Lyman-α forest holography
Translating DESI 1D measurements into nonlinear 3D clustering predictions and priors.
Research theme · 01
Lyman-α forest
Quasar light carries a three-dimensional map of intergalactic hydrogen. I build fast, physically informed models that turn this forest of absorption into precision measurements of cosmic structure.
The Lyman-α forest probes matter across redshifts and scales that are difficult to reach with galaxies. Its cosmological power comes with a modelling challenge: the signal depends on nonlinear gravity, gas physics, thermal history, and observational effects.
My work replaces repeated, expensive simulation campaigns with surrogate models trained on suites of hydrodynamical simulations. These models connect one- and three-dimensional forest statistics, remain sensitive to cosmology and intergalactic-medium physics, and make previously inaccessible scales usable for inference.
Selected work
From spectra to structure
Cosmological analysis of DESI DR1 P1D
Constraining the amplitude and slope of the linear matter spectrum from small-scale forest data.
ForestFlow
Predicting one- and three-dimensional forest power from linear to deeply nonlinear scales.
A neural-network emulator for P1D
Sub-percent flux-power predictions across cosmology and intergalactic-medium parameters.