Publication

New Comology group Publication

November 11, 2020

Observational Cosmology Group

“Dark Energy Survey Year 3 Results: Weak Lensing Shape Catalogue ”, led by Marco Gatti, has been uploaded to arXiv as part of the upcoming DES year 3 cosmology analysis of galaxy clustering and gravitational lensing.

The paper presents and characterises the galaxy shape catalogue of DES Y3, which consists of 100,204,026 galaxies, measured in the riz bands, making it the largest catalogue for weak lensing studies ever created. The catalogue passes a large number of null tests, discussed in the paper. This work has a key role in the upcoming DES cosmological analysis release (see for further details on the DES website )

Latest Group News

Event

CEPC 2025 International Workshop takes place in Barcelona

June 19, 2025

The 2025 European Edition of the International Workshop on the Circular Electron-Positron Collider (CEPC) is currently underway in Barcelona, Spain, from June 16 to 19, hosted by IFAE.

Event

Outreach talk about the latest DESI results

June 11, 2025

Sindhu Satyavolu and Laura Casas delivered the seminar “Probing Cosmic Acceleration with DESI: Is Dark Energy Evolving?” at the Sala de Graus II (UAB), in a hybrid format. The speakers presented the latest results from the Dark Energy Spectroscopic Instrument (DESI) and introduced key cosmological concepts to ensure accessibility for a non-specialist audience.

New results

Andreu Font Presents Latest DESI BAO Results at Harvard

May 5, 2025

Andreu Font presented new DESI results on Baryon Acoustic Oscillations at Harvard, raising questions about the ΛCDM model and the constancy of the cosmological constant.