Diffuse radio emission from non-Planck galaxy clusters in the LoTSS-DR2 fields

Abstract

The presence of large-scale magnetic fields and ultra-relativistic electrons in the intra-cluster medium (ICM) is confirmed through the detection of diffuse radio synchrotron sources, so-called radio halos and relics. Due to their steep-spectrum nature, these sources are rarely detected at frequencies above a few GHz, especially in low-mass systems. The aim of this study is to discover and characterise diffuse radio sources in low-mass galaxy clusters in order to understand their origin and their scaling with host cluster properties. We searched for cluster-scale radio emission from low-mass galaxy clusters in the Low Frequency Array (LOFAR) Two-metre Sky Survey - Data Release 2 (LoTSS-DR2) fields. We made use of existing optical (Abell, DESI, WHL) and X-ray (comPRASS, MCXC) catalogues. The LoTSS-DR2 data were processed further to improve the quality of the images that are used to detect and characterize diffuse sources. We have detected diffuse radio emission in 28 galaxy clusters. The number of confirmed (candidates) halos and relics are six (seven) and 10 (three), respectively. Among these, 11 halos and 10 relics, including candidates, are newly discovered by LOFAR. Beside these, five diffuse sources are detected in tailed radio galaxies and are probably associated with mergers during the formation of the host clusters. We are unable to classify other 13 diffuse sources. We compare our newly detected, diffuse sources to known sources by placing them on the scaling relation between the radio power and the mass of the host clusters.

References in corpus (33)

• The LOFAR Two-metre Sky Survey - I. Survey Description and Preliminary Data Release
• The LOFAR Two-metre Sky Survey -- V. Second data release
• Diffuse Radio Emission from Galaxy Clusters
• Particle Acceleration on Megaparsec Scales in a Merging Galaxy Cluster
• Compressible Turbulence in Galaxy Clusters: Physics and Stochastic Particle Re-acceleration
• On the connection between giant radio halos and cluster mergers
• A low-frequency radio halo associated with a cluster of galaxies
• The LOFAR Two Meter Sky Survey: Deep Fields, I -- Direction-dependent calibration and imaging
• GMRT Radio Halo Survey in galaxy clusters at z = 0.2 -- 0.4. II.The eBCS clusters and analysis of the complete sample
• Giant Ringlike Radio Structures Around Galaxy Cluster Abell 3376
• Calibration of the optical mass proxy for clusters of galaxies and an update of the WHL12 cluster catalog
• Classifying Radio Galaxies with Convolutional Neural Network
• Double relics in Abell 2345 and Abell 1240: spectral index and polarization analysis
• A new double radio relic in PSZ1 G096.89+24.17 and a radio relic mass-luminosity relation
• Turbulence and Particle Acceleration in Giant Radio Haloes: the Origin of Seed Electrons
• Relativistic protons in the Coma galaxy cluster: first gamma-ray constraints ever on turbulent reacceleration
• The Planck clusters in the LOFAR sky. I. LoTSS-DR2: new detections and sample overview
• Radio halos in a mass-selected sample of 75 galaxy clusters. II. Statistical analysis
• MeerKAT view of the diffuse radio sources in Abell 3667 and their interactions with the thermal plasma
• VLA Radio Observations of the HST Frontier Fields Cluster Abell 2744: The Discovery of New Radio Relics
• Morphological classification of radio galaxies: Capsule Networks versus Convolutional Neural Networks
• Galaxy Clusters from the DESI Legacy Imaging Surveys. I. Cluster Detection
• Physical insights from the spectrum of the radio halo in MACS J0717.5+3745
• The contribution of discrete sources to the sky temperature at 144 MHz
• A Robust Model for Flux Density Calculations of Radio Halos in Galaxy Clusters: Halo-FDCA
• Discovery of a Supercluster in the eROSITA Final Equatorial Depth Survey: X-ray Properties, Radio Halo, and Double Relics
• Analytical model for cluster radio relics
• ComPRASS: a Combined Planck-RASS catalogue of X-ray-SZ clusters
• Downstream depolarization in the Sausage relic: a 1-4 GHz Very Large Array study
• Diffuse Radio Emission from Galaxy Clusters in the LOFAR Two-metre Sky Survey Deep Fields
• Radio relics in PSZ2 G096.88+24.18: A connection with pre-existing plasma
• Discovery of a radio halo (and relic) in a $M_{500}<2\times 10^{14}$ M${}_{\odot }$ cluster
• LOFAR Detection of a Low-Power Radio Halo in the Galaxy Cluster Abell 990

Cited by in corpus (8)

• The Planck clusters in the LOFAR sky VI. LoTSS-DR2: Properties of radio relics
• A MeerKAT-meets-LOFAR study of Abell 1413: a moderately disturbed non-cool-core cluster hosting a $\sim 500$ kpc 'mini'-halo
• Exploring diffuse radio emission in galaxy clusters and groups with the uGMRT and the SKA
• Limits and challenges of the detection of cluster-scale diffuse radio emission at high redshift: The Massive and Distant Clusters of WISE Survey (MaDCoWS) in LoTSS-DR2
• Optical/X-ray/radio view of Abell 1213: A galaxy cluster with anomalous diffuse radio emission
• Non-thermal emission in galaxy groups at extremely low frequency: the case of A1213
• New supernova remnant candidates in the LOFAR Two Metre Sky Survey
• Galaxy clusters in the LoTSS-DR3: Catalogues and detection pipeline for diffuse radio emission