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The key to precise and accurate cosmology: Simulating the physics that shapes gaseous haloes

Project description

Theoretical models integrating the effects of black holes on haloes

Theoretical modelling and observational cosmology go hand in hand. Current theoretical models often neglect the complex physics of galaxy formation, such as the powerful feedback processes from supermassive black holes and their effects on the huge clouds of gas around galaxies (haloes). The ERC-funded COSMIC-KEY project will fill this gap. Building on the successful IllustrisTNG simulations modelling the formation and evolution of galaxies, the team will create new simulated datasets (beginning with the TNG-Cluster suite) to study more numerous and more massive synthetic galaxy clusters. Improved representation of gas, radiation and black hole activity will help researchers compare simulations with observations for more reliable measurements of the universe.

Objective

Observational programs aimed at mapping the large-scale structure of the Universe, such as eROSITA and Euclid, are ushering in the era of Precision Cosmology. Our knowledge will soon transition from being limited by statistical errors, to being hindered by systematic uncertainties. These systematics arise from the theoretical modeling adopted to fit the data and the complex physics of galaxy formation, whose effects are often neglected. In fact, powerful feedback processes from supermassive black holes (SMBHs) affect the phase-space and thermodynamical properties of the gas within haloes and beyond, in turn modifying the expectations for the cosmological observables and the large-scale matter distribution.

In order to fulfill the potential of observational cosmology, we must take a far-reaching step forward by a) designing novel types of large-scale simulations that model gaseous haloes and the effects of SMBH feedback to unprecedented levels of realism and by b) providing quantitative and trustworthy — that is, physically-motivated and observationally-validated — prescriptions for cosmological analyses.

Starting from the well-validated IllustrisTNG hydrodynamical simulations, we will extend their scope to more massive systems with a new suite, TNG-Cluster. We will provide a library of baryon-informed formulae for cosmological constraints with galaxies, groups, and clusters as well as design novel observational tests for SMBH feedback models. Going beyond the state-of-the-art, we will develop numerical models that account for the effects of the multi-phase structure of the gas, of radiation, and of more sophisticated SMBH physics by using new simulation techniques and by complementing the AREPO code with on-the-fly machine learning-based methods. These will enable groundbreaking large-scale simulations, new types of comparisons to observations of both the hot and cold halo gas, and, ultimately, novel and independent analyses of available cosmological data.

Fields of science (EuroSciVoc)

Programme(s)

Topic(s)

Funding Scheme

HORIZON-ERC - HORIZON ERC Grants

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Call for proposal

(opens in new window) ERC-2022-COG

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Host institution

MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN EV
Net EU contribution
€ 1 997 500,00
Address
HOFGARTENSTRASSE 8
80539 MUNCHEN
Germany
Region
Berlin Berlin Berlin
Activity type
Research Organisations
Links
Total cost
€ 1 997 500,00

Beneficiaries (1)