Introducing the GION Lightcone Simulation Suite for Multi-Wavelength Large-Scale Structure Cosmology
Abstract
We present the GION (Ginkaku Lightcone Multi-wavelength Simulation Project) simulation suite: 10 full-sky high-resolution cosmological lightcone simulations and their associated products for multi-wavelength large-scale structure cosmology. We use the TreePM N-body code GINKAKU, which is highly optimized in the massively parallel environment, and integrate the on-the-fly lightcone construction technique. Each lightcone simulation is run with 61443 particles in a volume of (1.5 h−1 Gpc)3, which corresponds to a particle mass of 1.28 × 109 h−1 M⊙, and extends to z = 5. The fine mass resolution and the depth of the lightcone simulations allow us to resolve dark matter halos down to 1011 h−1 M⊙ in the high-redshift Universe, which is crucial for applications to the Stage-IV cosmological surveys. The fundamental statistics of the simulations, including the matter power spectrum, halo power spectrum, and halo mass function, are validated against theoretical predictions. We also generate various large-scale structure observables from the lightcone outputs: the dark matter halo catalogs, mock galaxy samples, weak lensing convergence maps, and thermal and kinematic Sunyaev-Zel'dovich (tSZ and kSZ) maps. The angular power spectra of these observables, including the cross-correlation between weak lensing and the tSZ effect, are in good agreement with theoretical predictions, demonstrating that the suite provides mutually consistent multi-wavelength observables on the same lightcone. The GION simulation suite will be publicly available and can be used for various cosmological analyses to address the observational systematic effects and validate theoretical models.
Related
- Cosmology with Multi-Wavelength Line Intensity Mapping Synergies in the SKAO Era
- The TNG50-SKIRT Atlas: Multi-wavelength properties of galaxy discs in the TNG50 simulation
- Merlin: Fast and flexible 3x2pt cosmology with simulation-based inference
- Field-level weak lensing cosmology with $60$ simulations using multifidelity simulation-based inference
- Granular Structure and Local de Broglie Wavelength in Fuzzy Dark Matter Halos
BibTeX
@misc{osato2026introducing,
title = {{Introducing the GION Lightcone Simulation Suite for Multi-Wavelength Large-Scale Structure Cosmology}},
author = {Ken Osato and Satoshi Tanaka and Tomoaki Ishiyama and Hironao Miyatake and Takahiro Nishimichi and Masato Shirasaki},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.32388},
eprint = {2610.32388},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.32388},
}
RIS
TY - UNPB
TI - Introducing the GION Lightcone Simulation Suite for Multi-Wavelength Large-Scale Structure Cosmology
AU - Ken Osato
AU - Satoshi Tanaka
AU - Tomoaki Ishiyama
AU - Hironao Miyatake
AU - Takahiro Nishimichi
AU - Masato Shirasaki
PY - 2026
DA - 2026/10/23
PB - arXiv
DO - 10.48550/arxiv.2610.32388
UR - https://arxiv.org/abs/2610.32388
AB - We present the GION (Ginkaku Lightcone Multi-wavelength Simulation Project) simulation suite: 10 full-sky high-resolution cosmological lightcone simulations and their associated products for multi-wavelength large-scale structure cosmology. We use the TreePM N-body code GINKAKU, which is highly optimized in the massively parallel environment, and integrate the on-the-fly lightcone construction technique. Each lightcone simulation is run with 6144^3 particles in a volume of (1.5 h^−1 Gpc)^3, which corresponds to a particle mass of 1.28 × 10^9 h^−1 M_⊙, and extends to z = 5. The fine mass resolution and the depth of the lightcone simulations allow us to resolve dark matter halos down to 10^11 h^−1 M_⊙ in the high-redshift Universe, which is crucial for applications to the Stage-IV cosmological surveys. The fundamental statistics of the simulations, including the matter power spectrum, halo power spectrum, and halo mass function, are validated against theoretical predictions. We also generate various large-scale structure observables from the lightcone outputs: the dark matter halo catalogs, mock galaxy samples, weak lensing convergence maps, and thermal and kinematic Sunyaev-Zel'dovich (tSZ and kSZ) maps. The angular power spectra of these observables, including the cross-correlation between weak lensing and the tSZ effect, are in good agreement with theoretical predictions, demonstrating that the suite provides mutually consistent multi-wavelength observables on the same lightcone. The GION simulation suite will be publicly available and can be used for various cosmological analyses to address the observational systematic effects and validate theoretical models.
ER -