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Welcome to the homepage of MUSIC - a program to generate zoom initial conditions for cosmological simulations. © 2013-2017 by Oliver Hahn


What is MUSIC ?

MUSIC - (MUlti-Scale-Initial-Conditions)

is a computer program to generate nested grid initial conditions for high-resolution "zoom" cosmological simulations. MUSIC currently has the following features:

- Supports output for many cosmological simulation codes via plugins: RAMSES, ENZO, Gadget-2/3, Arepo, ART, Pkdgrav/Gasoline and NyX are currently supported. New codes can be added easily.

- Support for first (1LPT) and second order (2LPT) Lagrangian perturbation theory

- Pluggable transfer functions, currently CAMB, Eisenstein&Hu, BBKS, Warm Dark Matter variants. Distinct baryon+CDM fields are possible.

- Minimum bounding ellipsoid and convex hull shaped high-res regions supported with most codes optimizing the high-resolution volume. supports refinement mask generation for RAMSES.

- Parallelized with OpenMP

Requires FFTW (v2 or v3), GSL (and HDF5 for output for some codes)

pdfuser's guide (pdf)3.31 Mo

Paper on arXiv


go to code repository

get zip file of latest version

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of FITNESS FOR A PARTICULAR PURPOSE.

Please subscribe to the mailing list if you have questions regarding the use of MUSIC. Important updates will also be announced through the mailing list.

Consider using the version controlled access through the bitbucket repository for easier updates in the future.

In any scientific publication making use of MUSIC, please reference the code paper Hahn & Abel (2011)

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Here are some of our visualisation highlights… More in progress…

Formation of a massive galaxy cluster

This movie shows the evolution of the gas during the formation of a very massive galaxy cluster from the RHAPSODY-G simulations. The gas density is shown in gray colors with the gas temperature overlaid in orange. The abundance and properties of these massive systems contain a wealth of information about the physics and cosmology of our Universe. The image is 17 Mpc/h wide, projection depth is 5 Mpc/h. Visualization by Oliver Hahn Simulation: Oliver Hahn, Davide Martizzi

Formation of the cosmic web

This movie shows the formation of the cosmic web of dark matter from random fluctuations in the early universe. The intricate network of filaments hosts dark matter halos, the most massive of them are rendered in bright yellow hinting at the galaxies they are thought to host in the LCDM cosmological model. Visualization by Ralf Kaehler, Carter Emmart, Tom Abel for AMNH planetarium show “The Dark Universe”. Simulation: Tom Abel, Oliver Hahn

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