The DES Collaboration observed 5000 sq. deg. of the southern sky during six years and measured the position on the sky, photometric redshift and shape of about 200 million galaxies, while simultaneously measuring the light curves of over 1500 type-Ia supernovae (SNe). With these two unprecedented samples, DES has determined cosmological parameters related to the expansion of the universe using...
We present an improved component-wise baryonification model (BFC) that enhances dark-matter-only N-body simulations by generating particle-level outputs for gas, dark matter, and stars. We validate the model against FLAMINGO and TNG hydrodynamical simulations and demonstrate accurate reproduction of density and pressure profiles across a wide range of halo masses. Furthermore, the model is...
While DESI has already delivered exciting results from its BAO measurements as well as full-shape galaxy clustering analyses, it also has compelling synergies with other observations, particularly, the weak lensing surveys. In this talk, I will present an overview of the joint galaxy clustering and shear cosmology analysis, which makes use of the full shape of DESI galaxy clustering in...
We present a joint analysis of galaxy clustering and galaxy-galaxy lensing measurements from BOSS galaxies using the method of simulation-based emulation combined with halo occupation distribution model. Our emulator is constructed with Aemulus $\nu$ simulations, a suite of $w\nu$CDM N-body simulations with massive neutrinos as an independent particle species. We combine the small-scale...
