Publications related to De Sitter universe

XXXIV. The effect of linear redshift-space distortions in photometric galaxy clustering and its cross-correlation with cosmic shear

Frédéric Courbin, Georges Meylan, Gianluca Castignani, Maurizio Martinelli, Malte Tewes, Slobodan Ilic, Alessandro Pezzotta, Yi Wang, Richard Massey, Fabio Finelli, Marcello Farina

Context. The cosmological surveys that are planned for the current decade will provide us with unparalleled observations of the distribution of galaxies on cosmic scales, by means of which we can probe the underlying large-scale structure (LSS) of the Univ ...

Edp Sciences S A2024

Heuristic Estimation of the Vacuum Energy Density of the Universe: Part I—Analysis Based on Time Domain Electromagnetic Radiation

Marcos Rubinstein, Farhad Rachidi-Haeri

In this paper, an inequality satisfied by the vacuum energy density of the universe is derived using an indirect and heuristic procedure. The derivation is based on a proposed thought experiment, according to which an electron is accelerated to a constant ...

2023

Euclid preparation XXIV. Calibration of the halo mass function in λ(ν)CDM cosmologies

Frédéric Courbin, Georges Meylan, Gianluca Castignani, Austin Chandler Peel, Maurizio Martinelli, Slobodan Ilic, Yi Wang, Fabio Finelli, Marcello Farina

Euclid's photometric galaxy cluster survey has the potential to be a very competitive cosmological probe. The main cosmological probe with observations of clusters is their number count, within which the halo mass function (HMF) is a key theoretical quanti ...

EDP SCIENCES S A2023

The Källén-Lehmann representation in de Sitter spacetime

Manuel Loparco, Kamran Salehi Vaziri

We study two-point functions of symmetric traceless local operators in the bulk of de Sitter spacetime. We derive the Kallen-Lehmann spectral decomposition for any spin and show that unitarity implies its spectral densities are nonnegative. In addition, we ...

New York2023

ShapePipe: A new shape measurement pipeline and weak-lensing application to UNIONS/CFIS data

Jean-Luc Starck, Austin Chandler Peel

Context. The Ultraviolet Near-Infrared Optical Northern Survey (UNIONS) is an ongoing collaboration that will provide the largest deep photometric survey of the northern sky in four optical bands to date. As part of this collaboration, the Canada-France Im ...

EDP SCIENCES S A2022

De la contre-productivité globale. La critique de la mobilité et la crise du coronavirus

Alexandre André Robert Rigal

Alors qu’au début du mois d’avril 2020, plus de la moitié des habitants de la planète sont confinés, il n’a jamais été aussi nécessaire d’interroger le rôle de notre système global de mobilité. Dans cette perspective, les critiques de la mobilité des année ...

2020

The impact of the fiducial cosmology assumption on BAO distance scale measurements

Cheng Zhao, Paul Carter

Standard analysis pipelines for measurements of Baryon Acoustic Oscillations (BAO) in galaxy surveys make use of a fiducial cosmological model to guide the data compression required to transform from observed redshifts and angles to the measured angular an ...

OXFORD UNIV PRESS2020

Euclid preparation: VII. Forecast validation for Euclid cosmological probes

Georges Meylan, Jean-Luc Starck, Maurizio Martinelli, Slobodan Ilic, Yi Wang, Richard Massey

Aims. The Euclid space telescope will measure the shapes and redshifts of galaxies to reconstruct the expansion history of the Universe and the growth of cosmic structures. The estimation of the expected performance of the experiment, in terms of predicted ...

EDP SCIENCES S A2020

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De Sitter universe

Heuristic Estimation of the Vacuum Energy Density of the Universe: Part II-Analysis Based on Frequency Domain Electromagnetic Radiation

XXXIV. The effect of linear redshift-space distortions in photometric galaxy clustering and its cross-correlation with cosmic shear

Heuristic Estimation of the Vacuum Energy Density of the Universe: Part I—Analysis Based on Time Domain Electromagnetic Radiation

Cosmological constraints with the linear point from the BOSS survey

Euclid preparation XXIV. Calibration of the halo mass function in λ(ν)CDM cosmologies

The Källén-Lehmann representation in de Sitter spacetime

ShapePipe: A new shape measurement pipeline and weak-lensing application to UNIONS/CFIS data

De la contre-productivité globale. La critique de la mobilité et la crise du coronavirus

The impact of the fiducial cosmology assumption on BAO distance scale measurements

Euclid preparation: VII. Forecast validation for Euclid cosmological probes

Graph Chatbot

Chat with Graph Search

Heuristic Estimation of the Vacuum Energy Density of the Universe: Part II-Analysis Based on Frequency Domain Electromagnetic Radiation

Cosmological constraints with the linear point from the BOSS survey

Heuristic Estimation of the Vacuum Energy Density of the Universe: Part I—Analysis Based on Time Domain Electromagnetic Radiation

XXXIV. The effect of linear redshift-space distortions in photometric galaxy clustering and its cross-correlation with cosmic shear

The Källén-Lehmann representation in de Sitter spacetime

ShapePipe: A new shape measurement pipeline and weak-lensing application to UNIONS/CFIS data

Euclid preparation XXIV. Calibration of the halo mass function in λ(ν)CDM cosmologies

De la contre-productivité globale. La critique de la mobilité et la crise du coronavirus

Euclid preparation: VII. Forecast validation for Euclid cosmological probes

The impact of the fiducial cosmology assumption on BAO distance scale measurements