A MeerKAT-meets-LOFAR study of Abell 1413: a moderately disturbed non-cool-core cluster hosting a $\sim 500$ kpc 'mini'-halo

Abstract

Many relaxed cool-core clusters host diffuse radio emission on scales of hundreds of kiloparsecs: mini-haloes. However, the mechanism responsible for generating them, as well as their connection with central active galactic nuclei, is elusive and many questions related to their physical properties and origins remain unanswered. This paper presents new radio observations of the galaxy cluster Abell 1413 performed with MeerKAT (L-band; 872 to 1712 MHz) and LOFAR HBA (120 to 168 MHz) as part of a statistical and homogeneous census of mini-haloes. Abell 1413 is unique among mini-halo clusters as it is a moderately-disturbed non-cool-core cluster. Our study reveals an asymmetric mini-halo up to 584 kpc in size at 1283 MHz, twice as large as first reported at similar frequencies. The spectral index is flatter than previously reported, with an integrated value of $\alpha =-1.01\pm 0.06$, shows significant spatial variation, and a tentative radial steepening. We studied the point-to-point X-ray/radio surface brightness correlation to investigate the thermal/non-thermal connection: our results show a strong connection between these components, with a super-linear slope of $b=1.63\pm 0.10$ at 1283 MHz and $b=1.20\pm 0.12$ at 145 MHz. We also explore the X-ray surface brightness/radio spectral index correlation, finding a slope of $b=0.59\pm 0.11$. Both investigations support the evidence of spectral steepening. Finally, in the context of understanding the particle acceleration mechanism, we present a simple theoretical model which demonstrates that hybrid scenarios - secondary electrons (re-)accelerated by turbulence - reproduce a super-linear correlation slope.

19 pages, 11 figures, 4 tables. Accepted for publication in MNRAS

References in corpus (56)

