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Dance of galaxies: testing General Relativity and alternatives using galaxy velocity fields

Total Cost €


EC-Contrib. €






Project "GalaxyDance" data sheet

The following table provides information about the project.

Centrum Fizyki Teoretycznej Polskiej Akademii Nauk 

Organization address
address: Al. Lotnikow 32/46
city: Warszawa
postcode: 02-668

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 Poland [PL]
 Project website
 Total cost 146˙462 €
 EC max contribution 146˙462 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2016
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2017
 Duration (year-month-day) from 2017-09-04   to  2019-09-03


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    Centrum Fizyki Teoretycznej Polskiej Akademii Nauk PL (Warszawa) coordinator 146˙462.00


 Project objective

We propose to use information encoded in peculiar velocity statistics of galaxies in the Local Universe as well as observed redshift space distortions (RSD) of distant galaxies for rendering new and very precise constraints on the validity of General Relativity (GR) and competing theories of modified gravity (MG) on cosmological and intergalactic scales. The main objectives and deliverables of our proposed research programme are: -To obtain precise modeling of both GR and MOG signatures in galaxy velocity field; -To develop self-consistent models of RSD for a wide class of MOG models; -To study the systematic impact of baryonic physics on velocity and clustering observables; -To perform a robust comparison of the predicted and observed velocity and RSD signal; -To compare cosmological parameters estimated using separately both methods; We plan to conduct our studies on GR and MG by developing methods proposed by us in previous works. For this goal it is necessary to develop a self-consistent RSD theory for MG. We will put emphasis here on the construction of theoretical models for anisotropic 2-point statistics, that will in a precise way model relations between theoretical quantities and observed ones. As a complementary probe and an important consistency test we plan to model and measure from observations 2-point correlation statistics of radial components of galaxy peculiar velocities. Our project, aimed at using galaxy velocities to test GR and MG theories on cosmological scales, will produce significant and crucial research deliverables that are necessary to fully exploit the new possibilities that the rapidly approaching era of big cosmological data will offer.


year authors and title journal last update
List of publications.
2018 Wojciech A. Hellwing, Maciej Bilicki, Noam I. Libeskind
Uneven flows: On cosmic bulk flows, local observers, and gravity
published pages: , ISSN: 2470-0010, DOI: 10.1103/PhysRevD.97.103519
Physical Review D 97/10 2020-01-27
2019 Mark R Lovell, David Barnes, Yannick Bahé, Joop Schaye, Matthieu Schaller, Tom Theuns, Sownak Bose, Robert A Crain, Claudio dalla Vecchia, Carlos S Frenk, Wojciech Hellwing, Scott T Kay, Aaron D Ludlow, Richard G Bower
The signal of decaying dark matter with hydrodynamical simulations
published pages: 4071-4089, ISSN: 0035-8711, DOI: 10.1093/mnras/stz691
Monthly Notices of the Royal Astronomical Society 485/3 2020-01-27
2019 Mark R. Lovell, Dmytro Iakubovskyi, David Barnes, Sownak Bose, Carlos S. Frenk, Tom Theuns, Wojciech A. Hellwing
Simulating the Dark Matter Decay Signal from the Perseus Galaxy Cluster
published pages: L24, ISSN: 2041-8213, DOI: 10.3847/2041-8213/ab13ac
The Astrophysical Journal 875/2 2020-01-27

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The information about "GALAXYDANCE" are provided by the European Opendata Portal: CORDIS opendata.

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