Publications (95)
Observations of extended radio emission in clusters
C. Ferrari, F. Govoni, S. Schindler +2
We review observations of extended regions of radio emission in clusters; these include diffuse emission in `relics', and the large central regions commonly referred to as `halos'.…
Discovery of the correspondence between intra-cluster radio emission and a high pressure region detected through the Sunyaev-Zel'dovich effect
C. Ferrari, H. T. Intema, E. Orrù +9
We analyzed new 237 MHz and 614 MHz GMRT data of the most X-ray luminous galaxy cluster, RX J1347-1145. Our radio results are compared with the MUSTANG 90 GHz Sunyaev-Zel'dovich ef…
Radio galaxies and magnetic fields in A514
F. Govoni, G. B. Taylor, D. Dallacasa +2
A514 contains six extended and polarized radio sources located at various projected distances from the cluster center. Here we present a detailed study of these six radio sources i…
Sardinia Radio Telescope observations of the Coma Cluster
M. Murgia, F. Govoni, V. Vacca +25
We present deep total intensity and polarization observations of the Coma cluster at 1.4 and 6.6 GHz performed with the Sardinia Radio Telescope. By combining the single-dish 1.4 G…
Revealing the magnetic field in a distant galaxy cluster: discovery of the complex radio emission from MACS J0717.5 +3745
A. Bonafede, L. Feretti, G. Giovannini +7
Aims. To study at multiple frequencies the radio emission arising from the massive galaxy cluster MACS J0717.5+3745 (z=0.55). Known to be an extremely complex cluster merger, the s…
Strong evidence of Anomalous Microwave Emission from the flux density spectrum of M31
E. S. Battistelli, S. Fatigoni, M. Murgia +21
We have observed the Andromeda galaxy, Messier 31 (M31), at 6.7GHz with the Sardinia Radio Telescope. We mapped the radio emission in the C-band, re-analyzed WMAP and Planck maps,…
The spectral index image of the radio halo in the cluster Abell 520 hosting a famous bow shock
V. Vacca, L. Feretti, G. Giovannini +4
Synchrotron radio emission is being detected from an increasing number of galaxy clusters. Spectral index images are a powerful tool to investigate the origin, nature, and connecti…
Radio and X-ray diffuse emission in six clusters of galaxies
F. Govoni, L. Feretti, G. Giovannini +3
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 emi…
The mm-to-cm SED of spiral galaxies. Synergies between NIKA2 and SRT instruments
S. Bianchi, M. Murgia, A. Melis +9
The mm-to-cm range of the Spectral Energy Distribution of spiral galaxies remains largely unexplored. Its coverage is required to disentangle the contribution of dust emission, fre…
High angular resolution Sunyaev Zel'dovich observations: the case of MISTRAL
E. S. Battistelli, E. Barbavara, P. de Bernardis +25
The MIllimeter Sardinia radio Telescope Receiver based on Array of Lumped elements kids, MISTRAL, is a millimetric () multipixel camera being built for the Sardinia R…
Fractional polarization and magnetic fields in the ICM
A. Bonafede, F. Govoni, L. Feretti +3
The aim of this work is to investigate the average properties of the intra-cluster medium (ICM) magnetic fields, and to search for possible correlations with the ICM thermal proper…
The optical properties of low redshift radio galaxies
F. Govoni, R. Falomo, G. Fasano +1
We present morphological and photometric properties of 79 low redshift (z<0.12) radio galaxies extracted from two radio flux limited samples of radio sources. All objects are image…
Observations of the galaxy cluster CIZA J2242.8+5301 with the Sardinia Radio Telescope
F. Loi, M. Murgia, F. Govoni +25
We observed the galaxy cluster CIZA J2242.8+5301 with the Sardinia Radio Telescope to provide new constraints on its spectral properties at high frequency. We conducted observation…
The recurrent nuclear activity of Fornax A and its interaction with the cold gas
F. M. Maccagni, P. Serra, M. Murgia +3