• The NumPy array: a structure for efficient numerical computation
• Some Aspects of Measurement Error in Linear Regression of Astronomical Data
• WSClean: an implementation of a fast, generic wide-field imager for radio astronomy
• Shocks and cold fronts in galaxy clusters
• The LOFAR Two-metre Sky Survey - I. Survey Description and Preliminary Data Release
• Chandra temperature profiles for a sample of nearby relaxed galaxy clusters
• The LOFAR Two-metre Sky Survey -- V. Second data release
• Diffuse Radio Emission from Galaxy Clusters
• A Catalog of Galaxy Clusters Observed by XMM-Newton
• Compressible Turbulence in Galaxy Clusters: Physics and Stochastic Particle Re-acceleration
• The origin of cold fronts in the cores of relaxed galaxy clusters
• CMasher: Scientific colormaps for making accessible, informative and 'cmashing' plots
• An optimized algorithm for multi-scale wideband deconvolution of radio astronomical images
• The LOFAR Two Meter Sky Survey: Deep Fields, I -- Direction-dependent calibration and imaging
• Radio interferometric gain calibration as a complex optimization problem
• X-ray and Sunyaev-Zel'dovich Effect Measurements of the Gas Mass Fraction in Galaxy Clusters
• LOFAR/H-ATLAS: A deep low-frequency survey of the Herschel-ATLAS North Galactic Pole field
• Do radio core-halos and cold fronts in non major merging clusters originate from the same gas sloshing?
• LOFAR observations of galaxy clusters in HETDEX
• Non-linear Kalman filters for calibration in radio interferometry
• The MeerKAT Galaxy Cluster Legacy Survey I. Survey Overview and Highlights
• The 1.28 GHz MeerKAT DEEP2 Image
• Turbulence and Particle Acceleration in Giant Radio Haloes: the Origin of Seed Electrons
• Deep VLA observations of the cluster 1RXS J0603.3+4214 in the frequency range 1-2 GHz
• The Planck clusters in the LOFAR sky. I. LoTSS-DR2: new detections and sample overview
• Second order Fermi reacceleration mechanisms and large scale synchrotron radio emission in intra-cluster bridges
• A Chandra archival study of the temperature and metal abundance profiles in hot Galaxy Clusters at 0.1 < z < 0.3
• The beautiful mess in Abell 2255
• LOFAR discovery of an ultra-steep radio halo and giant head-tail radio galaxy in Abell 1132
• Dissecting nonthermal emission in the complex multiple-merger galaxy cluster Abell 2744: Radio and X-ray analysis
• Radio footprints of a minor merger in the Shapley Supercluster: From supercluster down to galactic scales
• The ultra-steep diffuse radio emission observed in the cool-core cluster RX J1720.1+2638 with LOFAR at 54 MHz
• Physical insights from the spectrum of the radio halo in MACS J0717.5+3745
• Radio and X-ray connection in radio mini-halos: implications for hadronic models
• On the relation between mini-halos and AGN feedback in clusters of galaxies
• Metal distribution in sloshing galaxy clusters: the case of A496
• Discovering the most elusive radio relic in the sky: Diffuse Shock Acceleration caught in the act?
• The LOFAR and JVLA view of the distant steep spectrum radio halo in MACS J1149.5+2223
• Radio fossils, relics, and haloes in Abell 3266: cluster archaeology with ASKAP-EMU and the ATCA
• Testing Secondary Models for the Origin of Radio Mini-Halos in Galaxy Clusters
• MWA and ASKAP observations of atypical radio-halo-hosting galaxy clusters: Abell 141 and Abell 3404
• The detection of cluster magnetic fields via radio source depolarisation
• A MeerKAT-meets-LOFAR Study of MS 1455.0+2232: A 590 kiloparsec 'Mini'-Halo in a Sloshing Cool-Core Cluster
• Recovering galaxy cluster gas density profiles with XMM-Newton and Chandra
• A 3.5 Mpc-long radio relic in the galaxy cluster ClG 0217+70
• Simulations of gas sloshing in galaxy cluster Abell 2052
• Tricolour: an optimized SumThreshold flagger for MeerKAT
• A LOFAR view into the stormy environment of the galaxy cluster 2A0335+096
• Surface brightness discontinuities in radio halos. Insights from the MeerKAT Galaxy Cluster Legacy Survey
• Diffuse radio emission in the galaxy cluster SPT-CL J2031-4037: a steep spectrum intermediate radio halo?
• The merging galaxy cluster Abell 3266 at low radio frequencies
• Diffuse radio emission from non-Planck galaxy clusters in the LoTSS-DR2 fields
• X-Ray Studies of the Abell 3158 Galaxy Cluster with eROSITA
• Anomalous gas in ESO 149-G003: A MeerKAT-16 View
• Mining Mini-Halos with MeerKAT I. Calibration and Imaging
• Spectral study of the diffuse synchrotron source in the galaxy cluster Abell 523

Cited by in corpus (9)

• The prototypical major cluster merger Abell 754. I. Calibration of MeerKAT data and radio/X-ray spectral mapping of the cluster
• Double radio relics and radio halo in the high redshift galaxy cluster El Gordo with the Upgraded GMRT
• Discovery of a circularly symmetric extended diffuse radio emission around an elliptical galaxy with the VLA FIRST survey
• A horseshoe-shaped ring of diffuse emission detected at 1.4 GHz
• Sloshing and spiral structures breeding a putative radio mini-halo in the environment of a cool-core cluster Abell 795
• MeerKAT discovery of GHz radio emission extending from Abell 3017 toward Abell 3016
• Relighting the fire in Hickson Compact Group (HCG) 15: magnetised fossil plasma revealed by the SKA Pathfinders & Precursors
• Wide-field GMRT imaging of X-shaped Radio-Galaxies: Spectral properties of 4C32.25 and 4C61.23
• Evidence of sloshing-driven mini-halo formation in the cool-core cluster RXCJ1558.3-1410