Data and Software Products

Here is some of the publicly available output from our group (not complete yet)

MUSIC – Multi-Scale Initial Conditions Code

MUSIC is a computer program to generate nested grid initial conditions for high-resolution “zoom” cosmological simulations. A detailed description of the algorithms can be found in Hahn & Abel (2011). You can download the user’s guide here. Please consider joining the user mailing list.

Current MUSIC key features are:

  • Supports output for RAMSES, ENZO, Arepo, Gadget-2/3, ART, Pkdgrav/Gasoline and NyX via plugins. New codes can be added.
  • Support for first (1LPT) and second order (2LPT) Lagrangian perturbation theory, local Lagrangian approximation (LLA) for baryons with grid codes.
  • Pluggable transfer functions, currently CAMB, Eisenstein&Hu, BBKS, Warm Dark Matter variants. Distinct baryon+CDM fields.
  • Minimum bounding ellipsoid and convex hull shaped high-res regions supported with most codes, supports refinement mask generation for RAMSES.
  • Parallelized with OpenMP
  • Requires FFTW (v2 or v3), GSL (and HDF5 for output for some codes)

You can access the code through its bitbucket repository or download a ZIP file on the code web site

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. By downloading and using MUSIC, you agree to the LICENSE, distributed with the source code in a text file of the same name.


DASH – a library of dynamical subhalo evolution

DASH is a library that contains thousands of N-body simulations following the dynamical evolution of a dark matter subhalo in a host halo potential as described in Ogiya et al. 2019. The DASH library is freely accessible and comes with a Python notebook that implements a pre-trained (machine learned) model of the data.

Click here to access the DASH website

Visualizations

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

music logo

what is MUSIC? Download  Contact

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

Infos

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


Download

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)

OK, get me a zip file of the latest version


Contact

mailing list

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DASH: Dynamical Aspects of SubHaloes

Welcome to the download site of the DASH library!
You can get the data and find a list of relevant papers and contact email addresses below.

downloadDownload [DASH_19.05.09.tar.gz, ~0.6GB]

Last update on May 9th, 2019:

   1) Models of xc=1.16 and eta=0.9 for 121 pairs of ch-cs are included in ch*/cs*/xc6/eta9

    so that the total number of tidal stripping simulations is increased to 2253.

   2) Results of isolated subhalo simulations are also available in iso/cs*.

We kindly ask that any paper that uses data from the library cites the DASH paper, Ogiya et al., MNRAS, 485, 189 (arXiv:1901.08601).

papers

 Papers

List of relevant papers.

 van den Bosch, Ogiya, Hahn & Burkert (2018)

"Disruption of dark matter substructure: fact or fiction?", MNRAS, 474, 3043 (arXiv:1711.05276)

van den Bosch & Ogiya (2018)

"Dark matter substructure in numerical simulations: a tale of discreteness noise, runaway instabilities, and artificial disruption",
MNRAS, 475, 4066 (arXiv:1801.05427)

Ogiya, van den Bosch, Hahn, Green, Miller & Burkert (2019)

"DASH: a library of dynamical subhalo evolution", MNRAS, 485, 189 (arXiv:1901.08601)

contactContact

If you have any questions or requests, you can contact us via email.
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 Supported by the European Research Council
(grant agreement No. 679145, project ‘COSMO-SIMS’)
and the Yale Center for Research Computing.
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