The Millennium Run

The Millennium Run Project zLargest simulation of cosmic structure growth zSimulates cold dark matter Projects Goals zConclude if current model of galaxy

Carching, December 2012 The Millennium Simulation Programme

Millennium Run 2004 Springel et al 2005 Goal: To carry out a DM- only ΛCDM simulation of a cosmologically relevant volume with sufficient resolution to follow the formation of galaxies in halos and subhalos using Semi-analytic techniques

Exploring the Millennium Run - Scalable Rendering of Large

One of the most popular simulations is the Millennium Run, where more than 10 billion particles have been used to trace the evolution of the matter distribution in a cubic region of the Universe with over 2 billion light-years on a side, resulting in terabytes of stored output The simulation itself ran 28 machine days at 0 2 Tﬂops using 1

TheSpatialDistributionof SatelliteGalaxies

We use the ﬁrst Millennium Run simulation (MRS) to investigate the spa-tial locations of the satellites of relatively isolated host galaxies The stellar masses of the MRS hosts span a range of 10 3 6log 10 [M∗/M⊙] 611 5, and host-satellite systems were selected via typical redshift space proximity crite-ria

arXiv:astro-ph/0611641 v1 20 Nov 2006

2 THE SIMULATION 2 1 Simulation Details We make use of the z = 0 halo catalogue obtained from the Millennium Run, a very large dark–matter–only N– body simulation of the concordance ΛCDM cosmology with 21603 particles in a (periodic) box of size 500h−1 Mpc in each dimension The cosmological parameters are total mat-

The Millennium-XXL Project: Simulating the Galaxy Population

Millennium Run (MR), performed by our Virgo Consortium group in 2004 [3] This simulation was the first, and for many years the only run with more than 1010 particles, exceeding the size of previous simulations by almost an order of magnitude Its success was not only computational but most im-portantly scientific – more than 300

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Marinus Israel - Nienke van der Marel

December 2nd 2005

OverviewThe Millennium Run Project

Project Goals

Method and initial parameters

Results

Quasar descendants

Two-point correlation function

Baryonic oscillations

Summary

The Millennium Run ProjectLargest simulation of cosmic structure growth

Simulates cold

dark matter

Projects GoalsConclude if current model of galaxy

formation is consistent with surveys.

Explore the physics which give rise to

galaxies.

Z = 18.3, t=0.21Gy

Z = 5.7, t=1.0Gy

Z = 1.4, t=4.7Gy

Z = 0, t=13.6Gy

Methods and initial parameters10billionparticles

860 M
per particle

Cube 2 billion ly per side

Starts at z=127

11,000 timesteps to present

First resultSurprisingly similar to

observational surveys!

SMBs found in early

Universe

ResultsQuasar descendants

Two-point correlation function

Baryonic oscillations

Quasar descendantsQuasars: most luminous objects

Brightest quasars <-> largest galaxies

Millennium Run:

z=0: 10 -3 s.m. z=6.2: 10 -1 -10 -2 s.m.

Must convert faster than 0,1.c

Today in richest clusters

Galaxy two-point correlationMeasure of structure

įP= N[1+wș)]įȍ

Power-law ->

coincidence!

Nature paper 2nd June 2005

Galaxy two-point correlation

Nature paper 2nd June 2005

Baryonic oscillationsPlasma in early Universe (< 300 000 yrs)

Coupled baryon-photon fluid

Sound waves

Snapshot in CMB

Influence density distribution

Baryonic oscillationsImprint in power spectrum dark matter

Important -> dark energy equation?

Present in galaxy distribution z~3

Now marginally able to detect

Better measurements in future?

SummaryMillennium Run: large simulation

Main goals:

Test consistency current models

Explore physics

Results:

Quasar descendants

Galaxy two-point correlation

Baryonic oscillations

įP= N[1+wș)]įȍ

Sources'Simulations of the formation, evolution and clustering of galaxies and quasars' by V. Springer et alii (Nature paper 2 nd

June 2005)

'Digitizing the universe' by N.Y.Gnedin (Nature paper 2 nd

June 2005)

'FMOS detection of Cosmic Sound: A modest proposal' by Karl Glazebrookquotesdbs_dbs13.pdfusesText_19

[PDF] The Millennium Run - Leiden Observatory