Massive Neutrinos, Dark Sector, and Hydrodynamics: The Sejong Suite

TL;DR

The Sejong Suite provides high-resolution hydrodynamical simulations crucial for interpreting small-scale clustering in cosmology, aiding in constraining neutrino mass and dark matter properties with upcoming survey data.

Contribution

It introduces a comprehensive, high-resolution simulation suite tailored for dark sector studies and LyA forest analysis, with improved convergence and broader applicability.

Findings

Achieves convergence on LyA flux statistics at 1% level

Supports constraints on neutrino mass and dark matter properties

Offers a versatile simulation framework for cosmological research

Abstract

Improving the understanding of the processes governing small-scale nonlinear clustering is a necessary task for interpreting upcoming high-quality cosmological data, as it will allow one to break degeneracies and obtain tight neutrino mass and warm dark matter constraints from large-scale structure probes. The Sejong Suite, an extensive collection of state-of-the-art high-resolution cosmological hydrodynamical simulations, has been intended with this primary goal in mind. Spanning a large number of cosmological and astrophysical parameters (especially suitable for the dark sector), and organized into three main categories (Grid Suite, Supporting Suite, and Systematics Suite), the release may be useful for a broader variety of cosmological and astrophysical purposes - while primarily developed for Lyman-Alpha (LyA) forest studies. In particular, the overall architecture of the Grid Suite has been designed to achieve an equivalent resolution up to 3x3328^3=110 billion particles in a 100 Mpc/h box, corresponding to a 30 kpc/h mean grid resolution, which ensures convergence on LyA flux statistics closer to the desired 1.0% level that data from surveys such as the Dark Energy Spectroscopic Instrument (DESI) will provide. Here, we briefly highlight the main characteristics, improvements, and novelties of the Sejong Suite, as well as ongoing and future applications.