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Mohammadreza (Reza) Ayromlou
Bonn, Germany Persian · English · German
Independent Argelander Fellow · University of Bonn

Mohammadreza (Reza) Ayromlou

I am an astrophysicist and computational scientist, currently the Independent Argelander Fellow at the University of Bonn, where I study how galaxies form and evolve — and how the physical processes behind that evolution shape the large-scale structure of the Universe.

In practice, I build theoretical models of galaxy formation, implement them in cosmological simulations and semi-analytical models, and test their predictions against observational data. A recurring theme of my work is how physical processes reshape the distribution and dynamics of baryonic matter relative to the dark matter, which evolves under gravity alone. In more technical terms, I develop interpretable, scalable, and predictive models for high-dimensional physical systems — combining analytical theory and numerical simulations with high-performance computing (HPC), machine learning, simulation-based inference, and GPU-accelerated scientific computing.

I received the 2023 Ernst Patzer Prize for introducing the Closure Radius, a characteristic scale that quantifies where ordinary matter displaced from its host dark matter halo becomes enclosed again. I am also a main developer and PI of several numerical simulation projects that connect theoretical models, computational methods, and cosmological big data.

I live in Bonn with my wife, and speak Persian, English, and German.

Path

  1. 2009 – 2014 Study

    B.Sc., Theoretical Physics

    University of Tehran · Tehran, Iran

  2. 2014 – 2016 Study

    M.Sc., Physics (Astrophysics and Cosmology)

    Sharif University of Technology · Tehran, Iran

    • Highest distinction
    • Thesis: The study of cosmological structure formation by physics of stochastic processes
  3. Jul 2017 – Mar 2021 Study

    Ph.D., Physics (Astrophysics and Cosmology)

    Max Planck Institute for Astrophysics & LMU Munich · Garching and Munich, Germany

    • With Guinevere Kauffmann and Simon D. M. White; awarded 17 March 2021
    • Thesis: Physical processes that determine the clustering of different types of galaxies on large scales
  4. Apr – Nov 2021 Research

    Postdoctoral Researcher

    Max Planck Institute for Astrophysics · Garching, Germany

  5. Dec 2021 – Sep 2024 Research

    Postdoctoral Researcher

    Centre for Astronomy (ZAH), Heidelberg University · Heidelberg, Germany

  6. Oct 2024 – present Current

    Independent Argelander Fellow and BCGS Lecturer

    Argelander Institute for Astronomy, University of Bonn · Bonn, Germany

Recognition

Ernst Patzer Prize

MPIA Heidelberg, 2023

For introducing the closure radius and its universal scaling relation.

Independent Argelander Fellowship

University of Bonn, 2024 – 2027

Accepted in preference to a competitively awarded independent postdoctoral fellowship in the U.S.

~20 million CPU hours

Leibniz Supercomputing Centre (LRZ), 2026 – 2027

A competitively awarded, peer-reviewed allocation for the iCluster simulations, on my application as PI.

How I work

Theory, computation and observation

I describe my work as the intersection of theory, computation, and observation — with the goal of understanding the fundamental processes that govern the Universe.

Theory

Developing theoretical models of how galaxies and cosmic structures form and evolve.

  • Closure radius
  • Local background environment
  • Galactic conformity

Computation

Implementing them in cosmological simulations and semi-analytical models on HPC systems.

  • L-Galaxies
  • AREPO
  • iCluster
  • PROFI
  • MCMC calibration
  • Machine learning

Observation

Testing the results against observational data, and letting what we see guide the next model.

  • SDSS
  • DESI
  • eROSITA
  • XMM-Newton
  • JWST
  • Euclid

Get in touch

Questions about my research, the simulations or the data, or interested in a student project? I am happy to hear from you.