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Nagam BC, Acevedo Barroso JA, Wilde Michael J, Andika IT et autres
© 2025 The Authors. Several new galaxy-galaxy strong gravitational lenses have been detected in the early release observations (ERO) from Euclid. The all-sky survey is expected to find 170 000 new systems, which are expected to greatly enhancing studies of dark matter …
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Bergamini P, Meneghetti M, Angora G, Bazzanini L et autres
© The Authors 2025.We present HST2EUCLID, a novel Python code to generate Euclid realistic mock images in the HE, JE, YE, and IE photometric bands based on panchromatic Hubble Space Telescope observations. The software was used to create a simulated database of …
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Pearce-Casey R, Nagam BC, Wilde Michael J, Busillo V et autres
© The Authors 2025.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 scientists …
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Banados E, Le Brun V, Belladitta S, Momcheva I et autres
© 2025 The Author(s). We demonstrate the potential of Euclid 's slitless spectroscopy to discover high-redshift (5$]]>) quasars and their main photometric contaminant, ultracool dwarfs. Sensitive infrared spectroscopy from space is able to efficiently identify both populations, as demonstrated by Euclid Near-Infrared …
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Kovacic I, Baes M, Nersesian A, Andreadis N et autres
© The Authors 2025.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 constrain …
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A. Humphrey, Cunha PAC, Bisigello L, Tortora C et autres
© The Authors 2025.The Euclid Space Telescope will image about 14 000 deg2 of the extragalactic sky at visible and near-infrared wavelengths, providing a dataset of unprecedented size and richness that will facilitate a multitude of studies into the evolution of galaxies. …
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Ellien A, Montes M, Ahad SL, Dimauro P et autres
© The Authors 2025.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. Our …
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Acevedo Barroso JA, O'riordan CM, B. Clément, Tortora C et autres
© The Authors 2025. We investigated the ability of the Euclid telescope to detect galaxy-scale gravitational lenses. To do so, we performed a systematic visual inspection of the 0.7 deg2 Euclid Early Release Observations data towards the Perseus cluster using both the …
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O'riordan CM, Oldham LJ, Nersesian A, Li T et autres
© The Authors 2025.We report the discovery of a complete Einstein ring around the elliptical galaxy NGC 6505, at z = 0.042. This is the first strong gravitational lens discovered in Euclid and the first in an NGC object from any survey. …
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George K, Boselli A, Cuillandre J-C, Kummel M et autres
© 2025 EDP Sciences. All rights reserved.Euclid is delivering optical and near-infrared imaging data over 14 000 deg2 on the sky at spatial resolution and surface brightness levels that can be used to understand the morphological transformation of galaxies within groups and …
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Linke L, Unruh S, Wittje A, Schrabback T et autres
© The Authors 2025.Cosmic shear is a powerful probe of cosmological models and the transition from current Stage-III surveys such as the Kilo-Degree Survey (KiDS) to the increased area and redshift range of Stage IV surveys such as Euclid will significantly increase …
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Lesgourgues J, Schwagereit J, Bucko J, Parimbelli G et autres
© The Authors 2025. The Euclid mission of the European Space Agency will provide weak gravitational lensing and galaxy clustering surveys that can be used to constrain the standard cosmological model and its extensions, with an opportunity to test the properties of …