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CosTesGrav SIGNED

Cosmological Tests of Gravity

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Project "CosTesGrav" data sheet

The following table provides information about the project.

Coordinator
UNIVERSITY OF PORTSMOUTH HIGHER EDUCATION CORPORATION 

Organization address
address: WINSTON CHURCHILL AVENUE UNIVERSITY HOUSE
city: PORTSMOUTH
postcode: PO1 2UP
website: www.port.ac.uk

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 United Kingdom [UK]
 Total cost 1˙701˙132 €
 EC max contribution 1˙701˙132 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2014-CoG
 Funding Scheme ERC-COG
 Starting year 2015
 Duration (year-month-day) from 2015-09-01   to  2021-07-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    UNIVERSITY OF PORTSMOUTH HIGHER EDUCATION CORPORATION UK (PORTSMOUTH) coordinator 1˙701˙132.00

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 Project objective

Einstein’s theory of General Relativity (GR) is tested accurately within the local universe i.e., the solar system, but this leaves open the possibility that it is not a good description at the largest scales in the Universe. The standard model of cosmology assumes GR as a theory to describe gravity on all scales. In 1998, astronomers made a surprising discovery that the expansion of the Universe is accelerating, not slowing down. This late-time acceleration of the Universe has become the most challenging problem in theoretical physics. Within the framework of GR, the acceleration would originate from an unknown “dark energy.” Alternatively, it could be that there is no dark energy and GR itself is in error on cosmological scales. The standard model of cosmology is based on a huge extrapolation of our limited knowledge of gravity. This discovery of the late time acceleration of the Universe may require us to revise the theory of gravity and the standard model of cosmology based on GR.

The main objective of my project is to develop cosmological tests of gravity and seek solutions to the origin of the observed accelerated expansion of the Universe by challenging conventional GR. Upcoming surveys will make cosmological tests of gravity a reality in the next five years. There are remaining issues in developing theoretical frameworks for probing gravitational physics on cosmological scales. We construct modified gravity theories as an alternative to dark energy and analyse “screening mechanisms” to restore GR on scales where it is well tested. We then develop better theoretical frameworks to perform cosmological tests of gravity that include non-linear scales by exploiting our theoretical knowledge of the models and our state-of-the-art simulations.

This grant will exploit and develop the world-leading position of the group initiated by Kazuya Koyama at the University of Portsmouth funded by the ERC starting grant (2008-2013).

