Publications associées à Accélération de l'expansion de l'Univers

SLITRONOMY: Towards a fully wavelet-based strong lensing inversion technique

Frédéric Courbin, Aymeric Alexandre Galan, Austin Chandler Peel, Rémy Elie Joseph

Strong gravitational lensing provides a wealth of astrophysical information on the baryonic and dark matter content of galaxies. It also serves as a valuable cosmological probe by allowing us to measure the Hubble constant independently of other methods. T ...

EDP SCIENCES S A2021

Does concentration drive the scatter in the stellar-to-halo mass relation of galaxy clusters?

Jean-Paul Richard Kneib, Huanyuan Shan, Jun Zhang, Wei Cui

Concentration is one of the key dark matter halo properties that could drive the scatter in the stellar-to-halo mass relation of massive clusters. We derive robust photometric stellar masses for a sample of brightest central galaxies (BCGs) in SDSS REDMAPP ...

OXFORD UNIV PRESS2021

Euclid preparation: XI. Mean redshift determination from galaxy redshift probabilities for cosmic shear tomography

Gianluca Castignani, Yi Wang, Richard Massey, Fabio Finelli

The analysis of weak gravitational lensing in wide-field imaging surveys is considered to be a major cosmological probe of dark energy. Our capacity to constrain the dark energy equation of state relies on an accurate knowledge of the galaxy mean redshift ...

2021

Positive moments for scattering amplitudes

Riccardo Rattazzi, Francesco Riva, Brando Bellazzini, Marc Riembau Saperas

We find the complete set of conditions satisfied by the forward 2 -> 2 scattering amplitude in unitary and causal theories. These are based on an infinite set of energy dependent quantities (the arcs) which are dispersively expressed as moments of a positi ...

AMER PHYSICAL SOC2021

Measuring accretion disk sizes of lensed quasars with microlensing time delay in multi-band light curves

Frédéric Courbin, Martin Raoul Robert Millon, Hung-Hsu Chan, Vivien François Bonvin, Karina Alexandra Rojas Olate

Time-delay cosmography in strongly lensed quasars offers an independent way of measuring the Hubble constant, H-0. However, it has been proposed that the combination of microlensing and source-size effects, also known as microlensing time delay, can potent ...

EDP SCIENCES S A2021

A conveyor belt experimental setup to study the internal dynamics of granular avalanches

Christophe Ancey, Tomás Alfredo Trewhela Palacios

This paper shows how a conveyor belt setup can be used to study the dynamics of stationary granular flows. To visualise the flow within the granular bulk and, in particular, determine its composition and the velocity field, we used the refractive index mat ...

SPRINGER2021

Large particle segregation in two-dimensional sheared granular flows

Christophe Ancey, Tomás Alfredo Trewhela Palacios

We studied the segregation of single large intruder particles in monodisperse granular materials. Experiments were carried out in a two-dimensional shear cell using different intruder and media diameters, whose quotient defined a size ratio R that ranged f ...

2021

Efficacy of SCMs to mitigate ASR in systems with higher alkali contents assessed by pore solution method

Karen Scrivener, Lionel Sofia, Marie Joshua Tapas

This study demonstrates the efficacy of supplementary cementitious materials (SCMs) to mitigate alkali-silica reaction (ASR) even when used in conjunction with cement of higher alkali contents (up to 1% Na2Oeq). The expansion of concrete prisms was studied ...

PERGAMON-ELSEVIER SCIENCE LTD2021

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

Chattez avec Graph Search

Posez n’importe quelle question sur les cours, conférences, exercices, recherches, actualités, etc. de l’EPFL ou essayez les exemples de questions ci-dessous.

AVERTISSEMENT : Le chatbot Graph n'est pas programmé pour fournir des réponses explicites ou catégoriques à vos questions. Il transforme plutôt vos questions en demandes API qui sont distribuées aux différents services informatiques officiellement administrés par l'EPFL. Son but est uniquement de collecter et de recommander des références pertinentes à des contenus que vous pouvez explorer pour vous aider à répondre à vos questions.

Accélération de l'expansion de l'Univers

SLITRONOMY: Towards a fully wavelet-based strong lensing inversion technique

Advances in constraining intrinsic alignment models with hydrodynamic simulations

Does concentration drive the scatter in the stellar-to-halo mass relation of galaxy clusters?

Euclid preparation: XI. Mean redshift determination from galaxy redshift probabilities for cosmic shear tomography

Positive moments for scattering amplitudes

Measuring accretion disk sizes of lensed quasars with microlensing time delay in multi-band light curves

A conveyor belt experimental setup to study the internal dynamics of granular avalanches

Large particle segregation in two-dimensional sheared granular flows

Efficacy of SCMs to mitigate ASR in systems with higher alkali contents assessed by pore solution method

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

Graph Chatbot

Chattez avec Graph Search

Does concentration drive the scatter in the stellar-to-halo mass relation of galaxy clusters?

SLITRONOMY: Towards a fully wavelet-based strong lensing inversion technique

Positive moments for scattering amplitudes

Large particle segregation in two-dimensional sheared granular flows

Advances in constraining intrinsic alignment models with hydrodynamic simulations

Euclid preparation: XI. Mean redshift determination from galaxy redshift probabilities for cosmic shear tomography

Measuring accretion disk sizes of lensed quasars with microlensing time delay in multi-band light curves

A conveyor belt experimental setup to study the internal dynamics of granular avalanches

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

Efficacy of SCMs to mitigate ASR in systems with higher alkali contents assessed by pore solution method