Euclid Q1 Papers

Here is a list of the first 27 scientific papers published on 19th March 2025, date of the Euclid Q1 data release, using Euclid Q1 data. All papers are available on the Euclid Consortium portal. 

The list also includes 7 reference papers describing Euclid Q1 overview, data products and processing. 

Overview, data products and processing:

Euclid Quick Data Release (Q1): Data Release Overview,
Euclid Collaboration: Aussel et al. (2025)

Euclid Quick Data Release (Q1): VIS processing and data products,
Euclid Collaboration: McCracken et al. (2025)

Euclid Quick Data Release (Q1): NIR processing and data products,
Euclid Collaboration: Polenta et al. (2025)

Euclid Quick Data Release (Q1): From Images to Multiwavelength
Catalogues: the Euclid MERge Processing Function

Euclid Quick Data Release (Q1): Photometric redshifts and physical properties of galaxies through the PHZ processing function,
Euclid Collaboration: Tucci et al. (2025)

Euclid Quick Data Release (Q1): From spectrograms to spectra: the SIR spectroscopic processing function,
Euclid Collaboration: Copin et al. (2025)

Euclid Quick Data Release (Q1): Characteristics and limitations of the spectroscopic measurements,
Euclid Collaboration: Le Brun et al. (2025)

Scientific results using Euclid Q1 data

Euclid Quick Data Release (Q1): Exploring galaxy morphology across cosmic time through Sérsic fits,
Euclid Collaboration: Quilley et al. (2025)

Euclid Quick Data Release (Q1): First Visual Morphology Catalogue,
Euclid Collaboration: Walmsley et al. (2025b)

Euclid Quick Data Release (Q1): A first look at the fraction of bars in massive galaxies at z < 1,
Euclid Collaboration: Huertas-Company et al. (2025)

Euclid Quick Data Release (Q1): Exploring galaxy properties with a multi-modal foundation model,
Euclid Collaboration: Siudek et al. (2025)

Euclid Quick Data Release (Q1): The evolution of the passive-density and morphology-density relations betwen z = 0.25 and z = 1,
Euclid Collaboration: Cleland et al. (2025)

Euclid Quick Data Release (Q1): A first view of the star-forming main sequence in the Euclid Deep Fields,
Euclid Collaboration: Enia et al. (2025)

Euclid Quick Data Release (Q1): A probabilistic classification of quenched galaxies,
Euclid Collaboration: Corcho-Caballero et al. (2025)

Euclid Quick Data Release (Q1): Optical and near-infrared identification and classification of point-like X-ray selected sources in Q1,
Euclid Collaboration: Roster et al. (2025)

Euclid Quick Data Release (Q1): First Euclid statistical study of galaxy mergers and their connection to Active Galactic Nuclei,
Euclid Collaboration: La Marca et al. (2025)

Euclid Quick Data Release (Q1): First Euclid statistical study of the active galactic nuclei contribution fraction,
Euclid Collaboration: Margalef-Bentabol et al. (2025)

Euclid Quick Data Release (Q1): First study of red quasars selection,
Euclid Collaboration: Tarsitano et al. (2025)

Euclid Quick Data Release (Q1): The active galaxies of Euclid,
Euclid Collaboration: Matamoro Zatarain et al. (2025)

Euclid Quick Data Release (Q1): Active galactic nuclei identification using diffusion-based-based inpainting of Euclid VIS images,
Euclid Collaboration: Stevens et al. (2025)

Euclid Quick Data Release (Q1): An investigation of optically faint, red objects in the Euclid Deep Fields,
Euclid Collaboration: Girardi et al. (2025)

Euclid Quick Data Release (Q1): Extending the quest for little red dots to z < 4,
Euclid Collaboration: Bisigello et al. (2025)

Euclid Quick Data Release (Q1): The Strong Lensing Discovery Engine A – System Overview and Lens catalogue,
Euclid Collaboration: Walmsley et al. (2025a)

Euclid Quick Data Release (Q1): The Strong Lensing Discovery Engine B – Early strong lens candidates from visual inspection of high velocity dispersion galaxies,
Euclid Collaboration: Rojas et al. (2025)

Euclid Quick Data Release (Q1): The Strong Lensing Discovery Engine C – Finding Lenses with Machine Learning,
Euclid Collaboration: Lines et al. (2025)

Euclid Quick Data Release (Q1) The strong lensing discovery engine D – double-source-plane lens candidates,
Euclid Collaboration: Li et al. (2025)

Euclid Quick Data Release (Q1): The strong lensing discovery engine E – ensemble classification of strong gravitational lenses: lessons for Data Release 1,
Euclid Collaboration: Holloway et al. (2025)

Euclid Quick Data Release (Q1): LEMON -- Lens Modelling with Neural networks. Automated and fast modelling of Euclid gravitational lenses with a singular isothermal ellipsoid mass profile,
Euclid Collaboration: Busillo et al. (2025)

Euclid Quick Data Release (Q1): The first catalogue of strong-lensing galaxy clusters,
Euclid Collaboration: Bergamini et al. (2025)

Euclid Quick Data Release (Q1): Combined Euclid and Spitzer galaxy density catalogues at z>1.3 and detection of significant Euclid passive galaxy overdensities in Spitzer overdense regions,
Euclid Collaboration: Mai et al. (2025)

Euclid Quick Data Release (Q1): The role of cosmic connectivity in shaping galaxy clusters,
Euclid Collaboration: Gouin et al. (2025)

Euclid Quick Data Release (Q1): Galaxy shapes and alignments in the cosmic web,
Euclid Collaboration: Laigle et al. (2025)

Euclid: Quick Data Release (Q1): Photometric studies of known transients,
Duffy et al. (2025)

Euclid: Quick Data Release (Q1): A census of dwarf galaxies across a range of distances and environments,
Marleau et al. (2025)