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View article: Euclid: Early Release Observations -- A combined strong and weak lensing solution for Abell 2390 beyond its virial radius
Euclid: Early Release Observations -- A combined strong and weak lensing solution for Abell 2390 beyond its virial radius Open
Euclid/ is currently mapping the distribution of matter in the Universe in detail via the weak lensing signature of billions of distant galaxies. The weak lensing signal is most prominent around galaxy clusters and can extend up to distanc…
View article: Euclid Quick Data Release (Q1). Characteristics and limitations of the spectroscopic measurements
Euclid Quick Data Release (Q1). Characteristics and limitations of the spectroscopic measurements Open
The spectroscopy processing function (SPE PF) of the Euclid pipeline is dedicated to the automatic analysis of 1D spectra to determine redshifts, line fluxes, and spectral classifications. The first Euclid Quick Data Release (Q1) delivers …
View article: Euclid preparation. Cosmology Likelihood for Observables in Euclid (CLOE). 5. Extensions beyond the standard modelling of theoretical probes and systematic effects
Euclid preparation. Cosmology Likelihood for Observables in Euclid (CLOE). 5. Extensions beyond the standard modelling of theoretical probes and systematic effects Open
Euclid is expected to establish new state-of-the-art constraints on extensions beyond the standard LCDM cosmological model by measuring the positions and shapes of billions of galaxies. Specifically, its goal is to shed light on the nature…
View article: Euclid: Discovery of bright $z\simeq7$ Lyman-break galaxies in UltraVISTA and Euclid COSMOS
Euclid: Discovery of bright $z\simeq7$ Lyman-break galaxies in UltraVISTA and Euclid COSMOS Open
We present a search for $z\simeq7$ Lyman-break galaxies using the $1.72 \, \rm{deg}^2$ near-infrared UltraVISTA survey in the COSMOS field, reaching $5\,σ$ depths in $Y$ of 26.2. We incorporate deep optical and Spitzer imaging for a full s…
View article: Euclid preparation. LXXIV. Euclidised observations of Hubble Frontier Fields and CLASH galaxy clusters
Euclid preparation. LXXIV. Euclidised observations of Hubble Frontier Fields and CLASH galaxy clusters Open
We present HST2EUCLID, a novel Python code to generate Euclid realistic mock images in the $H_{\rm E}$, $J_{\rm E}$, $Y_{\rm E}$, and $I_{\rm E}$ photometric bands based on panchromatic Hubble Space Telescope observations. The software was…
View article: Euclid Quick Data Release (Q1). The strong-lensing discovery engine B. Early strong-lens candidates from the visual inspection of galaxies with a high-velocity dispersion
Euclid Quick Data Release (Q1). The strong-lensing discovery engine B. Early strong-lens candidates from the visual inspection of galaxies with a high-velocity dispersion Open
We present a search for strong gravitational lenses in Euclid imaging with a high stellar velocity dispersion (sigmav>180,̨ms) reported by SDSS and DESI. We performed expert visual inspection and classification of $11,660$ Euclid images. We…
View article: Euclid preparation. Establishing the quality of the 2D reconstruction of the filaments of the cosmic web with DisPerSE using Euclid photometric redshifts
Euclid preparation. Establishing the quality of the 2D reconstruction of the filaments of the cosmic web with DisPerSE using Euclid photometric redshifts Open
Cosmic filaments are prominent structures of the matter distribution of the Universe. Modern detection algorithms are an efficient way to identify filaments in large-scale observational surveys of galaxies. Many of these methods were origi…
View article: Euclid preparation. LXXIV. Euclidised observations of Hubble Frontier Fields and CLASH galaxy clusters
Euclid preparation. LXXIV. Euclidised observations of Hubble Frontier Fields and CLASH galaxy clusters Open
We present ̋S, a novel Python code to generate Euclid realistic mock images in the ̋E and photometric bands based on panchromatic Hubble Space Telescope observations. The software was used to create a simulated database of Euclid images for …
View article: Euclid Quick Data Release (Q1). A probabilistic classification of quenched galaxies
Euclid Quick Data Release (Q1). A probabilistic classification of quenched galaxies Open