 Publications

year authors and title journal last update
List of publications.
2019 Hans A. Winther, Santiago Casas, Marco Baldi, Kazuya Koyama, Baojiu Li, Lucas Lombriser, Gong-Bo Zhao
Emulators for the nonlinear matter power spectrum beyond Λ CDM
published pages: , ISSN: 2470-0010, DOI: 10.1103/physrevd.100.123540
Physical Review D 100/12 2020-02-20
2018 Kazuya Koyama
Gravity beyond general relativity
published pages: 1848001, ISSN: 0218-2718, DOI: 10.1142/s0218271818480012
International Journal of Modern Physics D 27/15 2020-02-20
2020 Chiaki Hikage, Kazuya Koyama, Ryuichi Takahashi
Perturbation theory for the redshift-space matter power spectra after reconstruction
published pages: , ISSN: 2470-0010, DOI: 10.1103/physrevd.101.043510
Physical Review D 101/4 2020-02-20
2020 Hiromu Ogawa, Tsutomu Kobayashi, Kazuya Koyama
Relativistic stars in a cubic Galileon universe
published pages: , ISSN: 2470-0010, DOI: 10.1103/physrevd.101.024026
Physical Review D 101/2 2020-02-20
2020 Alejandro Aviles, Kazuya Koyama, Jorge L. Cervantes-Cota, Hans A. Winther, Baojiu Li
Marked correlation functions in perturbation theory
published pages: 006-006, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2020/01/006
Journal of Cosmology and Astroparticle Physics 2020/01 2020-02-20
2019 A. Emir Gümrükçüoğlu, Ryo Namba
Role of matter in gravitation: Going beyond the Einstein-Maxwell theory
published pages: , ISSN: 2470-0010, DOI: 10.1103/physrevd.100.124064
Physical Review D 100/12 2020-02-20
2019 Benjamin Bose, Kazuya Koyama, Hans A. Winther
Assessing non-linear models for galaxy clustering III: theoretical accuracy for stage IV surveys
published pages: 021-021, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2019/10/021
Journal of Cosmology and Astroparticle Physics 2019/10 2020-02-20
2019 Obinna Umeh, Kazuya Koyama
The galaxy bias at second order in general relativity with non-Gaussian initial conditions
published pages: 048-048, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2019/12/048
Journal of Cosmology and Astroparticle Physics 2019/12 2020-02-20
2017 Marco Crisostomi, Remko Klein, Diederik Roest
Higher derivative field theories: degeneracy conditions and classes
published pages: 124, ISSN: 1029-8479, DOI: 10.1007/JHEP06(2017)124
Journal of High Energy Physics 2017/6 2019-10-03
2019 Andrius Tamosiunas, David Bacon, Kazuya Koyama, Robert C. Nichol
Testing emergent gravity on galaxy cluster scales
published pages: 053-053, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2019/05/053
Journal of Cosmology and Astroparticle Physics 2019/05 2019-10-03
2019 Michael Kenna-Allison, A. Emir Gümrükçüoǧlu, Kazuya Koyama
Viability of bigravity cosmology
published pages: 104032, ISSN: 2470-0010, DOI: 10.1103/physrevd.99.104032
Physical Review D 99/10 2019-10-03
2016 Matthew Hull, Kazuya Koyama, Gianmassimo Tasinato
Covariantized vector Galileons
published pages: 64012, ISSN: 2470-0010, DOI: 10.1103/PhysRevD.93.064012
Physical Review D 93/6 2019-10-03
2016 Marco Crisostomi, Kazuya Koyama, Gianmassimo Tasinato
Extended scalar-tensor theories of gravity
published pages: 044-044, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2016/04/044
Journal of Cosmology and Astroparticle Physics 2016/04 2019-10-03
2017 Christian Fidler, Thomas Tram, Cornelius Rampf, Robert Crittenden, Kazuya Koyama, David Wands
Relativistic initial conditions for N-body simulations
published pages: 043-043, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2017/06/043
Journal of Cosmology and Astroparticle Physics 2017/06 2019-10-03
2017 Benjamin Bose, Kazuya Koyama, Wojciech A. Hellwing, Gong-Bo Zhao, Hans A. Winther
Theoretical accuracy in cosmological growth estimation
published pages: 23519, ISSN: 2470-0010, DOI: 10.1103/PhysRevD.96.023519
Physical Review D 96/2 2019-10-03
2016 Jeremy Sakstein, Harry Wilcox, David Bacon, Kazuya Koyama, Robert C. Nichol
Testing gravity using galaxy clusters: new constraints on beyond Horndeski theories
published pages: 019-019, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2016/07/019
Journal of Cosmology and Astroparticle Physics 2016/07 2019-10-03
2017 Benjamin Bose, Kazuya Koyama
