New Publication

New Cosmology group publication

Authors are Dane Noelle Cross and Carles Sánchez

Dane Noelle Cross and Carles Sánchez published a paper titled Inverse Galaxy-Galaxy Lensing: Magnification, Intrinsic Alignments and Cosmology .

The paper discusses how current and upcoming imaging galaxy surveys are extending galaxy samples to higher redshifts. This trend is particularly notable for lens galaxies, where only galaxy positions (not shapes) are needed. As a result, lens galaxies may frequently be observed at redshifts higher than those of source galaxies, changing the traditional galaxy-galaxy lensing configuration. In this paper, the authors explore where lens galaxies are behind source galaxies, and demonstrate how it is possible to tease out systematic error and better constrain cosmology.

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.