Investigating what drives the quenching of star formation in galaxies is key to understanding their evolution. The Euclid mission will provide rich spatial and spectral data from optical to infrared wavelengths for millions of galaxies, an…
View article: Euclid preparation. Simulating thousands of Euclid spectroscopic skies
Euclid preparation. Simulating thousands of Euclid spectroscopic skies Open
We present two extensive sets of 3500+1000 simulations of dark matter haloes on the past light cone, and two corresponding sets of simulated (`mock') galaxy catalogues that represent the Euclid spectroscopic sample. The simulations were pr…
View article: Euclid VI. NISP-P optical ghosts
Euclid VI. NISP-P optical ghosts Open
The Near-Infrared Spectrometer and Photometer (NISP) onboard Euclid includes several optical elements in its path, which introduce artefacts into the data from non-nominal light paths. To ensure uncontaminated source photometry, these arte…
View article: <i>Euclid</i>: Early Release Observations of diffuse stellar structures and globular clusters as probes of the mass assembly of galaxies in the Dorado group
<i>Euclid</i>: Early Release Observations of diffuse stellar structures and globular clusters as probes of the mass assembly of galaxies in the Dorado group Open
Deep surveys have helped to unveil the history of past and present galaxy mergers, and, in particular, uncovering their tidal debris and co-located globular clusters (GCs). Euclid ’s unique combination of capabilities (spatial resolution, …
View article: Euclid preparation. Full-shape modelling of 2-point and 3-point correlation functions in real space
Euclid preparation. Full-shape modelling of 2-point and 3-point correlation functions in real space Open
We investigate the accuracy and range of validity of the perturbative model for the 2-point (2PCF) and 3-point (3PCF) correlation functions in real space in view of the forthcoming analysis of the Euclid mission spectroscopic sample. We ta…
View article: Euclid Quick Data Release (Q1). From spectrograms to spectra: The SIR spectroscopic processing function
Euclid Quick Data Release (Q1). From spectrograms to spectra: The SIR spectroscopic processing function Open
The Euclid space mission aims to investigate the nature of dark energy and dark matter by mapping the large-scale structure of the Universe. A key component of Euclid's observational strategy is slitless spectroscopy, which is conducted us…
View article: Euclid preparation: The NISP spectroscopy channel, on ground performance and calibration
Euclid preparation: The NISP spectroscopy channel, on ground performance and calibration Open
ESA's Euclid cosmology mission relies on the very sensitive and accurately calibrated spectroscopy channel of the Near-Infrared Spectrometer and Photometer (NISP). With three operational grisms in two wavelength intervals, NISP provides di…
View article: Euclid preparation. Constraining parameterised models of modifications of gravity with the spectroscopic and photometric primary probes
Euclid preparation. Constraining parameterised models of modifications of gravity with the spectroscopic and photometric primary probes Open
The Euclid mission has the potential to understand the fundamental physical nature of late-time cosmic acceleration and, as such, of deviations from the standard cosmological model, LCDM. In this paper, we focus on model-independent method…
View article: Euclid Quick Data Release (Q1). A first view of the star-forming main sequence in the Euclid Deep Fields
Euclid Quick Data Release (Q1). A first view of the star-forming main sequence in the Euclid Deep Fields Open
The star-forming main sequence (SFMS) is a tight relation observed between stellar masses and star formation rates (SFR) in a population of galaxies. This relation is observed at different redshifts, in various morphological, and environme…
View article: Euclid preparation. The impact of redshift interlopers on the two-point correlation function analysis
Euclid preparation. The impact of redshift interlopers on the two-point correlation function analysis Open
The Euclid survey aims to measure the spectroscopic redshift of emission-line galaxies by identifying the H$\,α$ line in their slitless spectra. This method is sensitive to the signal-to-noise ratio of the line, as noise fluctuations or ot…
View article: <i>Euclid</i>: Early Release Observations
<i>Euclid</i>: Early Release Observations Open