Sensitive (noise \Jyb), high-resolution () MeerKAT observations of Fornax A show that its giant lobes have a double-shell morphology, where dense filaments…
The intracluster magnetic field power spectrum in A2199
V. Vacca, M. Murgia, F. Govoni +4
We investigate the magnetic field power spectrum in the cool core galaxy cluster A2199 by analyzing the polarized emission of the central radio source 3C338. The polarized radiatio…
The large-scale diffuse radio emission in A781
F. Govoni, M. Murgia, G. Giovannini +2
A781 belongs to a complex system characterized by extended X-ray emissions that may form part of line of clusters of galaxies along a filament. The aim of this work is to investiga…
Measurements and simulation of Faraday rotation across the Coma radio relic
A. Bonafede, F. Vazza, M. Brüggen +5
The aim of this work is to probe the magnetic field properties in relics and infall regions of galaxy clusters using Faraday Rotation Measures. We present Very Large Array multi-fr…
Magnetic Fields and Faraday Rotation in Clusters of Galaxies
M. Murgia, F. Govoni, L. Feretti +5
We present a numerical approach to investigate the relationship between magnetic fields and Faraday rotation effects in clusters of galaxies. We can infer the structure and strengt…
Chandra Temperature Maps for Galaxy Clusters with Radio Halos
F. Govoni, M. Markevitch, A. Vikhlinin +3
We analyze Chandra temperature maps for a sample of clusters with high quality radio halo data, to study the origin of the radio halos. The sample includes A520, A665, A754, A773,…
The radio galaxies and the magnetic field in Abell 119
L. Feretti, D. Dallacasa, F. Govoni +3
We present new, multiwavelength Very Large Array observations of the 3 radio galaxies in the cluster Abell 119: 0053-015, 0053-016 and 3C 29. The first two radio galaxies, which li…
The intracluster magnetic field power spectrum in Abell 2382
D. Guidetti, M. Murgia, F. Govoni +5
The goal of this work is to put constraints on the strength and structure of the magnetic field in the cluster of galaxies A2382. We investigate the relationship between magnetic f…
Radio multifrequency observations of galaxy clusters. The Abell 399401 pair
C. D. Nunhokee, G. Bernardi, S. Manti +9
Galaxy clusters are assembled via merging of smaller structures, in a process that generates shocks and turbulence in the intra cluster medium and produces radio diffuse emission i…
A joint XMM-NuSTAR observation of the galaxy cluster Abell 523: constraints on Inverse Compton emission
F. Cova, F. Gastaldello, D. R. Wik +17
We present the results of a joint XMM-Newton and NuSTAR observation (200 ks) of the galaxy cluster Abell 523 at . The peculiar morphology of the cluster radio halo and its…
The intracluster magnetic field power spectrum in Abell 2255
F. Govoni, M. Murgia, L. Feretti +3
The goal of this work is to constrain the strength and structure of the magnetic field in the nearby cluster of galaxies A2255. At radio wavelengths A2255 is characterized by the p…
Magnetic Fields in the 3C 129 Cluster
G. B. Taylor, F. Govoni, S. A. Allen +1
We present multi-frequency VLA observations of the two radio galaxies 3C 129 and 3C 129.1 embedded in a luminous X-ray cluster. These radio observations reveal a substantial differ…
The dynamical state of A548 from XMM-Newton data: X-ray and radio connection
L. Solovyeva, S. Anokhin, L. Feretti +5
We present a detailed study of the X-ray properties of the galaxy cluster Abell 548b (z=0.04), using XMM-Newton data, and discuss the connection between the thermal properties and…
Diffuse radio sources in the cluster of galaxies Abell 548b
L. Feretti, M. Bacchi, O. B. Slee +4
We report extensive VLA and ATCA observations of the two diffuse radio sources in the cluster of galaxies Abell 548b, which confirm their classification as relics. The two relics (…
New scaling relations in cluster radio halos and the re-acceleration model
R. Cassano, G. Brunetti, G. Setti +2