A perturbative approach to the redshift space correlation function: beyond the Standard Model
published pages: 029-029, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2017/08/029
Journal of Cosmology and Astroparticle Physics 2017/08 2019-10-03
2015 Jeremy Sakstein, Kazuya Koyama
Testing the Vainshtein mechanism using stars and galaxies
published pages: 1544021, ISSN: 0218-2718, DOI: 10.1142/S0218271815440216
International Journal of Modern Physics D 24/12 2019-10-03
2016 Benjamin Bose, Kazuya Koyama
A perturbative approach to the redshift space power spectrum: beyond the Standard Model
published pages: 032-032, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2016/08/032
Journal of Cosmology and Astroparticle Physics 2016/08 2019-10-03
2017 Jeremy Sakstein, Eugeny Babichev, Kazuya Koyama, David Langlois, Ryo Saito
Towards strong field tests of beyond Horndeski gravity theories
published pages: 64013, ISSN: 2470-0010, DOI: 10.1103/PhysRevD.95.064013
Physical Review D 95/6 2019-10-03
2016 Marco Crisostomi, Matthew Hull, Kazuya Koyama, Gianmassimo Tasinato
Horndeski: beyond, or not beyond?
published pages: 038-038, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2016/03/038
Journal of Cosmology and Astroparticle Physics 2016/03 2019-10-03
2018 Marco Crisostomi, Kazuya Koyama
Self-accelerating universe in scalar-tensor theories after GW170817
published pages: , ISSN: 2470-0010, DOI: 10.1103/PhysRevD.97.084004
Physical Review D 97/8 2019-10-03
2016 Gong-Bo Zhao, Yuting Wang, Ashley J. Ross, Sarah Shandera, Will J. Percival, Kyle S. Dawson, Jean-Paul Kneib, Adam D. Myers, Joel R. Brownstein, Johan Comparat, Timothée Delubac, Pengyuan Gao, Alireza Hojjati, Kazuya Koyama, Cameron K. McBride, Andrés Meza, Jeffrey A. Newman, Nathalie Palanque-Delabrouille, Levon Pogosian, Francisco Prada, Graziano Rossi, Donald P. Schneider, Hee-Jong Seo, Charling Tao, Dandan Wang, Christophe Yèche, Hanyu Zhang, Yuecheng Zhang, Xu Zhou, Fangzhou Zhu, Hu Zou
The extended Baryon Oscillation Spectroscopic Survey: a cosmological forecast
published pages: 2377-2390, ISSN: 0035-8711, DOI: 10.1093/mnras/stw135
Monthly Notices of the Royal Astronomical Society 457/3 2019-10-03
2018 Benjamin Bose, Kazuya Koyama, Matthew Lewandowski, Filippo Vernizzi, Hans A. Winther
Towards precision constraints on gravity with the Effective Field Theory of Large-Scale Structure
published pages: 063-063, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2018/04/063
Journal of Cosmology and Astroparticle Physics 2018/04 2019-10-03
2017 Bridget Falck, Kazuya Koyama, Gong-Bo Zhao, Marius Cautun
Using voids to unscreen modified gravity
published pages: 3262-3272, ISSN: 0035-8711, DOI: 10.1093/mnras/stx3288
Monthly Notices of the Royal Astronomical Society 475/3 2019-10-03
2018 A. Emir Gümrükçüoğlu, Mehdi Saravani, Thomas P. Sotiriou
Hořava gravity after GW170817
published pages: 24032, ISSN: 2470-0010, DOI: 10.1103/PhysRevD.97.024032
Physical Review D 97/2 2019-10-03
2017 Wojciech A. Hellwing, Kazuya Koyama, Benjamin Bose, Gong-Bo Zhao
Revealing modified gravity signals in matter and halo hierarchical clustering
published pages: 23515, ISSN: 2470-0010, DOI: 10.1103/PhysRevD.96.023515
Physical Review D 96/2 2019-10-03
2017 Gong-Bo Zhao, Marco Raveri, Levon Pogosian, Yuting Wang, Robert G. Crittenden, Will J. Handley, Will J. Percival, Florian Beutler, Jonathan Brinkmann, Chia-Hsun Chuang, Antonio J. Cuesta, Daniel J. Eisenstein, Francisco-Shu Kitaura, Kazuya Koyama, Benjamin L’Huillier, Robert C. Nichol, Matthew M. Pieri, Sergio Rodriguez-Torres, Ashley J. Ross, Graziano Rossi, Ariel G. Sánchez, Arman Shafieloo, Jeremy L. Tinker, Rita Tojeiro, Jose A. Vazquez, Hanyu Zhang
Dynamical dark energy in light of the latest observations
published pages: 627-632, ISSN: 2397-3366, DOI: 10.1038/s41550-017-0216-z
Nature Astronomy 1/9 2019-10-03
2016 Thomas Tram, Christian Fidler, Robert Crittenden, Kazuya Koyama, Guido W. Pettinari, David Wands
The intrinsic matter bispectrum in ΛCDM
published pages: 058-058, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2016/05/058
Journal of Cosmology and Astroparticle Physics 2016/05 2019-10-03
