Cosmology

Group “Fundamental Interactions”

The cosmology team includes researchers with expertise in Cosmology, General Relativity, Quantum Field Theory, and Particle Physics. They collaborate and share national and international grants with several groups of theorists, cosmologists, astronomers, astrophysicists, and particle physicists.

Over the past fifteen years, an avalanche of high-quality data has transformed cosmology into a field rich in results. It has become an ideal arena for testing and potentially falsifying predictions arising from several areas of fundamental physics. This abundance of information has recently enabled the discovery of unexpected phenomena such as the acceleration of the expansion of the universe and the detection of long-sought physical signals that had previously escaped observation, such as gravitational waves.

The core of our activities is organized around three main research directions:

Understanding the large-scale structure of the universe by studying the growth of structures in different regimes using statistical tools. Our objectives are to assess the contributions of the various forms of matter (ordinary and dark) to the processes of structure formation, and also to extract the values of the fundamental parameters of the cosmological model.
Revealing the nature of dark energy by studying the rich phenomenology of the accelerating universe. The goal is to refine our understanding both empirically—by testing the relevance of the standard description of gravity on large scales at the present time—and theoretically—by investigating which modified gravity models could generalize the current paradigm.
Assessing the consistency of the physical foundations of the cosmological model by testing certain fundamental assumptions made in data analysis, in order to guarantee the conceptual basis of the paradigm being used.

Team's directory

Team's publications

Computing the nucleon sigma terms at the physical point

Christian Torrero, For The Budapest-Marseille-Wuppertal Collaboration

32nd International Symposium on Lattice Field Theory (Lattice 2014), Jun 2014, New York, United States. pp.143

HAL arXiv

Conference papers

The VIMOS Public Extragalactic Redshift Survey (VIPERS). An unprecedented view of galaxies and large-scale structure at 0.5<z<1.2

L. Guzzo, M. Scodeggio, B. Garilli, B. R. Granett, U. Abbas, C. Adami, S. Arnouts, Julien Bel, M. Bolzonella, D. Bottini, et al.

Astronomy & Astrophysics - A&A, 2014, Volume 566, id.A108, 21 pp. (10.1051/0004-6361/201321489)

HAL DOI arXiv

Journal articles

Phenomenology of dark energy: exploring the space of theories with future redshift surveys

Federico Piazza, Heinrich Steigerwald, Christian Marinoni

Journal of Cosmology and Astroparticle Physics, 2014, 2014 (05), Issue 05, article id. 043, pp. (10.1088/1475-7516/2014/05/043)

HAL DOI arXiv

Journal articles

Probing non-standard gravity with the growth index: a background independent analysis

Heinrich Steigerwald, Julien Bel, Christian Marinoni

Journal of Cosmology and Astroparticle Physics, 2014, 2014 (05), pp.042. (10.1088/1475-7516/2014/05/042)

HAL DOI arXiv

Journal articles

The VIMOS Public Extragalactic Redshift Survey (VIPERS) : A quiescent formation of massive red-sequence galaxies over the past 9 Gyr

A. Fritz, M. Scodeggio, O. Ilbert, M. Bolzonella, I. Davidzon, J. Coupon, B. Garilli, L. Guzzo, G. Zamorani, U. Abbas, et al.

Astronomy & Astrophysics - A&A, 2014, 563, pp.A92. (10.1051/0004-6361/201322379)

HAL DOI arXiv

Journal articles

Determination of the abundance of cosmic matter via the cell count moments of the galaxy distribution (1)

Julien Bel, Christian Marinoni

Astronomy & Astrophysics - A&A, 2014, 563, Volume 563, id.A36, 11 pp. (10.1051/0004-6361/201321941)

HAL DOI arXiv

Journal articles

The VIMOS Public Extragalactic Survey (VIPERS) : First Data Release of 57 204 spectroscopic measurements

B. Garilli, L. Guzzo, M. Scodeggio, M. Bolzonella, U. Abbas, C. Adami, S. Arnouts, Julien Bel, D. Bottini, E. Branchini, et al.

Astronomy & Astrophysics - A&A, 2014, 562, pp.1. (10.1051/0004-6361/201322790)

HAL DOI arXiv

Journal articles

An efficient method to compute the residual phase on a Lefschetz thimble

M. Cristoforetti, F. Di Renzo, G. Eruzzi, A. Mukherjee, C. Schmidt, L. Scorzato, C. Torrero

Physical Review D, 2014, 89 (11), pp.114505. (10.1103/PhysRevD.89.114505)

HAL DOI arXiv

Journal articles

The VIMOS Public Extragalactic Redshift Survey (VIPERS) : A precise measurement of the galaxy stellar mass function and the abundance of massive galaxies at redshifts 0.5 < z < 1.3

I. Davidzon, M. Bolzonella, J. Coupon, O. Ilbert, S. Arnouts, S. de La Torre, A. Fritz, G. de Lucia, A. Iovino, B. R. Granett, et al.

Astronomy & Astrophysics - A&A, 2013, 558, pp.A23. (10.1051/0004-6361/201321511)

HAL DOI arXiv

Journal articles

The VIMOS Public Extragalactic Redshift Survey (VIPERS) : Galaxy clustering and redshift-space distortions at z ≃ 0.8 in the first data release

S. de La Torre, L. Guzzo, J. A. Peacock, E. Branchini, A. Iovino, B. R. Granett, U. Abbas, C. Adami, S. Arnouts, Julien Bel, et al.

Astronomy & Astrophysics - A&A, 2013, 557, pp.A54. (10.1051/0004-6361/201321463)

HAL DOI arXiv

Journal articles

AGAPITO	Alessandro	Ph.D.		Contact
BEL	Julien	Research teacher	+33.4.91.26.95.05	Contact
BERA	Sayantani	Post Ph.D.		Contact
CINTIA	Giordano	Post Ph.D.		Contact
DE RENZIS	Viola	Post Ph.D.		Contact
HU	Shiqian	Post Ph.D.		Contact
KALBOUNEH	Basheer	Post Ph.D.	+33.4.91.26.97.88	Contact
MANCARELLA	Michele	Research teacher		Contact
MARINONI	Christian	Research teacher Team leader « Cosmology »	+33.4.91.26.95.35	Contact
PEDROTTI	Alessandro	Ph.D.		Contact
PIAZZA	Federico	Research teacher	+33.4.91.26.95.00	Contact
RAMOS	Samuel	Ph.D.		Contact
SANTIAGO	Jessica	Post Ph.D.		Contact
SARMA	Maharshi	Ph.D.		Contact
TAXIL	Pierre	Research teacher emeritus	+33.4.91.26.95.52	Contact
VAREILLES	Simeon	Ph.D.		Contact
VIREY	Jean-Marc	Research teacher	+33.4.91.26.95.48	Contact
ZIANE	Mehdi-Bara	Ph.D.	+33.4.91.26.97.79	Contact