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Resolving the Multiscale, Multiphase Universe

Project description

Unlocking the secrets of Galactic growth

Galaxies grow by exchanging gas between their disks and the massive halos around them. However, the physics behind this process is still unclear, mainly because the gas in these areas exists in different states. Current simulations struggle to capture the full complexity of this gas, especially the cold gas found in galactic halos. This limits our ability to fully understand or predict how galaxies evolve. The ERC-funded ReMMU project aims to solve this by using a new approach to track gas in different states through advanced simulations. The project will run the first cosmological simulation with accurate gas properties and compare it to real data, helping us better understand how galaxies grow and evolve.

Objective

Galaxies grow through the reciprocal cycling of gas between disks and their massive surrounding halos. Despite major strides in observations and simulations, the physics regulating this galactic ecosystem remains unclear, primarily due to the multiphase, multiscale nature of circumgalactic gas.
All current cosmological simulations fail to capture the multiphase structure of galactic halos and exhibit a lack of convergence in even the first order gas properties such as the amount of cold gas found. This strongly limits their applicability in the circumgalactic medium to interpret existing observations as well as their predictive power.

ReMMU will breach this barrier by implementing an innovative multi-fluid subgrid model to track unresolved gas phases both in hydrodynamical and radiative transfer simulations.
The objectives of ReMMU are to (1) run the first cosmological simulation with converged gas properties and (2) perform a robust comparison with absorption as well as emission line data of galactic ecosystems.
This work will shed light on the drivers of galactic growth and feedback mechanisms, the key challenge to understand the formation and evolution of galaxies.

Only recent advances in fundamental hydrodynamical theory have constrained the parameter space sufficiently and, thus, opened the pathway for subgrid models of unresolved gas. Simultaneously, a rapidly growing body of observational surveys started to revolutionize the available data on galactic ecosystems.
Hence, ReMMU is particularly timely combining these advances: it will exploit the theoretical progress in a full cosmological context and establish firm predictions for comparison with observations across cosmic time, ultimately breaking the current impasse.

The PI has made significant contributions in the theory of small scale hydrodynamical as well as radiative transfer problems and is, therefore, uniquely suited to establish a world-leading team to carry out ReMMU.

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Programme(s)

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Topic(s)

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HORIZON-ERC - HORIZON ERC Grants

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Call for proposal

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(opens in new window) ERC-2024-STG

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Host institution

RUPRECHT-KARLS-UNIVERSITAET HEIDELBERG
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 1 492 750,00
Address
SEMINARSTRASSE 2
69117 Heidelberg
Germany

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Region
Baden-Württemberg Karlsruhe Heidelberg, Stadtkreis
Activity type
Higher or Secondary Education Establishments
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Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

€ 1 492 750,00

Beneficiaries (1)

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