Uchuu Simulations

Uchuu is a 2.1 trillion N-body simulation that uses Planck2015 cosmology. It was produced with the GreeM N-body code (Ishiyama et al. 2009, Ishiyama et al. 2012) at the ATERUI II supercomputer in Japan. Another two boxes were run with the same resolution but different volumes (mini-Uchuu, micro-Uchuu); and a third one with higher resolution (Shin-Uchuu). The Uchuu Project has also made use of the skun6@IAA computer facility in Spain. More details are given in the Uchuu DR1 paper by Ishiyama et al. 2020.


Uchuu DR1 Public Data Access is available only through this Skies & Universes site. We offer two ways to access and work with Uchuu DR1 Products:

  • Halos, merger trees, dark matter particles, lensing and galaxy products are reacheable through a fast download speed via skun@IAA_RedIRIS
  • For large scale analysis, users are welcome to develop analysis codes and run tasks by launching a Jupyter notebook using Uchuu-BigData@CESGA

cosmological parameters
Planck2015 (table 4, rightmost column)
Ω_m = 0.3089 Ω_L = 0.6911 h = 0.6774
σ_8 = 0.8159 Ω_b = 0.0486 ns = 0.9667
Linear Power Spectrum
z_init = 127 (2LPT)

Uchuu12-1

Simulation Name

Lbox

Mpc/h

Npart

 

Mpart

Msun/h

Snap

Halo

Tree

DM

Lens

Gal

Uchuu

2000

12800^3

3.27e8

List1

Aug 31

CS

mini-Uchuu

400

2560^3

3.27e8

List2

Aug 7

 

CS

micro-Uchuu

100

640^3

3.27e8

List3

 

CS

Shin-Uchuu

140

6400^3

8.97e5

List4

Sep 30

Sep 30

Sep 30

 

CS

 

Uchuu is a Japanese word meaning Universe.