2018 Kazuya Koyama, Obinna Umeh, Roy Maartens, Daniele Bertacca
The observed galaxy bispectrum from single-field inflation in the squeezed limit
published pages: 050-050, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2018/07/050
Journal of Cosmology and Astroparticle Physics 2018/07 2019-10-03
2017 Hans A. Winther, Kazuya Koyama, Marc Manera, Bill S. Wright, Gong-Bo Zhao
COLA with scale-dependent growth: applications to screened modified gravity models
published pages: 006-006, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2017/08/006
Journal of Cosmology and Astroparticle Physics 2017/08 2019-10-03
2016 J. Ben Achour, M. Crisostomi, K. Koyama, D. Langlois, K. Noui, G. Tasinato
Degenerate higher order scalar-tensor theories beyond Horndeski up to cubic order
published pages: 100, ISSN: 1029-8479, DOI: 10.1007/JHEP12(2016)100
Journal of High Energy Physics 2016/12 2019-10-03
2016 A. Emir Gümrükçüoğlu, Kazuya Koyama, and Shinji Mukohyama
Role of matter in extended quasidilaton massive gravity
published pages: 123510, ISSN: 2470-0010, DOI: 10.1103/PhysRevD.94.123510
Physical Review D 94 2019-10-03
2018 Simone Peirone, Kazuya Koyama, Levon Pogosian, Marco Raveri, Alessandra Silvestri
Large-scale structure phenomenology of viable Horndeski theories
published pages: 43519, ISSN: 2470-0010, DOI: 10.1103/PhysRevD.97.043519
Physical Review D 97/4 2019-10-03
2018 Thomas E. Collett, Lindsay J. Oldham, Russell J. Smith, Matthew W. Auger, Kyle B. Westfall, David Bacon, Robert C. Nichol, Karen L. Masters, Kazuya Koyama, Remco van den Bosch
A precise extragalactic test of General Relativity
published pages: 1342-1346, ISSN: 0036-8075, DOI: 10.1126/science.aao2469
Science 360/6395 2019-10-03
2016 Robert J. Hardwick, Vincent Vennin, Kazuya Koyama, David Wands
Constraining Curvatonic Reheating
published pages: 42, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2016/08/042
Journal of Cosmology and Astroparticle Physics 2016/08 2019-10-03
2017 Chiaki Hikage, Kazuya Koyama, Alan Heavens
Perturbation theory for BAO reconstructed fields: One-loop results in the real-space matter density field
published pages: 43513, ISSN: 2470-0010, DOI: 10.1103/PhysRevD.96.043513
Physical Review D 96/4 2019-10-03
2016 Christian Fidler, Thomas Tram, Cornelius Rampf, Robert Crittenden, Kazuya Koyama, David Wands
Relativistic interpretation of Newtonian simulations for cosmic structure formation
published pages: 031-031, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2016/09/031
Journal of Cosmology and Astroparticle Physics 2016/09 2019-10-03
2016 Harry Wilcox, Robert C. Nichol, Gong-Bo Zhao, David Bacon, Kazuya Koyama, A. Kathy Romer
Simulation tests of galaxy cluster constraints on chameleon gravity
published pages: 715-725, ISSN: 0035-8711, DOI: 10.1093/mnras/stw1617
Monthly Notices of the Royal Astronomical Society 462/1 2019-10-03
2018 M. Crisostomi, K. Noui, C. Charmousis, D. Langlois
Beyond Lovelock gravity: Higher derivative metric theories
published pages: 44034, ISSN: 2470-0010, DOI: 10.1103/PhysRevD.97.044034
Physical Review D 97/4 2019-10-03
2017 Christian Fidler, Thomas Tram, Cornelius Rampf, Robert Crittenden, Kazuya Koyama, David Wands
General relativistic weak-field limit and Newtonian N-body simulations
published pages: 022-022, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2017/12/022
Journal of Cosmology and Astroparticle Physics 2017/12 2019-10-03
2017 Jeremy Sakstein, Michael Kenna-Allison, Kazuya Koyama
Stellar pulsations in beyond Horndeski gravity theories
published pages: 007-007, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2017/03/007
Journal of Cosmology and Astroparticle Physics 2017/03 2019-10-03
2016 Wojciech A. Hellwing, Matthieu Schaller, Carlos S. Frenk, Tom Theuns, Joop Schaye, Richard G. Bower, Robert A. Crain
The effect of baryons on redshift space distortions and cosmic density and velocity fields in the EAGLE simulation
published pages: L11-L15, ISSN: 1745-3933, DOI: 10.1093/mnrasl/slw081
Monthly Notices of the Royal Astronomical Society: Letters 461/1 2019-10-03
2017 Benjamin L?Huillier, Hans A. Winther, David F. Mota, Changbom Park, Juhan Kim