In this paper we derive new expected scaling relations for clusters with giant radio halos in the framework of the re-acceleration scenario in a simplified, but physically motivate…
Low-Frequency study of two clusters of galaxies: A2744 and A2219
E. Orru', M. Murgia, L. Feretti +6
Spectral index images can be used to constraint the energy spectrum of relativistic electrons and magnetic field distribution in radio halos and relics, providing useful informatio…
A giant radio halo in the low luminosity X-ray cluster Abell 523
G. Giovannini, L. Feretti, M. Girardi +4
Radio halos are extended and diffuse non-thermal radio sources present at the cluster center, not obviously associated with any individual galaxy. A strong correlation has been fou…
Bow shock and radio halo in the merging cluster A520
M. Markevitch, F. Govoni, G. Brunetti +1
Chandra observations of the merging galaxy cluster A520 reveal a prominent bow shock with M=2.1+0.4-0.3. This is only the second clear example of a substantially supersonic merger…
The black hole mass of low redshift radiogalaxies
D. Bettoni, R. Falomo, G. Fasano +1
We make use of two empirical relations between the black hole mass and the global properties (bulge luminosity and stellar velocity dispersion) of nearby elliptical galaxies, to in…
Rotation Measures of Radio Sources in Hot Galaxy Clusters
F. Govoni, K. Dolag, M. Murgia +6
The goal of this work is to investigate the Faraday rotation measure (RM) of radio galaxies in hot galaxy clusters in order to establish a possible connection between the magnetic…
Diffuse radio emission in a REFLEX cluster
L. Feretti, P. Schuecker, H. Boehringer +2
Deep Very Large Array radio observations are presented for the REFLEX clusters RXCJ0437.1+0043 and RXCJ1314.4-2515. They are at similar distance and show similar X-ray luminosity,…
Radio halos in nearby (z < 0.4) clusters of galaxies
G. Giovannini, A. Bonafede, L. Feretti +4
The Intra-Cluster Medium is characterized by thermal emission, and by the presence of large scale magnetic fields. In some clusters of galaxies a diffuse non-thermal emission is al…
Study of the thermal and nonthermal emission components in M31: the Sardinia Radio Telescope view at 6.6 GHz
S. Fatigoni, F. Radiconi, E. S. Battistelli +21
The Andromeda galaxy is the best-known large galaxy besides our own Milky Way. Several images and studies exist at all wavelengths from radio to hard X-ray. Nevertheless, only a fe…
The flickering nuclear activity of Fornax A
F. M. Maccagni, M. Murgia, P. Serra +13
We present new observations of Fornax A taken at 1 GHz with the MeerKAT telescope and at 6 GHz with the Sardinia Radio Telescope (SRT). The sensitive (noise ~16 micro-Jy beam$^{-1}…
The giant radio source 0917+75: Origin and properties
G. Giovannini, N. Biava, M. Girardi +11
Context. Several author have studied the giant radio source GRS0917 + 75 , but its origin remains unclear. Aims. This source is unusual, because of its large size and its location…
Detection of diffuse radio emission at large distance from the center of the galaxy cluster A2255
R. F. Pizzo, A. G. de Bruyn, L. Feretti +1
Low-frequency radio observations of galaxy clusters are the key to detecting the diffuse extended emission associated with them. The presence and properties of such radio sources i…
Duty cycle of the radio galaxy B2 0258+35
M. Brienza, R. Morganti, M. Murgia +14
Radio loud Active Galactic Nuclei are episodic in nature, cycling through periods of activity and quiescence. In this work we investigate the duty cycle of the radio galaxy B2~0258…
Collimated synchrotron threads linking the radio lobes of ESO137-006
M. Ramatsoku, M. Murgia, V. Vacca +14
We present MeerKAT 1000 MHz and 1400 MHz observations of a bright radio galaxy in the southern hemisphere, ESO~137-006. The galaxy lies at the centre of the massive and merging Nor…
Double relics in Abell 2345 and Abell 1240: spectral index and polarization analysis
A. Bonafede, G. Giovannini, L. Feretti +2
