163 citations · 1k across the 42 of their papers we have counts for
42 papers
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…
Application of Bayesian Statistical Tools to SKA Telescopes Polarization Surveys to Study Magnetization of the Large-scale Structure of the Universe
Valentina Vacca, Sebastian Hutschenreuter, Andrea Cabriolu +18
Understanding cosmological magnetic fields requires a detailed knowledge of magnetism in the different environments of the large-scale structure of the Universe. Magnetic fields ar…
Study of Polarized Emission in Radio Halos and Filaments in the SKA Telescopes Era
Valentina Vacca, Federica Govoni, Matteo Murgia +12
Synchrotron diffuse emission in merging galaxy clusters and along filaments connecting them demonstrates the presence of relativistic particles and magnetic fields in these environ…
The Impact of Dense RM Grids on the Study of Intra-cluster and Intra-group Magnetic Fields
Francesca Loi, Valentina Vacca, Shane P. O'Sullivan +8
The presence of diffuse radio sources in galaxy clusters and the recent discovery of polarized signals associated with the tails of a jellyfish galaxy indicates that intra-cluster/…
An SKA-Low RM Grid for constraining the origin of cosmic magnetism
Shane P. O'Sullivan, Franco Vazza, Ettore Carretti +2
Understanding the origin and evolution of cosmic magnetic fields is a key science goal for the SKAO. Recent advances in metre-wavelength (m-) Faraday rotation measure (RM) grids…
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…
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…
The MeerKAT Fornax Survey IV. A close look at the cluster physics through the densest rotation measure grid
Francesca Loi, Paolo Serra, Matteo Murgia +5
Using the Square Kilometre Array (SKA) mid precursor MeerKAT, we acquired broadband spectro-polarimetric data in the context of the MeerKAT Fornax Survey to study the Fornax cluste…
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…
Filaments in and between galaxy clusters at low and mid-frequency with the SKA telescope
Valentina Vacca, Federica Govoni, Matteo Murgia +6
Understanding the magnetised Universe is a major challenge in modern astrophysics, and cosmic magnetism has been acknowledged as one of the science key drivers of the most ambitiou…
The First High Frequency Technosignature Search Survey with the Sardinia Radio Telescope
Lorenzo Manunza, Alice Vendrame, Luca Pizzuto +30
The quest for radio signals from technologically-advanced extraterrestrial intelligence has traditionally concentrated on the vicinity of 1.4 GHz. In this paper, we extend the sear…
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…
A MeerKAT-meets-LOFAR study of Abell 1413: a moderately disturbed non-cool-core cluster hosting a kpc 'mini'-halo
C. J. Riseley, N. Biava, G. Lusetti +12
Many relaxed cool-core clusters host diffuse radio emission on scales of hundreds of kiloparsecs: mini-haloes. However, the mechanism responsible for generating them, as well as th…
New filamentary remnant radio emission and duty cycle constraints in the radio galaxy NGC 6086
S. Candini, M. Brienza, A. Bonafede +6
Radio galaxies are a subclass of active galactic nuclei in which accretion onto the supermassive black hole releases energy via relativistic jets. The jets are not constantly activ…
NGC 1436: the making of a lenticular galaxy in the Fornax cluster
Alessandro Loni, Paolo Serra, Marc Sarzi +25
We study the evolutionary path of the Fornax cluster galaxy NGC1436, which is known to be currently transitioning from a spiral into a lenticular morphology. This galaxy hosts a…
The MeerKAT Fornax Survey II. The rapid removal of HI from dwarf galaxies in the Fornax cluster
D. Kleiner, P. Serra, F. M. Maccagni +12
We present MeerKAT Fornax Survey atomic hydrogen (HI) observations of the dwarf galaxies located in the central ~2.5 x 4 deg of the Fornax galaxy cluster. The HI images present…
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…
A 600 kpc complex radio source at the center of Abell 3718 discovered by the EMU and POSSUM surveys
F. Loi, M. Brienza, C. J. Riseley +10
Multifrequency studies of galaxy clusters are crucial for inferring their dynamical states and physics. Moreover, these studies allow us to investigate cluster-embedded sources, wh…
Puzzling large-scale polarization in the galaxy cluster Abell 523
Valentina Vacca, Federica Govoni, Matteo Murgia +13
Large-scale magnetic fields reveal themselves through diffuse synchrotron sources observed in galaxy clusters such as radio halos. Total intensity filaments of these sources have b…
The thermal and non-thermal components within and between galaxy clusters Abell 399 and Abell 401
Federico Radiconi, Valentina Vacca, Elia Battistelli +28
We measure the local correlation between radio emission and Compton- signal across two galaxy clusters, Abell~399 and Abell~401, using maps from the Low-Frequency Array (LOFAR)…
The extended HI halo of NGC 4945 as seen by MeerKAT
Roger Ianjamasimanana, B. S. Koribalski, Gyula I. G. Józsa +20
Observations of the neutral atomic hydrogen (HI) in the nuclear starburst galaxy NGC 4945 with MeerKAT are presented. We find a large amount of halo gas, previously missed by HI ob…
A depolarizing HI tidal tail in the western lobe of Fornax A
Francesca Loi, Paolo Serra, Matteo Murgia +8
Recent MeerKAT neutral hydrogen (HI) observations of Fornax A reveal tidal material intersecting in projection the western lobe of this radio galaxy. We found a spatial coincidence…
Spectral study of the diffuse synchrotron source in the galaxy cluster Abell 523
Valentina Vacca, Timothy Shimwell, Richard A. Perley +26
The galaxy cluster Abell 523 (A523) hosts an extended diffuse synchrotron source historically classified as a radio halo. Its radio power at 1.4 GHz makes it one of the most signif…
A MeerKAT-meets-LOFAR Study of MS 1455.0+2232: A 590 kiloparsec 'Mini'-Halo in a Sloshing Cool-Core Cluster
C. J. Riseley, K. Rajpurohit, F. Loi +13
Radio mini-haloes are poorly-understood, moderately-extended diffuse radio sources that trace the presence of magnetic fields and relativistic electrons on scales of hundreds of ki…