The peculiar cluster MACS J0417.5-1154 in the C and X-bands

Abstract

We present 5.5 and 9.0 GHz Australia Telescope Compact Array (ATCA) observations of the cluster MACSJ0417.5-1154, one of the most massive galaxy clusters and one of the brightest in X-ray in the Massive Cluster Survey (MACS). We estimate diffuse emission at 5.5 and 9.0 GHz from our ATCA observations, and compare the results with the 235 MHz and 610 MHz GMRT observations and 1575 MHz VLA observations. We also estimate the diffuse emission at low frequencies from existing GLEAM survey data (using the MWA telescope), and find that the steepening reported in earlier studies may have been an artefact of underestimates of diffuse emission at low frequencies. High-frequency radio observations of galaxy cluster mergers therefore provide an important complement to low-frequency observations, not only for a probing the `on' and `off' state of radio halos in these mergers, but also to constrain energetics of cluster mergers. We comment on the future directions that further studies of this cluster can take.

arXiv comment15 pages, 6 figures, accepted for publication in Ap&SS

References in corpus (17)

• The GMRT 150 MHz All-sky Radio Survey: First Alternative Data Release TGSS ADR1
• Clusters of galaxies : observational properties of the diffuse radio emission
• Cosmic rays in galaxy clusters and their non-thermal emission
• GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey I: A low-frequency extragalactic catalogue
• The Expanded Very Large Array -- a New Telescope for New Science
• The Australia Telescope Compact Array Broadband Backend (CABB)
• GLEAM: The GaLactic and Extragalactic All-sky MWA survey
• Weighing the Giants - III. Methods and Measurements of Accurate Galaxy Cluster Weak-Lensing Masses
• A low-frequency radio halo associated with a cluster of galaxies
• The X-ray brightest clusters of galaxies from the Massive Cluster Survey
• Re-acceleration Model for Radio Relics with Spectral Curvature
• Curved Radio Spectra of Weak Cluster Shocks
• The highest-frequency detection of a radio relic: 16-GHz AMI observations of the `Sausage' cluster
• Turbulent Cosmic Ray Reacceleration at Radio Relics and Halos in Clusters of Galaxies
• A study of diffuse radio sources and X-ray emission in six massive clusters
• First detection at 5.5 and 9 GHz of the radio relics in bullet cluster with ATCA
• Re-acceleration model for the `Sausage' Radio Relic

Cited by in corpus (4)

• Diffuse Radio Emission from Galaxy Clusters
• The MeerKAT Galaxy Cluster Legacy Survey I. Survey Overview and Highlights
• RELICS: Strong Lensing Analysis of MACS J0417.5-1154 and Predictions for Observing the Magnified High-Redshift Universe with JWST
• The core of the massive cluster merger MACS J0417.5-1154 as seen by VLT/MUSE