The aim of the present work is to study the radio properties of double relics in Abell 1240 and Abell 2345 in the framework of double relic formation models. We present new Very La…
Simulations of the polarized radio sky and predictions on the confusion limit in polarization for future radio surveys
F. Loi, M. Murgia, F. Govoni +4
Numerical simulations offer the unique possibility to forecast the results of surveys and targeted observations that will be performed with next generation instruments like the Squ…
Hard X-ray and radio observations of Abell 754
R. Fusco-Femiano, M. Orlandini, S. De Grandi +5
We present a long BeppoSAX observation of Abell 754 that reports a nonthermal excess with respect to the thermal emission at energies greater than ~45 keV. A VLA radio observation…
Diffuse Radio Sources in a Statistically Complete Sample of High Redshift Galaxy Clusters
G. Giovannini, M. Cau, A. Bonafede +9
Non-thermal properties of galaxy clusters have been studied with detailed and deep radio images in comparison with X-ray data. While much progress has been made, most of the studie…
Structure of the magnetoionic medium around the FR Class I radio galaxy 3C 449
D. Guidetti, R. A. Laing, M. Murgia +3
The goal of this work is to constrain the strength and structure of the magnetic field associated with the environment of the radio source 3C 449, using observations of Faraday rot…
A double radio halo in the close pair of galaxy clusters Abell 399 and Abell 401
M. Murgia, F. Govoni, L. Feretti +1
Radio halos are faint radio sources usually located at the center of merging clusters of galaxies. These diffuse radio sources are rare, having so far been found only in about 30 c…
Constraints on the magnetic field in the hadronic scenario for the origin of the radio halo in the A1795 galaxy cluster
P. Marchegiani, V. Vacca, F. Loi +2
The radio halo in the cool-core galaxy cluster, A1795, has recently been proposed to be of hadronic origin, because it extends on megaparsec scales, where no turbulence is expected…
GMRT observations of the Ophiuchus galaxy cluster
M. Murgia, D. Eckert, F. Govoni +4
VLA observations at 1477 MHz revealed the presence of a radio mini-halo surrounding the faint central point-like radio source in the Ophiuchus cluster of galaxies. In this work we…
First Sardinia Radio Telescope detection of the Sunyaev-Zel'dovich effect at 18.6 GHz
S. Cocchi, F. Loi, M. Murgia +5
Galaxy clusters imprint a distinctive signature on the cosmic microwave background through the thermal Sunyaev-Zel'dovich (SZ) effect, which enables to study the intracluster plasm…
SKA-Athena Synergy White Paper
R. Cassano, R. Fender, C. Ferrari +35
The Advanced Telescope for High Energy Astrophysics (Athena) is the X-ray observatory large mission selected by the European Space Agency (ESA), within its Cosmic Vision 2015-2025…
Comparative analysis of the diffuse radio emission in the galaxy clusters A1835, A2029, and Ophiuchus
M. Murgia, F. Govoni, M. Markevitch +4
We recently performed a study of a sample of relaxed, cooling core galaxy clusters with deep Very Large Array observations at 1.4 GHz. We find that in the central regions of A1835,…
The Sardinia Radio Telescope: From a Technological Project to a Radio Observatory
I. Prandoni, M. Murgia, A. Tarchi +43
[Abridged] The Sardinia Radio Telescope (SRT) is the new 64-m dish operated by INAF (Italy). Its active surface will allow us to observe at frequencies of up to 116 GHz. At the mom…
A perfect power-law spectrum even at highest frequencies: The Toothbrush relic
K. Rajpurohit, F. Vazza, M. Hoeft +12
Radio relics trace shock fronts generated in the intracluster medium (ICM) during cluster mergers. The particle acceleration mechanism at the shock fronts is not yet completely und…
Detection of continuum radio emission associated with Geminga
A. Pellizzoni, F. Govoni, P. Esposito +2
A deep Very Large Array observation of the Geminga pulsar field led to the discovery, at a higher than 10 sigma significance level, of radio emission trailing the neutron star prop…
