Publications related to The hierarchical cosmic web and assembly bias

Related publications (12)

J1721+8842: The first Einstein zigzag lens

We report the discovery of the first example of an Einstein zigzag lens, an extremely rare lensing configuration. In this system, J1721+8842, six images of the same background quasar are formed by two intervening galaxies, one at redshift z(1) = 0.184 and ...

EDP SCIENCES S A2025

euclid Preparation: Lxiii. Simulations and Non-linearities Beyond Lambda Cold Dark Matter. 2. Results From Non-standard Simulations

Frédéric Courbin, Georges Meylan

The Euclid mission will measure cosmological parameters with unprecedented precision. To distinguish between cosmological models, it is essential to generate realistic mock observables from cosmological simulations that were run in both the standard Lambda ...

EDP SCIENCES S A2025

DESI 2024 VII: cosmological constraints from the full-shape modeling of clustering measurements

Antoine Philippe Jacques Rocher, Rafaela Gsponer

We present cosmological results from the measurement of clustering of galaxy, quasar and Lyman-α forest tracers from the first year of observations with the Dark Energy Spectroscopic Instrument (DESI Data Release 1). We adopt the full-shape (FS) modeling o ...

2025

Euclid: Early Release Observations – NISP-only sources and the search for luminous z = 6–8 galaxies

Frédéric Courbin, Georges Meylan

This paper presents a search for high redshift galaxies from the Euclid Early Release Observations program ‘Magnifying Lens.’ The 1.5 deg2 area covered by the twin Abell lensing cluster fields is comparable in size to the few other deep near-infrared surve ...

2025

CAPERS Observations of Two UV-bright Galaxies at z > 10. More Evidence for Bursting Star Formation in the Early Universe

Michaela Hirschmann

We present the first results from the CANDELS-Area Prism Epoch of Reionization Survey (CAPERS), utilizing PRISM observations with the JWST/NIRSpec microshutter assembly in the PRIMER-UDS field. With just 14% of the total planned data volume, we spectroscop ...

2025

Observation of a Spectral Hardening in Cosmic Ray Boron Spectrum with the DAMPE Space Mission

Chiara Perrina, Jennifer Maria Frieden

Secondary cosmic ray fluxes are important probes of the propagation and interaction of high-energy particles in the Galaxy. Recent measurements of primary and secondary cosmic ray nuclei have revealed unexpected spectral features that demand a deeper under ...

American Physical Society (APS)2025

Mass and light in galaxy clusters: The case of Abell 370

Benjamin Emmanuel Nicolas Beauchesne

In the cold dark matter (CDM) paradigm, an association between the hypothetic dark matter (DM) and its stellar counterpart is expected. However, parametric strong-lensing studies of galaxy clusters often display misleading features: DM components on the gr ...

EDP SCIENCES S A2024

Euclid preparation XLI. Galaxy power spectrum modelling in real space

Frédéric Courbin, Georges Meylan

We investigate the accuracy of the perturbative galaxy bias expansion in view of the forthcoming analysis of the Euclid spectroscopic galaxy samples. We compare the performance of a Eulerian galaxy bias expansion using state-of-the-art prescriptions from t ...

2024

XVI. Measurement of the Hubble constant from the lensed quasar WGD 2038–4008

Frédéric Courbin

Time-delay cosmography is a powerful technique to constrain cosmological parameters, particularly the Hubble constant (H0). The TDCOSMO Collaboration is performing an ongoing analysis of lensed quasars to constrain cosmology using this method. In this work ...

2024

Preparing for low surface brightness science with the Vera C. Rubin Observatory: a comparison of observable and simulated intracluster light fractions

Yannick Michael Bahé

Intracluster light (ICL) provides an important record of the interactions galaxy clusters have undergone. However, we are limited in our understanding by our measurement methods. To address this, we measure the fraction of cluster light that is held in the ...

Oxford Univ Press2024

Gravitation and the Universe from large scale-structures The GAUSS mission concept Mapping the cosmic web up to the reionization era

Jean-Paul Richard Kneib

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 matter ...

SPRINGER2021

Euclid: Forecast constraints on the cosmic distance duality relation with complementary external probes

Georges Meylan

Context. In metric theories of gravity with photon number conservation, the luminosity and angular diameter distances are related via the Etherington relation, also known as the distance duality relation (DDR). A violation of this relation would rule out t ...

EDP SCIENCES S A2020