Halo and relic sources in clusters of galaxies

By G. Giovannini, L. Feretti. 2000

163 citations recorded by the source corpus.

Abstract New images of 7 radio halos and relics, obtained with the Very Large Array at 20 or 90 cm, are presented here. The existence of a cluster-wide radio halo in the clusters A 665 and CL 0016+16 is confirmed. Both these clusters share the properties of the other clusters with radio halos, i.e. are luminous in X-rays, have high temperature, and show recent merger processes. No diffuse sources are detected in a sample of clusters showing at least a tailed radio galaxy within 300 kpc from the cluster center, indicating that the connection between tailed radio galaxies and halos is not relevant. For these clusters we give limits to the surface brightness and to the angular size of possible undetected diffuse sources.

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

View Paper: https://www.semanticscholar.org/paper/3f3f482556c579c1c15a4a8426976e6c2d52af1d

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Citations in the corpus

EGRET Upper Limits on the High-Energy Gamma-Ray Emission of Galaxy Clusters (2003, background): “…the prediction that galaxy clusters might be emitters of highenergy gamma-rays: • the existence of diffuse radio halos (Giovannini et al. 1993, 1999; Giovannini & Feretti 2000; Kempner & Sarazin 2001), • the rather controversially discussed observations of EUV excess emission in galaxy clusters…”
What is a cool-core cluster? a detailed analysis of the cores of the X-ray flux-limited HIFLUGCS cluster sample (2009, background): “Of these eight, for two (A401 and A2142) the detections seem unlikely (Giovannini & Feretti 2000), three (A85, A133 and A4038) are small scale (a few tens of kpc) relics associated with nearby radio galaxies (e.g Slee et al. 2001a) and one (MKW8) as identified as a possible relic as seen in the VLA…”
Four Extreme Relic Radio Sources in Clusters of Galaxies (2001, methodology): “The A85 relic has been imaged by Giovannini & Feretti (2000) at 333 MHz with 20′′ resolution.”
Determining the Cosmic Distance Scale from Interferometric Measurements of the Sunyaev-Zeldovich Effect (2002, background): “According to the literature (Kempner & Sarazin 2001; Giovannini & Feretti 2000; Giovannini et al. 1999), the following clusters in our sample exhibit radio halos: Cl0016, A773, A2163, A520, A665, A2218.”
Cosmic-Ray Electrons in Groups and Clusters of Galaxies: Primary and Secondary Populations from a Numerical Cosmological Simulation (2001, background): “From its spectral properties and, sometimes, polarization signatures the radio emission is interpreted as synchrotron radiation, implying the presence of CR electrons 233 and magnetic Ðelds (Kim et al. 1989, 1990 ; Giovannini et al. 1993 ; Deiss et al. 1997 ; Giovannini & Feretti 2000).”
A systematic study of X-ray substructure of galaxy clusters detected in the ROSAT All-Sky Survey ? (2001, background): “Recent lists of these objects can be found in, e.g., Feretti (1999), Giovannini (1999), Giovannini et al. (1999), Owen et al. (1999), and Giovannini & Feretti (2000).”
Diffuse Radio Emission from Galaxy Clusters (2019, background): “…z classification notes references Abell 1612 0.179 RS/F van Weeren et al. (2011b); Kierdorf et al. (2017) Abell 665 0.182 H Giovannini et al. (1999); Giovannini & Feretti (2000) Kempner & Sarazin (2001); Feretti et al. (2004b) Vacca et al. (2010); Rudnick & Lemmerman (2009) Abell 1689 0.183 H…”
On the Nonthermal Emission and Acceleration of Electrons in Coma and Other Clusters of Galaxies (2001, background): “The Ðrst of these to be discovered in just a few clusters, notably in the Coma Cluster (for the most recent observations see Giovannini & Feretti 2000), was the di†used (socalled halo) radio emission of luminosity ergsL R D 1041 s~1 in the frequency range 30 MHz\ l \ 4 GHz, whose source must be…”
Cluster Magnetic Fields (2001, methodology): “A complete (flux limited) sample of X-ray clusters shows only 5% to 9% of the sources are detected at the surface brightness limits of the NVSS of 2.3 mJy beam−1, where the beam has FWHM = 45′′(Giovannini & Feretti 2000; Feretti et al. 2001).”
Cosmological Shock Waves and Their Role in the Large-Scale Structure of the Universe (2003, background): “A number of clusters have been found with diffuse synchrotron radio halos or/and radio relic sources, indicating the existence of relativistic electron populations in intracluster medium (ICM) (see, e.g., Giovannini & Feretti 2000; Feretti 2003).”
On the Origin of Radio Halos in Galaxy Clusters (2001, methodology): “With the completion of the NRAO VLA Sky Survey (Condon et al. 1998) the number of candidate radio halos has risen to approximately 20 (Giovannini, Tordi, & Feretti 1999; Giovannini & Feretti 2000; Liang et al. 2000).”