Parallel sessions

Galaxy Clusters have proven to be powerful probes of a wide range of astrophysical processes, structure formation, and cosmology. Large cluster samples, constructed over multiple wavelengths (e.g. the Dark Energy Survey, HSC, XXL and XCS), means that we are now entering a period of precision cosmology with galaxy clusters. Furthermore, deep observations of galaxy clusters (e.g. long baseline observations of Perseus) and observations with exciting new instruments (e.g. Hitomi, and it’s upcoming replacement XRISM) has increased our knowledge of cluster physics. However, one requires simulations to assess our analysis methods and our understanding of the complex physical processes within clusters. Simulations have been used extensively in large collaborations to test and calibrate pipelines (e.g. Buzzard - DES), and to develop robust cosmological analysis (CosmoDC2 - LSST). The aim of this session is to bring together both observers and simulators in order to present and discuss what each discipline needs from the other.

The coming together of observations and simulations will be essential in understanding the results from such missions as the recently launched eROSITA, and the upcoming (newly named) Vera C. Rubin Observatory, pushing cluster sample sizes into the 100000s. Simulations such as Illustris-TNG and BAHAMAS contain hundreds of group and cluster size halos, and re-simulated dark matter halos such as The 300 Project and C-EAGLE have explored different feedback and gas physics models. The community has even been able to venture beyond LambdaCDM and explore novel models, such as recent simulations of fuzzy dark matter at high redshifts.

Working together to improve simulations for observers and observations for simulators will only make it easier to prepare for the large datasets that exist now, and the huge datasets that will exist in the near future.

Schedule:

Session 1
09:00 Anishya Harshan “Beginning of the End for Massive Proto-Cluster Galaxies at z~2”
09:10 Rajsekhar Mohapatra “Turbulence in the intracluster medium: the effects of stratification”
09:20 Lorenzo Maria Perrone “The Magneto-Thermal Instability in Galaxy Clusters”
09:30 Ricarda Beckmann “Cosmic rays and the multi-phase gas in clusters”
09:40 Matteo Bianconi “LoCuSS: The splashback radius of massive galaxy clusters and its dependence on cluster merger history”
09:50 David Vallés-Pérez “Characterising the temporal and spatial distribution of mass accretion flows around galaxy clusters”
10:00 Andrius Tamosiunas “Tests of Modified Gravity with Simulations and Numerical Methods”
10:15 Roan Haggar “The evolution of galaxy groups during cluster infall”

Session 2
13:00 Johan Comparat “Full-sky photon simulation of clusters and active galactic nuclei in the soft x-rays for eRosita”
13:15 Riccardo Seppi “The mass function dependence on dark matter haloes dynamical state”
13:30 Syeda Lammim Ahad “Stellar mass functions and mass density profiles of galaxy clusters at 0z1.5 using the Hydrangea simulation suite”
13:45 Sebastian Grandis “Determining the accuracy of cluster weak lensing masses”
14:00 Jake Bennett “A disturbing FABLE: tales of mergers, morphology and mass biases”
14:15 Congyao Zhang “Evolution of Shocks and Splashback Boundaries in Cluster Outskirts”
14:25 Douglas Rennehan “Rapid early coeval star formation and assembly of the most massive galaxies in the universe”