My science

We map the coherent spatial and kinematic distribution of galaxy halos at high redshift in absorption against gravitational arcs. See ARCTOMO site here and some broad public articles here and here.

This ESO Large Programme has produced an homogeneous and high-quality sample of 100 XSHOOTER spectra of QSOs at redshifts z~3.5-4.5 (Lopez et al. 2016). The scientific topics include: AGN physics, dark-matter power spectrum, and intervening absorption line systems.

In the "Quasars behind Clusters" (QbC) survey (Lopez et al. 2008) we pioneered the study of the effect of group and cluster-size environment on the gaseous content of galaxies. Now we want to refine this study using the fastest spectrograph in the world: 4MOST on the VLT.