Dark matter haloes in modified gravity and dark energy: interaction rate, small- and large-scale alignment
published pages: 3174-3183, ISSN: 0035-8711, DOI: 10.1093/mnras/stx700
Monthly Notices of the Royal Astronomical Society 468/3 2019-10-03
2017 Sownak Bose, Baojiu Li, Alexandre Barreira, Jian-hua He, Wojciech A. Hellwing, Kazuya Koyama, Claudio Llinares and Gong-Bo Zhao
Speeding up N-body simulations of modified gravity: chameleon screening models
published pages: 50, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2017/02/050
Journal of Cosmology and Astroparticle Physics 2 2019-10-03
2016 Alejo Stark, Christopher J. Miller, Nicholas Kern, Daniel Gifford, Gong-Bo Zhao, Baojiu Li, Kazuya Koyama, Robert C. Nichol
Probing theories of gravity with phase space-inferred potentials of galaxy clusters
published pages: 84036, ISSN: 2470-0010, DOI: 10.1103/PhysRevD.93.084036
Physical Review D 93/8 2019-10-03
2017 Wojciech A. Hellwing, Adi Nusser, Martin Feix, Maciej Bilicki
Not a Copernican observer: biased peculiar velocity statistics in the local Universe
published pages: stx213, ISSN: 0035-8711, DOI: 10.1093/mnras/stx213
Monthly Notices of the Royal Astronomical Society 2019-10-03
2016 Kazuya Koyama
Cosmological Tests of Modified Gravity
published pages: 4, ISSN: 0034-4885, DOI: 10.1088/0034-4885/79/4/046902
Reports on Progress in Physics 79 2019-10-03
2017 Sownak Bose Wojciech A. Hellwing Carlos S. Frenk Adrian Jenkins Mark R. Lovell John C. Helly Baojiu Li Violeta Gonzalez-Perez Liang Gao
Substructure and galaxy formation in the Copernicus Complexio warm dark matter simulations
published pages: 4520, ISSN: 0035-8711, DOI: 10.1093/mnras/stw2686
Monthly Notices of the Royal Astronomical Society 464 2019-10-03
2018 Marco Crisostomi, Kazuya Koyama
Vainshtein mechanism after GW170817
published pages: 21301, ISSN: 2470-0010, DOI: 10.1103/PhysRevD.97.021301
Physical Review D 97/2 2019-10-03
2016 Ying-li Zhang, Kazuya Koyama, Misao Sasaki, Gong-Bo Zhao
Acausality in nonlocal gravity theory
published pages: 39, ISSN: 1029-8479, DOI: 10.1007/JHEP03(2016)039
Journal of High Energy Physics 2016/3 2019-10-03
2017 Pablo Arnalte-Mur, Wojciech A. Hellwing, Peder Norberg
Real- and redshift-space halo clustering in f ( R ) cosmologies
published pages: stx196, ISSN: 0035-8711, DOI: 10.1093/mnras/stx196
Monthly Notices of the Royal Astronomical Society 2019-10-03
2018 Emanuela Dimastrogiovanni, Matteo Fasiello, Robert J. Hardwick, Hooshyar Assadullahi, Kazuya Koyama, David Wands
Non-Gaussianity from axion-gauge fields interactions during inflation
published pages: 029-029, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2018/11/029
Journal of Cosmology and Astroparticle Physics 2018/11 2019-10-03
2019 Juan Espejo, Simone Peirone, Marco Raveri, Kazuya Koyama, Levon Pogosian, Alessandra Silvestri
Phenomenology of large scale structure in scalar-tensor theories: Joint prior covariance of w DE , Σ , and μ in Horndeski theories
published pages: 23512, ISSN: 2470-0010, DOI: 10.1103/physrevd.99.023512
Physical Review D 99/2 2019-10-03
2019 A. Emir Gümrükçüoğlu, Kazuya Koyama
Generalizing the matter coupling in massive gravity: A search for new interactions
published pages: 84004, ISSN: 2470-0010, DOI: 10.1103/physrevd.99.084004
Physical Review D 99/8 2019-10-03
2019 Christian Fidler, Alexander Kleinjohann, Thomas Tram, Cornelius Rampf, Kazuya Koyama
A new approach to cosmological structure formation with massive neutrinos
published pages: 025-025, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2019/01/025
Journal of Cosmology and Astroparticle Physics 2019/01 2019-10-03
2019 M. Crisostomi, K. Koyama, D. Langlois, K. Noui, D.A. Steer
Cosmological evolution in DHOST theories
published pages: 030-030, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2019/01/030
Journal of Cosmology and Astroparticle Physics 2019/01 2019-10-03
2019 Noemi Frusciante, Ryotaro Kase, Kazuya Koyama, Shinji Tsujikawa, Daniele Vernieri
Tracker and scaling solutions in DHOST theories
published pages: 167-175, ISSN: 0370-2693, DOI: 10.1016/j.physletb.2019.01.009
Physics Letters B 790 2019-10-03

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