Most of my research interests are in the area of observational cosmology. I am particularly interested in the analysis of large spectroscopic datasets to study the large-scale structure of the Universe. In short, I construct 3D maps of the distribution of mass as a function of time, and I use these maps to understand better the evolution of the Universe.

During the last ten years I have been heavily involved in the cosmological analysis of the Baryon Oscillation Spectroscopic Survey (BOSS) collaboration, and of its successor eBOSS. I was one of the main authors of the DR16 BAO results using the Lyman alpha forest dataset, presented in du Mas des Bourboux et al. (2020), and of the final cosmological analysis from SDSS, presented in eBOSS Collaboration et al. (2021).

Our measurements of Baryon Acoustic Oscillations (BAO) at high redshift provide very accurate constraints on the expansion history of the Universe. You can find a press release from 2014 here, and outreach article here (in English) and a more recent outreach article here (in Spanish, published in Investigación y Ciencia).

I am now co-leading the BAO analysis from the Lyman alpha forest dataset of the Dark Energy Spectroscopic Instrument (DESI). Since May 2021, DESI is trying to solve the mistery of Dark Energy, while measuring the mass of the neutrinos, the lightest particles that exist.