FIGARO Simulation: FIlaments & GAlactic RadiO Simulation

Abstract

We produce the first low to mid frequency radio simulation that incorporates both traditional extragalactic radio sources as well as synchrotron cosmic web emission. The FIlaments \& GAlactic RadiO (FIGARO) simulation includes ten unique \SI{4x4}{\degree} fields, incorporating active galactic nucleii (AGNs), star forming galaxies (SFGs) and synchrotron cosmic web emission out to a redshift of $z=0.8$ and over the frequency range 100-1400 MHz. To do this, the simulation brings together a recent $100^3$ Mpc${}^3$ magneto-hydrodynamic simulation (Vazza et al., 2019), calibrated to match observed radio relic population statistics, alongside updated `T-RECS' code for simulating extragalactic radio sources (Bonaldi et al., 2019). Uniquely, the AGNs and SFGs are populated and positioned in accordance with the underlying matter density of the cosmological simulation. In this way, the simulation provides an accurate understanding of the apparent morphology, angular scales, and brightness of the cosmic web as well as -- crucially -- the clustering properties of the cosmic web with respect to the embedded extragalactic radio population. We find that the synchrotron cosmic web does not closely trace the underlying mass distribution of the cosmic web, but is instead dominated by shocked shells of emission surrounding dark matter halos and resembles a large, undetected population of radio relics. We also show that, with accurate kernels, the cosmic web radio emission is clearly detectable by cross-correlation techniques and this signal is separable from the embedded extragalactic radio population. We offer the simulation as a public resource towards the development of techniques for detecting and measuring the synchrotron cosmic web.

Submitted to Publications of the Astronomical Society of Australia

References in corpus (6)

• A census of baryons in the Universe from localized fast radio bursts
• Radio signature of cosmological structure formation shocks
• Magnetic field evolution in relativistic unmagnetized collisionless shocks
• The clustering and bias of radio-selected AGN and star-forming galaxies in the COSMOS field
• Detecting shocked intergalactic gas with X-ray and radio observations
• Multi wavelength cross-correlation analysis of the simulated cosmic web

Cited by in corpus (7)

• Polarized accretion shocks from the cosmic web
• The evolution of cosmic ray electrons in the cosmic web: seeding by AGN, star formation and shocks
• Filamentary Baryons and Where to Find Them: A forecast of synchrotron radiation from merger and accretion shocks in the local Cosmic Web
• Stacking the Synchrotron Cosmic Web with FIGARO
• Searching for the Synchrotron Cosmic Web Again: A replication attempt
• Mapping Diffuse Radio Sources Using TUNA: A Transformer-Based Deep Learning Approach
• Convolutional Deep Denoising Autoencoders for Radio Astronomical Images