489 citations · 8k across the 203 of their papers we have counts for
56 papers · 1 filter
A low-frequency radio halo associated with a cluster of galaxies
G. Brunetti, S. Giacintucci, R. Cassano +7
Clusters of galaxies are the largest gravitationally bound objects in the Universe, containing about 10^15 solar masses of hot (10^8 K) gas, galaxies and dark matter in a typical v…
Are young radio sources in equipartition?
M. Orienti, D. Dallacasa
The knowledge of physical conditions in young radio sources is important for defining the framework of models describing radio source evolution. We investigate whether young radio…
The B3-VLA CSS sample. VII: WSRT Polarisation Observations and the Ambient Faraday Medium Properties Revisited
A. Rossetti, D. Dallacasa, C. Fanti +2
We present new polarisation observations at 13 cm, acquired using the Westerbork Synthesis Radio Telescope (WSRT), of 65 sources, from the B3-VLA sample of Compact Steep-Spectrum s…
Shock acceleration as origin of the radio relic in A521?
S. Giacintucci, T. Venturi, G. Macario +6
We present new high sensitivity observations of the radio relic in A521 carried out with the Giant Metrewave Radio Telescope at 327 MHz and with the Very Large Array at 4.9 and 8.5…
GMRT Radio Halo Survey in galaxy clusters at z = 0.2 -- 0.4. II.The eBCS clusters and analysis of the complete sample
T. Venturi, S. Giacintucci, D. Dallacasa +4
We present the results of the GMRT cluster radio halo survey. The main purposes of our observational project are to measure which fraction of massive galaxy clusters in the redshif…
Revised statistics of radio halos and the re-acceleration model
R. Cassano, G. Brunetti, T. Venturi +4
Aims. The statistical properties of radio halos can be used to discriminate among the possible models for their origin. Therefore an unbiased and exhaustive investigation in this d…
Constraining the nature of High Frequency Peakers. II. Polarization properties
M. Orienti, D. Dallacasa
Aims: The ``bright'' High Frequency Peakers (HFPs) sample is a mixture of blazars and intrinsically small and young radio sources. We investigate the polarimetric characteristics o…
Radio spectrum evolution and magnetic field in extreme GPS radio sources. The case of RXJ1459+3337
M. Orienti, D. Dallacasa
Aims: The knowledge of the properties of the youngest radio sources is very important in order to trace the earliest phase of the evolution of the radio emission. RXJ1459+3337, wit…
Cosmic rays and Radio Halos in galaxy clusters : new constraints from radio observations
G. Brunetti, T. Venturi, D. Dallacasa +4
Clusters of galaxies are sites of acceleration of charged particles and sources of non-thermal radiation. We report on new constraints on the population of cosmic rays in the Intra…
Radio morphology and spectral analysis of cD galaxies in rich and poor galaxy clusters
S. Giacintucci, T. Venturi, M. Murgia +5
We present a radio morphological study and spectral analysis for a sample of 13 cD galaxies in rich and poor clusters of galaxies.} Our study is based on new high sensitivity Giant…
Constraining the nature of High Frequency Peakers. I. The spectral variability
M. Orienti, D. Dallacasa, C. Stanghellini
We investigate the spectral characteristics of 51 candidate High Frequency Peakers (HFPs), from the ``bright'' HFP sample, in order to determine the nature of each object, and to o…
High sensitivity low frequency radio observations of cD galaxies
S. Giacintucci, T. Venturi, S. Bardelli +3
We present the GMRT 235 MHz images of three radio galaxies and 610 MHz images of two sources belonging to a complete sample of cD galaxies in rich and poor galaxy clusters. The ana…
The VVDS-VLA Deep Field: III. GMRT observations at 610 MHz and the radio spectral index properties of the sub-mJy population
M. Bondi, P. Ciliegi, T. Venturi +12
We present the low frequency (610 MHz) radio source counts of the VVDS-VLA field and investigate the radio spectral index properties of the sub-mJy population. We use new deep (r.m…
Constraining the spectral age of very asymmetric CSOs
M. Orienti, D. Dallacasa, C. Stanghellini
We constrain the spectral ages for two very asymmetric Compact Symmetric Objects (CSO) from the B3-VLA-CSS sample, and we investigate the role of the ambient medium potentially abl…
European VLBI Network observations of fourteen GHz-Peaked-Spectrum radio sources at 5 GHz
Liu Xiang, Cormac Reynolds, Richard Strom +1
We present the results of EVN polarization observations of fourteen GHz-Peaked-Spectrum (GPS) radio sources at 5 GHz. These sources were selected from bright GPS source samples and…
VLBA images of High Frequency Peakers
M. Orienti, D. Dallacasa, S. Tinti +1
We propose a morphological classification based on the parsec scale structure of fifty-one High Frequency Peakers (HFPs) from the ``bright'' HFP sample. VLBA images at two adjacent…
The cluster relic source in A521
S. Giacintucci, T. Venturi, S. Bardelli +3
We present high sensitivity radio observations of the merging cluster A521, at a mean redsfhit z=0.247. The observations were carried out with the GMRT at 610 MHz and cover a regio…
Resolving the Shocks in Radio Galaxy Nebulae: HST and Radio Imaging of 3C 171, 3C277.3 and PKS2250-41
Avanti Tilak, Christopher P. O'Dea, Clive Tadhunter +5
We present the results of HST/WFPC2 medium and narrow band imaging and VLA and MERLIN2 radio imaging of three powerful radio galaxies: 3C 171, 3C 277.3, and PKS 2250-41. We obtaine…
Extended emission around GPS radio sources
C. Stanghellini, C. P. O'Dea, D. Dallacasa +4
Extended radio emission detected around a sample of GHz Peaked Spectrum (GPS) radio sources is discussed. Evidence for extended emission which is related to the GPS source is found…
Spectral properties and origin of the radio halo in A3562
S. Giacintucci, T. Venturi, G. Brunetti +6
We present a new detailed multiband study of the merging cluster A3562, in the core of the Shapley Concentration Supercluster. We analyzed new, low frequency radio data performed a…
A Supernova Factory in Mrk 273?
M. Bondi, M-A. Perez-Torres, D. Dallacasa +1
We report on 1.6 and 5.0 GHz observations of the ultraluminous infrared galaxy (ULIRG) Mrk 273, using the European VLBI Network (EVN) and the Multi-Element Radio-Linked Interferome…
Multi-frequency VLBA observations of compact sources from the Peacock & Wall catalogue
A. Rossetti, F. Mantovani, D. Dallacasa +2
VLBA observations are presented for 6 compact radio sources selected from the Peacock & Wall catalogue. From the new morphological and spectral information 2 objects that in the Pe…
EVN observations of eleven GHz-Peaked-Spectrum radio sources at 2.3/8.4GHz
L. Xiang, D. Dallacasa, P. Cassaro +2
We present results of EVN observations of eleven GHz-Peaked-Spectrum (GPS) radio sources at 2.3/8.4 GHz. These sources are from the classical ''bright'' GPS source samples with pea…
A detailed study of the nuclear region of Mrk 273
M. Bondi, D. Dallacasa, M. A. Peerez Torres +1
We present 5 GHz EVN+MERLIN observations of the nuclear region of the ultra luminous infrared galaxy Mrk 273. These observations confirms the detection, on the mas scale, of two re…