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

Torsion, an alternative to dark matter?

Andre Tilquin, Thomas Schucker

General Relativity and Gravitation, 2011, 43 (11), pp.2965-2978. (10.1007/s10714-011-1222-6)

Journal articles

The bimodality of the 10k zCOSMOS-bright galaxies up to z ~ 1: a new statistical and portable classification based on the optical galaxy properties

G. Coppa, M. Mignoli, G. Zamorani, S. Bardelli, S. J. Lilly, M. Bolzonella, M. Scodeggio, D. Vergani, P. Nair, L. Pozzetti, et al.

Astronomy & Astrophysics - A&A, 2011, 535, pp.10. (10.1051/0004-6361/201016130)

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Journal articles

The nonlinear biasing of the 10k zCOSMOS galaxies up to z~1

K. Kovac, C. Porciani, S. J. Lilly, Christian Marinoni, L. Guzzo, O. Cucciati, G. Zamorani, A. Iovino, P. Oesch, M. Bolzonella, et al.

The Astrophysical Journal, 2011, 731 (2), pp.102. (10.1088/0004-637X/731/2/102)

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Journal articles

The zCOSMOS-Bright survey: the clustering of early and late galaxy morphological types since z≃ 1

S. de La Torre, O. Le Fèvre, C. Porciani, L. Guzzo, B. Meneux, U. Abbas, L. Tasca, C. M. Carollo, T. Contini, J.-P. Kneib, et al.

Monthly Notices of the Royal Astronomical Society, 2011, 412 (2), pp.825. (10.1111/j.1365-2966.2010.17939.x)

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Journal articles

Comparison of the VIMOS-VLT Deep Survey with the Munich semi-analytical model

S. de La Torre, B. Meneux, G. de Lucia, J. Blaizot, O. Le Fèvre, B. Garilli, O. Cucciati, Y. Mellier, A. Pollo, U. Abbas, et al.

Astronomy & Astrophysics - A&A, 2011, 525, pp.125. (10.1051/0004-6361/201015540)

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Journal articles

A geometric measure of dark energy with pairs of galaxies

Christian Marinoni, Adeline Buzzi

Nature, 2010, 468 (7323), (10.1038/nature09577)

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Journal articles

K+a galaxies in the zCOSMOS Survey: Physical properties of systems in their post-starburst phase

D. Vergani, G. Zamorani, S. J. Lilly, F. Lamareille, C. Halliday, M. Scodeggio, C. Vignali, P. Ciliegi, M. Bolzonella, M. Bondi, et al.

Astronomy & Astrophysics - A&A, 2010, 509, pp.A42. (10.1051/0004-6361/200912802)

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Journal articles

The density field of the 10k zCOSMOS galaxies

K. Kovac, S. J. Lilly, O. Cucciati, C. Porciani, A. Iovino, G. Zamorani, P. Oesch, M. Bolzonella, C. Knobel, A. Finoguenov, et al.

The Astrophysical Journal, 2010, 708 (1), pp.505. (10.1088/0004-637X/708/1/505)

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Journal articles

zCOSMOS - 10k-bright spectroscopic sample. The bimodality in the Galaxy Stellar Mass Function: exploring its evolution with redshift

L. Pozzetti, M. Bolzonella, E. Zucca, G. Zamorani, S. Lilly, A. Renzini, M. Moresco, M. Mignoli, P. Cassata, L. Tasca, et al.

Astronomy & Astrophysics - A&A, 2010, 523, pp.A13. (10.1051/0004-6361/200913020)

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Journal articles

Tracking the impact of environment on the Galaxy Stellar Mass Function up to z~1 in the 10k zCOSMOS sample

M. Bolzonella, K. Kovac, L. Pozzetti, E. Zucca, O. Cucciati, S. J. Lilly, Y. Peng, A. Iovino, G. Zamorani, D. Vergani, et al.

Astronomy & Astrophysics - A&A, 2010, 524, pp.A76. (10.1051/0004-6361/200912801)

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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