise through spatially averaging inhomogeneous cosmological models in General Relativity. It has been demonstrated that these additional terms can play the role of Dark Energy on large scales (but they can also mimic Dark Matter on scales of mass accumulations). The underlying rationale is that fluctuations in the Universe generically couple to spatially averaged intrinsic properties of space, such as its averaged scalar curvature, thus changing the global evolution of the effective (spatially averaged) cosmological model. At present, we understand these so- called backreaction effects only qualitatively. The project ARTHUS is directed towards a conclusive quantitative evaluation of these effects by developing generic and non-perturbative relativistic models of structure formation, by statistically measuring the key-variables of the models in observations and in simulation data, and by reinterpreting observational results in light of the new models. It is to be emphasized that there is no doubt about the existence of backreaction effects; the question is whether they are even capable of getting rid of the dark sources (as some models discussed in the literature suggest), or whether their impact is substantially smaller. The project thus addresses an essential issue of current cosmological research: to find pertinent answers concerning the quantitative impact of inhomogeneity effects, a necessary, worldwide recognized step toward high-precision cosmology. If the project objectives are attained, the results will have a far-reaching impact on theoretical and observational cosmology, on the interpretation of astronomical experiments such as Planck and Euclid, as well as on a wide spectrum of particle physics theories and experiments.

 Publications

year authors and title journal last update
List of publications.
2020 Etienne Jaupart, Guillaume Laibe
Channels for streaming instability in dusty discs
published pages: 4591-4598, ISSN: 0035-8711, DOI: 10.1093/mnras/staa057
Monthly Notices of the Royal Astronomical Society 492/4 2020-04-01
2019 Thomas Buchert, Thomas Mädler
Editorial note to: On the Newtonian limit of Einstein’s theory of gravitation (by Jürgen Ehlers)
published pages: 162, ISSN: 0001-7701, DOI: 10.1007/s10714-019-2623-1
General Relativity and Gravitation 51/12 2020-04-01
2020 Nezihe Uzun
Reduced phase space optics for general relativity: symplectic ray bundle transfer
published pages: 45002, ISSN: 0264-9381, DOI: 10.1088/1361-6382/ab60b5
Classical and Quantum Gravity 37/4 2020-04-01
2020 Thomas Buchert, Pierre Mourier, Xavier Roy
On average properties of inhomogeneous fluids in general relativity III: general fluid cosmologies
published pages: 27, ISSN: 0001-7701, DOI: 10.1007/s10714-020-02670-6
General Relativity and Gravitation 52/3 2020-04-01
2019 Job Feldbrugge, Matti van Engelen, Rien van de Weygaert, Pratyush Pranav, Gert Vegter
Stochastic homology of Gaussian vs. non-Gaussian random fields: graphs towards Betti numbers and persistence diagrams
published pages: 052-052, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2019/09/052
Journal of Cosmology and Astroparticle Physics 2019/09 2020-03-11
2019 Mourier, Pierre
Cosmologie inhomogène relativiste : modèles non perturbatifs et moyennes spatiales des équations d’Einstein
published pages: 198 pages, ISSN: , DOI:
\"Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]. Université de Lyon, 2019. English. ⟨NNT : 2019LYSE1116⟩\" tel-02299373 2020-03-11
2019 J. Richard, J.-P. Kneib, C. Blake, A. Raichoor, J. Comparat, T. Shanks, J. Sorce, M. Sahlén, C. Howlett, E. Tempel, R. McMahon, M. Bilicki, B. Roukema, J. Loveday, D. Pryer, T. Buchert, C. Zhao (for the CRS team)
4MOST Consortium Survey 8: Cosmology Redshift Survey (CRS)
published pages: 50-53, ISSN: , DOI: 10.18727/0722-6691/5127
The Messenger 175/3 2019-10-10
2019 Célia Desgrange, Asta Heinesen, Thomas Buchert
Dynamical spatial curvature as a fit to Type Ia supernovae
published pages: 1950143, ISSN: 0218-2718, DOI: 10.1142/s0218271819501438
International Journal of Modern Physics D 28/11 2019-10-10
2019 Quentin Vigneron, Thomas Buchert
Dark matter from backreaction? Collapse models on galaxy cluster scales
published pages: 175006, ISSN: 0264-9381, DOI: 10.1088/1361-6382/ab32d1
Classical and Quantum Gravity 36/17 2019-08-29
2019 Pratyush Pranav, Robert J. Adler, Thomas Buchert, Herbert Edelsbrunner, Bernard J. T. Jones, Armin Schwartzman, Hubert Wagner, Rien van de Weygaert
Unexpected topology of the temperature fluctuations in the cosmic microwave background
published pages: A163, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201834916
Astronomy & Astrophysics 627 2019-08-29
2019 Krzysztof Bolejko, Jan J. Ostrowski
Environment dependence of the growth of the most massive objects in the Universe
published pages: 9, ISSN: 2470-0010, DOI: 10.1103/PhysRevD.99.124036
Physical Review D 99/12 2019-08-29
2017 Thomas Buchert
On Backreaction in Newtonian cosmology
published pages: L46-L49, ISSN: 1745-3933, DOI: 10.1093/mnrasl/slx160
Monthly Notices of the Royal Astronomical Society: Letters 473/1 2019-06-11
2017 Fosca Al Roumi, Thomas Buchert, Alexander Wiegand
Lagrangian theory of structure formation in relativistic cosmology. IV. Lagrangian approach to gravitational waves
published pages: 123538, ISSN: 2470-0010, DOI: 10.1103/PhysRevD.96.123538
Physical Review D 96/12 2019-06-11
2018 Yong-Zhuang Li, Pierre Mourier, Thomas Buchert, David L. Wiltshire
Lagrangian theory of structure formation in relativistic cosmology. V. Irrotational fluids
published pages: 28, ISSN: 2470-0010, DOI: 10.1103/PhysRevD.98.043507
Physical Review D 98/4 2019-06-11
2018 Thomas Buchert
Is Dark Energy Simulated by Structure Formation in the Universe ?
published pages: 38, ISSN: , DOI: 10.22323/1.335.0038
Proceedings of 2nd World Summit: Exploring the Dark Side of the Universe — PoS(EDSU2018) 335 2019-03-20
2019 Asta Heinesen, Pierre Mourier, Thomas Buchert
On the covariance of scalar averaging and backreaction in relativistic inhomogeneous cosmology
published pages: 75001, ISSN: 0264-9381, DOI: 10.1088/1361-6382/ab0618
Classical and Quantum Gravity 36 2019-03-18
2018 Thomas Buchert, Pierre Mourier, Xavier Roy
Cosmological backreaction and its dependence on spacetime foliation
published pages: 24LT02, ISSN: 0264-9381, DOI: 10.1088/1361-6382/aaebce
Classical and Quantum Gravity 35/24 2019-03-11
2019 Pratyush Pranav, Rien van de Weygaert, Gert Vegter, Bernard J T Jones, Robert J Adler, Job Feldbrugge, Changbom Park, Thomas Buchert, Michael Kerber
Topology and Geometry of Gaussian random fields I: on Betti Numbers, Euler characteristic and Minkowski functionals
published pages: , ISSN: 0035-8711, DOI: 10.1093/mnras/stz541
Monthly Notices of the Royal Astronomical Society 2019-03-18

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