Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Ilic, Stephane"'
Autor:
Grishin, Kirill, Mei, Simona, Ilic, Stephane, Aguena, Michel, Boutigny, Dominique, Paturel, Marie, Collaboration, the LSST Dark Energy Science
LSST will provide galaxy cluster catalogs up to z$\sim$1 that can be used to constrain cosmological models once their selection function is well-understood. We have applied the deep convolutional network YOLO for CLuster detection (YOLO-CL) to LSST s
Externí odkaz:
http://arxiv.org/abs/2409.03333
Autor:
Lamine, Brahim, Ozdalkiran, Yacob, Mirouze, Louis, Erdogan, Furkan, Ilic, Stéphane, Tutusaus, Isaac, Kou, Raphael, Blanchard, Alain
Recent cosmological observations have provided numerous new observations with increasing precision that have led to the era of precision cosmology. The exquisite quality of these observations opens new possibilities towards measuring fundamental cons
Externí odkaz:
http://arxiv.org/abs/2407.15553
Publikováno v:
A&A 677, A101 (2023)
(Abridged) Galaxy clusters are a powerful probe of cosmological models. Next generation large-scale optical and infrared surveys will reach unprecedented depths over large areas and require highly complete and pure cluster catalogs, with a well defin
Externí odkaz:
http://arxiv.org/abs/2301.09657
Publikováno v:
Open Journal of Astrophysics Volume 7, May 2024
The $\Lambda$CDM model faces several tensions with recent cosmological data and their increased accuracy. The mismatch between the values of the Hubble constant $H_0$ obtained from direct distance ladder measurements and from the cosmic microwave bac
Externí odkaz:
http://arxiv.org/abs/2205.05017
The current epoch of accelerated cosmic expansion is postulated to be driven by dark energy, which in the standard model takes the form of a cosmological constant with equation of state parameter $w=-1$. We propose an innovative perspective over the
Externí odkaz:
http://arxiv.org/abs/2203.08762
Publikováno v:
A&A 666, A34 (2022)
In this work, we examine whether further extensions to the $\Lambda$CDM model could alleviate the $\sigma_8$ tension. For that, we derive constraints on the parameters subject of the discrepancy, using CMB $C_{\ell}$ combined with cluster counts SZ s
Externí odkaz:
http://arxiv.org/abs/2112.14171
Autor:
Perenon, Louis, Martinelli, Matteo, Ilić, Stéphane, Maartens, Roy, Lochner, Michelle, Clarkson, Chris
Publikováno v:
Phys.Dark Univ. 34 (2021) 100898
Next-generation large-scale structure surveys will deliver a significant increase in the precision of growth data, allowing us to use `agnostic' methods to study the evolution of perturbations without the assumption of a cosmological model. We focus
Externí odkaz:
http://arxiv.org/abs/2105.01613
Publikováno v:
Phys. Rev. D 104, 023522 (2021)
The present epoch of accelerated cosmic expansion is supposed to be driven by an unknown constituent called dark energy, which in the standard model takes the form of a cosmological constant, characterized by a constant equation of state w=-1. An int
Externí odkaz:
http://arxiv.org/abs/2104.15091
Autor:
Blanchard, Alain, Ilić, Stéphane
Publikováno v:
A&A, 656, A75 (2021)
The excellent measurements of the cosmic microwave background (CMB) fluctuations by Planck allow us to tightly constrain the amplitude of matter fluctuations at redshift $\sim 1100$ in the $\Lambda$-cold dark matter ($\Lambda$CDM) model. This amplitu
Externí odkaz:
http://arxiv.org/abs/2104.00756
Autor:
Blanchard, Alain, Éric, Aubourg, Brax, Philippe, Castender, Francisco J., Codis, Sandrine, Escoffier, Stéphanie, Dournac, Fabien, Ferté, Agnès, Finelli, Fabio, Fosalba, Pablo, Gangler, Emmanuel, Gontcho, A Gontcho Satya, Hawken, Adam, Ilić, Stéphane, Kneib, Jean-Paul, Kunz, Martin, Lavaux, Guilhem, Fèvre, Olivier Le, Lesgourgues, Julien, Mellier, Yannick, Neveu, Jérémy, Rasera, Yann, Renault, Cécile, Ricci, Marina, Sakr, Ziad, Sanchez, Norma G., Tutusaus, Isaac, Yahia-Cherif, Safir
Publikováno v:
Experimental Astronomy, Volume 51, Issue 3, p.1623-1640 (2021)
Today, thanks in particular to the results of the ESA Planck mission, the concordance cosmological model appears to be the most robust to describe the evolution and content of the Universe from its early to late times. It summarizes the evolution of
Externí odkaz:
http://arxiv.org/abs/2102.03931