XMAGNET: Velocity structure functions of active galactic nucleus-driven turbulence in the multiphase intracluster medium
arXiv:2502.19486 · doi:10.1051/0004-6361/202554278
Abstract
Significant theoretical and observational efforts are underway to investigate the properties of turbulence in the hot plasma that pervades galaxy clusters. Spectroscopy has been used to study the projected line-of-sight velocities in both the hot intracluster medium and the cold gas phase using optical and X-ray telescopes. In this paper, we characterize the velocity structure functions of the multiphase intracluster medium in a simulated galaxy cluster core and study the effects of projections on the hot and cold phase of the gas. To do so, we use the fiducial run of the XMAGNET suite, a collection of exascale magneto-hydrodynamical simulations of a cool-core cluster, to compute velocity structure functions. The simulation includes radiative cooling as well as a model for active galactic nuclei feedback. Examining three-dimensional and line-of-sight velocity structure functions, we find no clear correlation between the behavior of the hot () and cold ( K) phases VSFs. Assuming a power law model for the VSF, we find that the power law index of the cold phase varies significantly throughout the 4 Gyr simulation time. We compare our VSFs with observations using mock optical and X-ray images, and conclude that projection effects significantly impact the amplitude and power law index of both the hot and cold phases. In the cold phase, applying a Gaussian smoothing filter to model effects of atmospheric seeing increases significantly the power law index of the projected VSF at scales below the filter's kernel size. Moreover, the VSF amplitude and power law index vary significantly depending on the viewing orientation. We conclude that observational biases such as projection effects, atmospheric seeing and the viewing angle cannot be ignored when interpreting line-of-sight velocity structure of the intracluster medium.
18 pages, 19 figures. Published in A&A. More info/material: https://xmagnet-simulations.github.io
References in corpus (23)
- Array Programming with NumPy
- Shocks and cold fronts in galaxy clusters
- The Athena++ Adaptive Mesh Refinement Framework: Design and Magnetohydrodynamic Solvers
- Intracluster Medium Entropy Profiles for a Chandra Archival Sample of Galaxy Clusters
- The Quiescent Intracluster Medium in the Core of the Perseus Cluster
- Turbulent Heating in Galaxy Clusters Brightest in X-rays
- CMasher: Scientific colormaps for making accessible, informative and 'cmashing' plots
- Systematics in the X-ray Cluster Mass Estimators
- A deeper X-ray study of the core of the Perseus galaxy cluster: the power of sound waves and the distribution of metals and cosmic rays
- An Exact Integration Scheme for Radiative Cooling in Hydrodynamical Simulations
- Subgrid Modeling of AGN-Driven Turbulence in Galaxy Clusters
- Direct Detection of Black Hole-Driven Turbulence in the Centers of Galaxy Clusters
- Evolution of X-ray cavities
- Non-Kolmogorov turbulence in multiphase intracluster medium driven by cold gas precipitation and AGN jets
- Active galactic nucleus jet feedback in hydrostatic halos
- As a matter of dynamical range -- scale dependent energy dynamics in MHD turbulence
- Empirical constraints on the turbulence in QSO host nebulae from velocity structure function measurements
- An Atlas of Gas Motions in the TNG-Cluster Simulation: from Cluster Cores to the Outskirts
- Connecting turbulent velocities and magnetic fields in galaxy cluster simulations with active galactic nuclei jets
- The properties of magnetised cold filaments in a cool-core galaxy cluster
- Signature of Supersonic Turbulence in Galaxy Clusters Revealed by AGN-driven H Filaments
- On the impact of AGN feedback modes onto the turbulent properties of the multiphase ICM
- Measuring the ICM velocity structure within the A3266 galaxy cluster