Galaxy–halo connection · Assembly bias

Assembly bias

Dark-matter halos remember how they formed. I study how that history changes the galaxies they host and the clustering signals used for cosmology.

Halo growthGalaxy selectionHydrodynamical simulationsClustering

Halo mass alone does not determine where halos live: concentration, formation time, spin, and accretion history also correlate with environment. Galaxy formation inherits and reshapes these correlations, creating galaxy assembly bias.

My work measures this signal across galaxy samples and redshifts, separates halo assembly bias from occupancy variation, and tests which halo properties can reproduce it. This is essential for robustly interpreting the small-scale clustering measured by DESI and other precision surveys.

Selected work

Beyond halo mass

All publications →