Radio and X-ray diffuse emission in six clusters of galaxies

By F. Govoni, L. Feretti, G. Giovannini, H. Böhringer, T. Reiprich, M. Murgia. 2001

183 citations recorded by the source corpus.

Deep Very Large Array radio observations confirm the presence of halo and relic sources in six clusters of galaxies (A115, A520, A773, A1664, A2254, A2744) where a wide diffuse emission was previously found in the NRAO VLA Sky Survey. New images at 1.4 GHz of these six clusters of galaxies are presented and X-ray data obtained from the ROSAT archive are analyzed. The properties of clusters hosting radio halos and relics are analyzed and discussed. A correlation between the halo radio power and the cluster gravitational mass is presented.

Subfields: Astronomy and Astrophysics, Instrumentation, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/cec0b559c2f549df2affe63f2aa5bbd3a9d789fe

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Citations in the corpus

Magnetic fields and Faraday rotation in clusters of galaxies (2004, background): “The spatial correlation found in some clusters between the X-ray and the radio halo brightness (Govoni et al. 2001c) suggests that thermal and nonthermal (relativistic particles and magnetic fields) energy densities could have the same radial scaling.”
Radio signature of cosmological structure formation shocks (2006, background): “We analysed the relics in A115, A 2256, and A3667 and found that the shocks have Mach numbers in the range of 3 to 5.”
Cosmic ray transport in galaxy clusters: implications for radio halos, gamma-ray signatures, and cool core heating (2010, background): “(However, Govoni et al. 2001a, find that the naively expected radio halo profile does not seem to fit the observed asymptotic in case of weak magnetic fields (B < 3 μG).)”
Diffuse Radio Emission from Galaxy Clusters (2019, background): “…al. (2014) SPT-CL J0245-5302 0.300 cdRS Zheng et al. (2018) Abell 2552 0.305 cH Kale et al. (2015) Abell 2744 0.308 H, mRS Giovannini et al. (1999); Govoni et al. (2001b) Bacchi et al. (2003); Orrú et al. (2007) Venturi et al. (2013); Pearce et al. (2017) George et al. (2017); Duchesne et al.…”
Cluster Mergers and Non-Thermal Phenomena: A Statistical Magneto-Turbulent Model (2004, background): “In addition correlations between the radio power of radio haloes at 1.4 GHz and the bolometric X-ray luminosity, temperature and mass of the parent clusters have been found (Colafrancesco 1999; Liang et al. 2000; Govoni et al. 2001; Giovannini & Feretti 2002).”
Cluster Magnetic Fields (2001, background): “Finally in A514, Govoni et al. (2001b) has measured the RM distributions of 5 embedded (and background) radio sources and found cluster magnetic field strengths of 4–9 µG spread over the central 1.4 Mpc of the cluster.”
Bow Shock and Radio Halo in the Merging Cluster A520 (2004, background): “Radio Edge A520 has a prominent radio halo (Govoni et al. 2001), whose brightness contours are overlaid on the X-ray image in Figure 1b. G04 already noted a remarkable coincidence of the southwest edge of the radio halo with the shocklike X-ray feature, although at that time it was not clear…”