Intracluster light (ICL) provides a record of the dynamical interactions undergone by clusters, giving clues on cluster formation and evolution. Here, we analyse the properties of ICL in the massive cluster Abell 2390 at redshift z = 0.228…
View article: <i>Euclid</i> preparation
<i>Euclid</i> preparation Open
We study the constraint on f ( R ) gravity that can be obtained by photometric primary probes of the Euclid mission. Our focus is the dependence of the constraint on the theoretical modelling of the nonlinear matter power spectrum. In the …
View article: Euclid Quick Data Release (Q1) The Strong Lensing Discovery Engine B -- Early strong lens candidates from visual inspection of high velocity dispersion galaxies
Euclid Quick Data Release (Q1) The Strong Lensing Discovery Engine B -- Early strong lens candidates from visual inspection of high velocity dispersion galaxies Open
We present a search for strong gravitational lenses in Euclid imaging with high stellar velocity dispersion ($\sigma_\nu > 180$ km/s) reported by SDSS and DESI. We performed expert visual inspection and classification of $11\,660$ \Euclid …
View article: Euclid Quick Data Release (Q1). The Strong Lensing Discovery Engine E -- Ensemble classification of strong gravitational lenses: lessons for Data Release 1
Euclid Quick Data Release (Q1). The Strong Lensing Discovery Engine E -- Ensemble classification of strong gravitational lenses: lessons for Data Release 1 Open
The Euclid Wide Survey (EWS) is expected to identify of order $100\,000$ galaxy-galaxy strong lenses across $14\,000$deg$^2$. The Euclid Quick Data Release (Q1) of $63.1$deg$^2$ Euclid images provides an excellent opportunity to test our l…
View article: Euclid Quick Data Release (Q1). First Euclid statistical study of the active galactic nuclei contribution fraction
Euclid Quick Data Release (Q1). First Euclid statistical study of the active galactic nuclei contribution fraction Open
Active galactic nuclei (AGN) play a key role in galaxy evolution but are challenging to identify due to their varied observational signatures. Furthermore, understanding their impact requires quantifying their strength relative to their ho…
View article: Euclid Quick Data Release (Q1) First study of red quasars selection
Euclid Quick Data Release (Q1) First study of red quasars selection Open
Red quasars constitute an important but elusive phase in the evolution of supermassive black holes, where dust obscuration can significantly alter their observed properties. They have broad emission lines, like other quasars, but their opt…
View article: <i>Euclid</i> preparation
<i>Euclid</i> preparation Open
Measurements of galaxy clustering are affected by redshift-space distortions (RSDs). Peculiar velocities, gravitational lensing, and other light-cone projection effects modify the observed redshifts, fluxes, and sky positions of distant li…
View article: <i>Euclid</i>: Early Release Observations – Dwarf galaxies in the Perseus galaxy cluster
<i>Euclid</i>: Early Release Observations – Dwarf galaxies in the Perseus galaxy cluster Open
We make use of the unprecedented depth, spatial resolution, and field of view of the Euclid Early Release Observations (EROs) of the Perseus galaxy cluster to detect and characterise the dwarf galaxy population in this massive system. Usin…
View article: <i>Euclid</i>
<i>Euclid</i> Open
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 …
View article: Euclid: Finding strong gravitational lenses in the Early Release Observations using convolutional neural networks
Euclid: Finding strong gravitational lenses in the Early Release Observations using convolutional neural networks Open
The Early Release Observations (ERO) from Euclid have detected several new galaxy-galaxy strong gravitational lenses, with the all-sky survey expected to find 170,000 new systems, greatly enhancing studies of dark matter, dark energy, and …
View article: <i>Euclid</i> preparation
<i>Euclid</i> preparation Open
The Euclid mission is generating a vast amount of imaging data in four broadband filters at a high angular resolution. This data will allow for the detailed study of mass, metallicity, and stellar populations across galaxies that will cons…
View article: <i>Euclid</i> preparation
<i>Euclid</i> preparation Open
In this paper we present the framework for measuring angular power spectra in the Euclid mission. The observables in galaxy surveys, such as galaxy clustering and cosmic shear, are not continuous fields, but discrete sets of data, obtained…