Opendata, web and dolomites


Astrophysics for the Dark Universe: Cosmological simulations in the context of dark matter and dark energy research

Total Cost €


EC-Contrib. €






Project "COSMO_SIMS" data sheet

The following table provides information about the project.


Organization address
address: RUE MICHEL ANGE 3
city: PARIS
postcode: 75794

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country France [FR]
 Project website
 Total cost 1˙471˙382 €
 EC max contribution 1˙471˙382 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2015-STG
 Funding Scheme ERC-STG
 Starting year 2016
 Duration (year-month-day) from 2016-09-01   to  2021-08-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

The objective of this ambitious research proposal is to push forward the frontier of computational cosmology by significantly improving the precision of numerical models on par with the increasing richness and depth of surveys that aim to shed light on the nature of dark matter and dark energy.

Using new phase-space techniques for the simulation and analysis of dark matter, completely new insights into its dynamics are possible. They allow, for the first time, the accurate simulation of dark matter cosmologies with suppressed small-scale power without artificial fragmentation. Using such techniques, I will establish highly accurate predictions for the properties of dark matter and baryons on small scales and investigate the formation of the first galaxies in non-CDM cosmologies. Baryonic effects on cosmological observables are a severe limiting factor in interpreting cosmological measurements. I will investigate their impact by identifying the relevant astrophysical processes in relation to the multi-wavelength properties of galaxy clusters and the galaxies they host. This will be enabled by a statistical set of zoom simulations where it is possible to study how these properties correlate with one another, with the assembly history, and how we can derive better models for unresolved baryonic processes in cosmological simulations and thus, ultimately, how we can improve the power of cosmological surveys. Finally, I will develop a completely unified framework for precision cosmological initial conditions (ICs) that is scalable to both the largest simulations and the highest resolution zoom simulations. Bringing ICs into the ‘cloud’ will enable new statistical studies using zoom simulations and increase the reproducibility of simulations within the community.

My previous work in developing most of the underlying techniques puts me in an excellent position to lead a research group that is able to successfully approach such a wide-ranging and ambitious project.


year authors and title journal last update
List of publications.
2018 Aseem Paranjape, Oliver Hahn, Ravi K Sheth
The dependence of galaxy clustering on tidal environment in the Sloan Digital Sky Survey
published pages: 5442-5452, ISSN: 0035-8711, DOI: 10.1093/mnras/sty633
Monthly Notices of the Royal Astronomical Society 476/4 2020-02-26
2017 Frank C van den Bosch, Go Ogiya, Oliver Hahn, Andreas Burkert
Disruption of dark matter substructure: fact or fiction?
published pages: 3043-3066, ISSN: 0035-8711, DOI: 10.1093/mnras/stx2956
Monthly Notices of the Royal Astronomical Society 474/3 2020-02-26
2017 C. Uhlemann, S. Codis, O. Hahn, C. Pichon, F. Bernardeau
Two is better than one: joint statistics of density and velocity in concentric spheres as a cosmological probe
published pages: 2481-2497, ISSN: 0035-8711, DOI: 10.1093/mnras/stx969
Monthly Notices of the Royal Astronomical Society 469/2 2020-02-26
2017 Go Ogiya, Oliver Hahn
What sets the central structure of dark matter haloes?
published pages: 4339-4359, ISSN: 0035-8711, DOI: 10.1093/mnras/stx2639
Monthly Notices of the Royal Astronomical Society 473/4 2020-02-26
2018 Frank C van den Bosch, Go Ogiya
Dark matter substructure in numerical simulations: a tale of discreteness noise, runaway instabilities, and artificial disruption
published pages: 4066-4087, ISSN: 0035-8711, DOI: 10.1093/mnras/sty084
Monthly Notices of the Royal Astronomical Society 475/3 2020-02-26
2017 Kohei Hayashi, Tomoaki Ishiyama, Go Ogiya, Masashi Chiba, Shigeki Inoue, Masao Mori
Universal Dark Halo Scaling Relation for the Dwarf Spheroidal Satellites
published pages: 97, ISSN: 1538-4357, DOI: 10.3847/1538-4357/aa74d9
The Astrophysical Journal 843/2 2020-02-26
2018 Aseem Paranjape, Oliver Hahn, Ravi K Sheth
Halo assembly bias and the tidal anisotropy of the local halo environment
published pages: 3631-3647, ISSN: 0035-8711, DOI: 10.1093/mnras/sty496
Monthly Notices of the Royal Astronomical Society 476/3 2020-02-26
2018 Go Ogiya
Tidal stripping as a possible origin of the ultra diffuse galaxy lacking dark matter
published pages: L106-L110, ISSN: 1745-3933, DOI: 10.1093/mnrasl/sly138
Monthly Notices of the Royal Astronomical Society: Letters 480/1 2020-02-26
2019 Michael Buehlmann, Oliver Hahn
Large-scale velocity dispersion and the cosmic web
published pages: 228-245, ISSN: 0035-8711, DOI: 10.1093/mnras/stz1243
Monthly Notices of the Royal Astronomical Society 487/1 2020-02-26
2019 Cora Uhlemann, Cornelius Rampf, Mateja Gosenca, Oliver Hahn
Semiclassical path to cosmic large-scale structure
published pages: 83524, ISSN: 2470-0010, DOI: 10.1103/physrevd.99.083524
Physical Review D 99/8 2020-02-26
2018 R. Adam, O. Hahn, F. Ruppin, P. Ade, P. André, M. Arnaud, I. Bartalucci, A. Beelen, A. Benoît, A. Bideaud, N. Billot, O. Bourrion, M. Calvo, A. Catalano, G. Coiffard, B. Comis, A. D’Addabbo, F.-X. Désert, S. Doyle, C. Ferrari, J. Goupy, C. Kramer, G. Lagache, S. Leclercq, J.-F. Lestrade, J. F. Macías-Pérez, G. Martinez Aviles, D. Martizzi, S. Maurogordato, P. Mauskopf, F. Mayet, A. Monfardini, F. Pajot, E. Pascale, L. Perotto, G. Pisano, E. Pointecouteau, N. Ponthieu, G. W. Pratt, V. Revéret, M. Ricci, A. Ritacco, L. Rodriguez, C. Romero, H. Roussel, K. Schuster, A. Sievers, S. Triqueneaux, C. Tucker, H.-Y. Wu, R. Zylka
Substructure and merger detection in resolved NIKA Sunyaev-Zel’dovich images of distant clusters
published pages: A118, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201731950
Astronomy & Astrophysics 614 2020-02-26
2019 Go Ogiya, Frank C van den Bosch, Oliver Hahn, Sheridan B Green, Tim B Miller, Andreas Burkert
DASH: a library of dynamical subhalo evolution
published pages: 189-202, ISSN: 0035-8711, DOI: 10.1093/mnras/stz375
Monthly Notices of the Royal Astronomical Society 485/1 2020-02-26

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