Searching for Anomalous Microwave Emission in nearby galaxies. K-band observations with the Sardinia Radio Telescope
S. Bianchi, M. Murgia, A. Melis +9
We observed four nearby spiral galaxies (NGC 3627, NGC 4254, NGC 4736 and NGC 5055) in the K band with the 64-m Sardinia Radio Telescope, with the aim of detecting the Anomalous Mi…
Observations of a nearby filament of galaxy clusters with the Sardinia Radio Telescope
V. Vacca, M. Murgia, F. Govoni +29
We report the detection of diffuse radio emission which might be connected to a large-scale filament of the cosmic web covering a 8deg x 8deg area in the sky, likely associated wit…
Correlation of the magnetic field and the intra-cluster gas density in galaxy clusters
K. Dolag, S. Schindler, F. Govoni +1
We present a correlation between X-ray surface brightness and Faraday rotation measure in galaxy clusters, both, from radio and X-ray observations as well as from modeling of the i…
Sardinia Radio Telescope observations of Abell 194 - the intra-cluster magnetic field power spectrum
F. Govoni, M. Murgia, V. Vacca +30
We study the intra-cluster magnetic field in the poor galaxy cluster Abell 194 by complementing radio data, at different frequencies, with data in the optical and X-ray bands. We a…
Chandra observations of dying radio sources in galaxy clusters
M. Murgia, M. Markevitch, F. Govoni +4
The dying radio sources represent a very interesting and largely unexplored stage of the active galactic nucleus (AGN) evolution. They are considered to be very rare, and almost al…
The diffuse radio filament in the merging system ZwCl 2341.1+0000
G. Giovannini, A. Bonafede, L. Feretti +2
In some clusters of galaxies, a diffuse non-thermal emission is present, not obviously associated with any individual galaxy. These sources have been identified as relics, mini-hal…
A Comparison of Radio and X-Ray Morphologies of Four Clusters of Galaxies Containing Radio Halos
F. Govoni, T. A. Ensslin, L. Feretti +1
Clusters of galaxies may contain cluster-wide, centrally located, diffuse radio sources, called halos. They have been found to show morphologies similar to those of the X-ray emiss…
The intracluster magnetic field power spectrum in Abell 665
V. Vacca, M. Murgia, F. Govoni +4
The goal of this work is to investigate the power spectrum of the magnetic field associated with the giant radio halo in the galaxy cluster A665. For this, we present new deep Very…
In search of dying radio sources in the local universe
P. Parma, M. Murgia, H. R. de Ruiter +3
Up till now very few dying sources were known, presumably because the dying phase is short at centimeter wavelengths. We therefore have tried to improve the statistics on sources t…
Observing galaxy clusters and the cosmic web through the Sunyaev Zel'dovich effect with MISTRAL
E. S. Battistelli, E. Barbavara, P. de Bernardis +33
Galaxy clusters and surrounding medium, can be studied using X-ray bremsstrahlung emission and Sunyaev Zel'dovich (SZ) effect. Both astrophysical probes, sample the same environmen…
A multiwavelength view of the galaxy cluster Abell 523 and its peculiar diffuse radio source
M. Girardi, W. Boschin, F. Gastaldello +7
We study the structure of the galaxy cluster Abell 523 (A523) at z=0.104 using new spectroscopic data for 132 galaxies acquired at the Telescopio Nazionale Galileo, new photometric…
Constraints on dark matter annihilation and turbulent reacceleration set by high-frequency observations of the radio halo in the Coma cluster
P. Marchegiani, V. Vacca, F. Govoni +2
We study the impact of the recent observation of the radio halo in the Coma galaxy cluster at 6.6 GHz with the Sardinia Radio Telescope on models based on turbulent reacceleration…
A radio ridge connecting two galaxy clusters in a filament of the cosmic web
F. Govoni, E. Orrù, A. Bonafede +26
Galaxy clusters are the most massive gravitationally bound structures in the Universe. They grow by accreting smaller structures in a merging process that produces shocks and turbu…
