Publications related to Comparing Compressed and Full-Modeling analyses with FOLPS: implications for DESI 2024 and beyond

Related publications (18)

Euclid I. Overview of the Euclid mission

Jean-Paul Richard Kneib, Frédéric Courbin, Georges Meylan, Pascale Jablonka, Michaela Hirschmann, Yves Revaz, Austin Chandler Peel, Lucie Anemone Scharré, Bastien Clément

The current standard model of cosmology successfully describes a variety of measurements, but the nature of its main ingredients, dark matter and dark energy, remains unknown. Euclid is a medium-class mission in the Cosmic Vision 2015–2025 programme of the ...

2025

Euclid V. The Flagship galaxy mock catalogue: A comprehensive simulation for the Euclid mission

Frédéric Courbin, Georges Meylan

We present the Flagship galaxy mock, a simulated catalogue of billions of galaxies designed to support the scientific exploitation of the Euclid mission. Euclid is a medium-class mission of the European Space Agency optimised to determine the properties of ...

2025

Virgo Filaments. V. Disrupting the Baryon Cycle in the NGC 5364 Galaxy Group

Pascale Jablonka, Yannick Michael Bahé, Damien Louis Alexandre Spérone-Longin, Gautam Ramakrishnan Nagaraj

The Virgo Filament Survey (VFS) is a comprehensive study of galaxies that reside in the extended filamentary structures surrounding the Virgo Cluster, out to 12 virial radii. The primary goal is to characterize all of the dominant baryonic components withi ...

2025

A comparison of effective field theory models of redshift space galaxy power spectra for DESI 2024 and future surveys

Antoine Philippe Jacques Rocher

In preparation for the next generation of galaxy redshift surveys, and in particular the year-one data release from the Dark Energy Spectroscopic Instrument (DESI), we investigate the consistency of a variety of effective field theory models that describe ...

IOP Publishing Ltd2025

Here There Be (dusty) Monsters: High-redshift Active Galactic Nuclei Are Dustier Than Their Hosts

Michaela Hirschmann

JWST spectroscopy has discovered a population of z greater than or similar to 3.5 galaxies with broad Balmer emission lines and narrow forbidden lines that are consistent with hosting active galactic nuclei (AGN). Many of these systems, now known as "littl ...

IOP Publishing Ltd2025

Euclid: Searches for strong gravitational lenses using convolutional neural nets in Early Release Observations of the Perseus field

Georges Meylan, Benjamin Yvan Alexandre Clement, Olivia Mueller

The Euclid Wide Survey (EWS) is predicted to find approximately 170 000 galaxy-galaxy strong lenses from its lifetime observation of 14 000 deg2 of the sky. Detecting this many lenses by visual inspection with professional astronomers and citizen scientist ...

2025

Kontsevich-Segal criterion in the no-boundary state constrains anisotropy

Oliver Paul C. Janssen

We show that the Kontsevich-Segal-Witten (KSW) criterion applied to the no-boundary state constrains anisotropic deformations of de Sitter space. We consider squashed S3 and S1×S2 boundaries and find that, in both models, the KSW criterion excludes a signi ...

2025

Characterising the z ≈ 7.66 Type-II AGN candidate SMACS S06355 using BEAGLE-AGN and JWST NIRSpec/NIRCam

Michaela Hirschmann, Adèle Marie Françoise Plat

The presence of Active Galactic Nuclei (AGN) in low mass (M⋆ ≲ 109 M⊙) galaxies at high redshift has been established, and it is important to characterise these objects and the impact of their feedback on the host galaxies. In this paper we apply the Spect ...

Oxford University Press (OUP)2025

Euclid preparation: XLII. A unified catalogue-level reanalysis of weak lensing by galaxy clusters in five imaging surveys

Frédéric Courbin, Georges Meylan, Austin Chandler Peel

Precise and accurate mass calibration is required to exploit galaxy clusters as astrophysical and cosmological probes in the Euclid era. Systematic errors in lensing signals by galaxy clusters can be empirically estimated by comparing different surveys wit ...

2024

BEAGLE-AGN I: simultaneous constraints on the properties of gas in star-forming and AGN narrow-line regions in galaxies

Michaela Hirschmann

We present the addition of nebular emission from the narrow-line regions (NLR) surrounding active galactic nuclei (AGNs) to BEAGLE (BayEsian Analysis of GaLaxy sEds). Using a set of idealized spectra, we fit to a set of observables (emission-line ratios an ...

Oxford Univ Press2024

Euclid preparation XXXIII. Characterization of convolutional neural networks for the identification of galaxy-galaxy strong-lensing events

Frédéric Courbin, Georges Meylan, Georgios Vernardos, Benjamin Yvan Alexandre Clement

Forthcoming imaging surveys will increase the number of known galaxy-scale strong lenses by several orders of magnitude. For this to happen, images of billions of galaxies will have to be inspected to identify potential candidates. In this context, deep-le ...

Edp Sciences S A2024

The diverse star formation histories of early massive, quenched galaxies in modern galaxy formation simulations

Michaela Hirschmann

We present a comprehensive study of the star formation histories of massive-quenched galaxies at z = 3 in three semi-analytical models (SHARK, GAEA, GALFORM) and three cosmological hydrodynamical simulations (EAGLE, ILLUSTRISTNG, SIMBA). We study the predi ...

OXFORD UNIV PRESS2024

Cosmic evolution of the Faraday rotation measure in the intracluster medium of galaxy clusters

Salim Bennouna, Abhijit Bhausaheb Bendre, Yoan Rappaz

Context. Radio observations have revealed magnetic fields in the intracluster medium (ICM) of galaxy clusters, and their energy density is nearly in equipartition with the turbulent kinetic energy. This suggests magnetic field amplification by dynamo proce ...

2024

Relation between the geometric shape and rotation of Galactic globular clusters

Richard Irving Anderson, Mauricio Cruz Reyes

We homogeneously measured the elliptical shapes of 163 globular clusters (GCs) using the on-sky distribution of their cluster members and the third data release of the ESA mission Gaia (DR3). The astrometry enables the differentiation of stars within clust ...

2024

A luminous and young galaxy at z = 12.33 revealed by a JWST/MIRI detection of Hα and [O iii]

Michaela Hirschmann

The James Webb Space Telescope has discovered a surprising population of bright galaxies in the very early Universe (≲500 Myr after the Big Bang) that is hard to explain with conventional galaxy-formation models and whose physical properties are not fully ...

2024

The impact of stochastic modelling on the predictive power of galaxy formation simulations

Yannick Michael Bahé

All modern galaxy formation models employ stochastic elements in their sub-grid prescriptions to discretize continuous equations across the time domain. In this paper, we investigate how the stochastic nature of these models, notably star formation, black ...

2023

Discovery of two bright high-redshift gravitationally lensed quasars revealed by Gaia

Cameron Alexander Campbell Lemon

We present the discovery and preliminary characterisation of two high-redshift gravitationally lensed quasar systems in Gaia Data Release 2 (DR2). Candidates with multiple close-separation Gaia detections and quasar-like colours in WISE, Pan-STARRS, and DE ...

2022

Hypermagnetogenesis from axion inflation: Model-independent estimates

Oleksandr Sobol

Axion inflation coupled to the Standard Model (SM) hypercharge gauge sector represents an attractive scenario for the generation of primordial hypemiagnetic fields. The description of this scenario is, however, complicated by the Schwinger effect, which gi ...

American Physical Society2022