Antón Baleato Lizancos
I am a cosmologist and BCCP postdoctoral fellow at the Berkeley Center for Cosmological Physics at UC Berkeley and the Lawrence Berkeley National Laboratory. Previously, I was at the University of Cambridge for my PhD and M.ASt., and at Columbia University for my B.Sc.
Research. The ultimate goal of cosmology is to understand the evolution of the Universe and shed light on the fundamental laws of Physics. My work sits at the interface of theory and observations, geared towards extracting as much information as possible from the data—typically observations of the cosmic microwave background (CMB, relic light from the Big Bang) or the shape and distribution of galaxies tracing the large-scale structure (LSS) of the Universe.
A focal point of my work is using gravitational lensing of background images such as the CMB or galaxies by the large-scale distribution of matter to test the cosmological model and fundamental physics, including the nature of dark energy, gravity and neutrinos. This information can also be used to sharpen observations of the B-mode polarization of the CMB—a crucial step in the search for the very weak primordial B-mode signal thought to have been produced by gravitational waves generated during cosmic inflation, a tiny fraction of a second after the beginning of time.
Though primarily a theorist, I enjoy working at the interface with data. I am a member of two major international collaborations: the Simons Observatory (SO), where I co-lead the delensing working group, and the Dark Energy Spectroscopic Instrument (DESI), where I am coordinating a DR2 Key Project jointly analyzing galaxy clustering with lensing observables.
FAQ about my name: my first name is Antón, and I have two last names, Baleato and Lizancos, as is traditional in the Iberian peninsula and much of the world. Baleato comes from my father, and Lizancos from my mother. In my articles I use both, but please feel free to refer to me just by one (typically Antón Baleato). In case you were wondering, I am from Galicia, and have had the pleasure of living in British Columbia (Coast Salish land), New York (Lenape land), Cambridge, and California (Ohlone land).
recent publication highlights
- An analytic approximation to the covariance between pre- and post-reconstruction galaxy two-point statisticsFeb 2026
- The Atacama Cosmology Telescope: B-mode delensing with DR6 data and external tracers of large-scale structureNov 2025