Dying Radio Sources in Clusters
M. Murgia, P. Parma, K. -H. Mack +6
We present the study of five `dying' nearby radio galaxies belonging to the WENSS minisurvey and to the B2 bright catalogs: WNB1734+6407, WNB1829+6911, WNB1851+5707, B2 0120+33, an…
Unravelling the origin of large-scale magnetic fields in galaxy clusters and beyond through Faraday Rotation Measures with the SKA
A. Bonafede, F. Vazza, M. Brüggen +12
We investigate the possibility for the SKA to detect and study the magnetic fields in galaxy clusters and in the less dense environments surrounding them using Faraday Rotation Mea…
New radio halos and relics in clusters of galaxies
G. Giovannini, L. Feretti, F. Govoni +2
We present here new images of relics and halo sources in rich cluster of galaxies and the correlation between the halo radio surface brightness versus the cluster bolometric X-ray…
Detection of diffuse radio emission in the galaxy clusters A800, A910, A1550, and CL1446+26
F. Govoni, C. Ferrari, L. Feretti +5
Radio halos are elusive sources located at the center of merging galaxy clusters. To date, only about 40 radio halos are known, thus the discovery of new halos provide important in…
The Coma cluster magnetic field from Faraday rotation measures
A. Bonafede, L. Feretti, M. Murgia +5
The aim of the present work is to constrain the Coma cluster magnetic field strength, its radial profile and power spectrum by comparing Faraday Rotation Measure (RM) images with n…
Cosmic rays in magnetized intracluster plasma
L. Feretti, A. Bonafede, G. Giovannini +2
Recent results are reported on Magnetic Fields in Clusters of Galaxies, Diffuse Radio Emission, and Radio - X-ray connection in Radio Halos.
The giant radio halo in Abell 2163
L. Feretti, R. Fusco-Femiano, G. Giovannini +1
New radio data is presented for the rich cluster Abell 2163. The cluster radio emission is characterized by the presence of a radio halo, which is one of the most powerful and exte…
The MeerKAT Fornax Survey -- I. Survey description and first evidence of ram pressure in the Fornax galaxy cluster
P. Serra, F. M. Maccagni, D. Kleiner +22
The MeerKAT Fornax Survey maps the distribution and kinematics of atomic neutral hydrogen gas (HI) in the nearby Fornax galaxy cluster using the MeerKAT telescope. The 12 deg^2 sur…
Cluster magnetic fields through the study of polarized radio halos in the SKA era
F. Govoni, M. Murgia, H. Xu +17
Galaxy clusters are unique laboratories to investigate turbulent fluid motions and large scale magnetic fields. Synchrotron radio halos at the center of merging galaxy clusters pro…
Low-frequency study of two giant radio galaxies: 3C35 and 3C223
E. Orrù, M. Murgia, L. Feretti +5
Radio galaxies with a projected linear size > 1 Mpc are classified as giant radio sources. According to the current interpretation these are old sources which have evolved in a low…
The Multi-Wavelength Environment of Second Bologna Catalog Sources
A. Paggi, F. Massaro, H. Peña-Herazo +11
We present the first results of the Chandra Cool Targets (CCT) survey of the Second Bologna Catalog (B2CAT) of powerful radio sources, aimed at investigating the extended X-ray emi…
Non thermal emission from galaxy clusters: radio halos
L. Feretti, G. Brunetti, G. Giovannini +2
The number of diffuse radio halos in clusters of galaxies has grown in recent years, making it possible to derive statistical properties of these sources and of the hosting cluster…
A search for diffuse radio emission in the relaxed, cool-core galaxy clusters A1068, A1413, A1650, A1835, A2029, and Ophiuchus
F. Govoni, M. Murgia, M. Markevitch +4
We analyze sensitive, high-dynamic-range, observations to search for extended, diffuse, radio emission in relaxed and cool-core galaxy clusters. We performed deep 1.4 GHz Very Larg…
High significance detection at 4.8 GHz of the radio halo in the Coma galaxy cluster with the Sardinia Radio Telescope
P. Marchegiani, M. Murgia, F. Loi +4
We present the results of observations of the radio halo in the Coma galaxy cluster at 4.8 GHz performed with the Sardinia Radio Telescope. The radio halo in this cluster is detect…
Sardinia Radio Telescope wide-band spectral-polarimetric observations of the galaxy cluster 3C 129
M. Murgia, F. Govoni, E. Carretti +27
We present new observations of the galaxy cluster 3C 129 obtained with the Sardinia Radio Telescope in the frequency range 6000-7200 MHz, with the aim to image the large-angular-sc…
The nature of the giant diffuse non-thermal source in the A3411-A3412 complex
G. Giovannini, V. Vacca, M. Girardi +3
VLA deep radio images at 1.4 GHz in total intensity and polarization reveal a diffuse non-thermal source in the interacting clusters A3411 - A3412. Moreover a small-size low power…
Observations of the galaxy cluster CL 0217+70 and its surrounding region at 1.4 GHz with the Sardinia Radio Telescope
P. Marchegiani, V. Vacca, F. Govoni +3
We present the results of observations performed with the Sardinia Radio Telescope (SRT) at 1.3-1.8 GHz of the galaxy cluster CL 0217+70 and a region aroun…
The MeerKAT Fornax Survey
P. Serra, W. J. G. de Blok, G. L. Bryan +18
We present the science case and observations plan of the MeerKAT Fornax Survey, an HI and radio continuum survey of the Fornax galaxy cluster to be carried out with the SKA precurs…
Discovery of diffuse emission in the galaxy cluster A1689
V. Vacca, F. Govoni, M. Murgia +5
The aim of this work is to investigate the possible presence of extended diffuse synchrotron radio emission associated with the intracluster medium of the complex galaxy cluster A1…
Optical/X-ray/radio view of Abell 1213: A galaxy cluster with anomalous diffuse radio emission
W. Boschin, M. Girardi, S. De Grandi +5
Context. Abell 1213, a low-richness galaxy system, is known to host an anomalous radio halo detected in data of the VLA. It is an outlier with regard to the relation between the ra…
Galaxy cluster magnetic fields from radio polarized emission
A. Bonafede, L. Feretti, M. Murgia +3
The presence of magnetic fields in the intra-cluster medium of galaxy clusters is now well estabilished. It is directly revealed by the presence of cluster-wide radio sources: radi…
Deep images of cluster radio halos
M. Bacchi, L. Feretti, G. Giovannini +1
New radio data are presented for the clusters A401, A545, A754, A1914, A2219 and A2390, where the presence of diffuse radio emission was suggested from the images of the NRAO VLA S…
Polarization of cluster radio halos with upcoming radio interferometers
F. Govoni, M. Murgia, H. Xu +5
Synchrotron radio halos at the center of merging galaxy clusters provide the most spectacular and direct evidence of the presence of relativistic particles and magnetic fields asso…
Relativistic plasma and ICM/radio source interaction
L. Feretti, G. Giovannini, F. Govoni +1
The first detection of a diffuse radio source in a cluster of galaxies, dates back to the 1959 (Coma Cluster, Large et al. 1959). Since then, synchrotron radiating radio sources ha…
The Fundamental Plane of Radio Galaxies
D. Bettoni, R. Falomo, G. Fasano +3
We collected photometrical and dynamical data for 73 low red-shift (z<0.2) Radio Galaxies (LzRG) in order to study their Fundamental Plane (FP). For 22 sources we also present new…
Optical surface photometry of radio galaxies - II. Observations and data analysis
F. Govoni, R. Falomo, G. Fasano +1
Optical imaging observations for 50 radio galaxies are presented. For each object isophotal contours, photometric profiles, structural parameters (position angle, ellipticity, Four…
Magnetic Fields in Clusters of Galaxies Obtained Through the Study of Faraday Rotation Measures
F. Govoni, L. Feretti, M. Murgia +3
We are developing a new approach to investigate cluster magnetic field strengths and structures. It is based on the comparison of simulated Rotation Measure and radio halo images,…