A5066095120- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Stellar, planetary, and galactic studies
- Scientific Research and Discoveries
- Astrophysics and Star Formation Studies
- Astrophysical Phenomena and Observations
- Ionosphere and magnetosphere dynamics
- Advanced Materials Characterization Techniques
- Electromagnetic Launch and Propulsion Technology
- Superconducting Materials and Applications
- Cosmology and Gravitation Theories
- Particle Accelerators and Free-Electron Lasers
- Electric Motor Design and Analysis
- High-pressure geophysics and materials
- Astro and Planetary Science
- Gamma-ray bursts and supernovae
- Aluminum Alloy Microstructure Properties
- Geophysics and Gravity Measurements
- Nuclear physics research studies
- Precipitation Measurement and Analysis
National Institute for Astrophysics
2023-2024
Istituto di Astrofisica Spaziale e Fisica Cosmica di Milano
2024
University of Insubria
2023-2024
AREA Science Park
2024
Thüringer Landessternwarte Tautenburg
2024
Context. Clusters of galaxies are known to be turbulent environments, whether they merging systems where turbulence is injected via the conversion gravitational potential energy into intracluster medium (ICM), or relaxed in which small-scale core sloshing occurring within well. In many such systems, diffuse radio sources associated with ICM found: haloes and mini-haloes. Aims. Abell 2142 a rich cluster undergoing an extreme episode sloshing, has given rise four cold fronts complex...
The "Cluster HEritage project with \xmm: Mass Assembly and Thermodynamics at the Endpoint of structure formation" (CHEX-MATE) is a multi-year Heritage program, to obtain homogeneous XMM-Newton observations representative sample 118 galaxy clusters. are tuned reconstruct distribution main thermodynamic quantities ICM up $R_{500}$ individual mass measurements, via hydrostatic-equilibrium equation, precision 15-20%. Temperature profiles necessary ingredient for scientific goals it thus crucial...
We investigate the statistical properties and origin of scatter within spatially resolved surface brightness profiles CHEX-MATE sample, formed by 118 galaxy clusters selected via SZ effect. These objects have been drawn from Planck catalogue cover a wide range masses, M$_{500}=[2-15] \times 10^{14} $M$_{\odot}$, redshift, z=[0.05,0.6]. derived emission measure determined full sample. found that there is critical scale, R$\sim 0.4 R_{500}$, which morphologically relaxed disturbed object...
The connection between the thermal and non-thermal properties in galaxy clusters hosting radio halos seems fairly well established. However, a comprehensive analysis of such has only been done for integrated quantities (e.g. L X − P relation). In recent years, new-generation telescopes have enabled unprecedented possibility to study on spatially resolved basis. this work, we performed pilot investigate mentioned five targets by combining X-ray data from CHEX-MATE project with second release...
The intra-cluster medium is prone to turbulent motion that will contribute the non-thermal heating of gas, complicating use galaxy clusters as cosmological probes. Indirect approaches can estimate intensity and structure motions by studying associated fluctuations in gas density X-ray surface brightness. In this work, we aim constrain occurring CHEX-MATE sample obtain a detailed view their properties large population clusters. To do so, simulation-based approach parameters power spectrum...
X-ray observations of galaxy clusters are routinely used to derive radial distributions intracluster medium (ICM) thermodynamical properties, such as density and temperature. However, only allow access quantities projected on the celestial sphere, so an assumption three-dimensional distribution ICM is necessary. Usually, spherical geometry assumed. The aim this paper determine bias due approximation reconstruction profile a cluster sample intrinsic scatter profiles' particularly when...
The thermal and non-thermal components in galaxy clusters have properties that, although shaped from different physical phenomena, can share some similarities, mainly driven by their halo mass the accretion processes. Scaling relations been proven to exist for both studied X-ray (thermal) radio (non-thermal) bands. On side, integrated spatially resolved profiles shown a predictable correlated behaviour. At wavelength, such investigations are so far limited quantities (e.g. total power mass)....
The massive, hot galaxy cluster PSZ2 G286.98+32.90 (hereafter PLCKG287, z=0.383) hosts a giant radio halo and two prominent relics that are signs of disturbed dynamical state. Gravitational lensing analysis shows complex core with multiple components. However, despite optical observations indicating clear merger, the X-ray emission cluster, derived from XMM-Newton observations, only moderate disturbance. aim this work is to study properties investigate heating such massive by searching for...
Observations with modern radio interferometers are uncovering the intricate morphology of synchrotron sources in galaxy clusters, both those arising from intracluster medium and associated member galaxies. Moreover, addition to well-known tails active galactic nuclei, continuum jellyfish galaxies being efficiently detected nearby clusters groups. Our goal is investigate emission a massive sloshing cluster local Universe (z=0.0296) that hosts diffuse mini halo at its center. To achieve this,...
ABSTRACT We report on the detection of diffuse radio emission with peculiar morphology in central region galaxy cluster Abell 2657. The most striking feature identified our 144 MHz LOFAR image is a bifurcated arc that extends for projected size 150−200 kpc. From analysis XMM-Newton data, we find clear evidence gas sloshing and possible dip X-ray surface brightness between two arcs which deserves confirmation. Interestingly, synchrotron stretched along spiral. compare observational results...
The connection between the thermal and non-thermal properties in galaxy clusters hosting radio halos seems fairly well established. However, a comprehensive analysis of such has been made only for integrated quantities (e.g. $L_X - P_{radio}$ relation). In recent years new-generation telescopes have enabled unprecedented possibility to study on spatially resolved basis. Here, we perform pilot investigate mentioned five targets, by combining X-ray data from CHEX-MATE project with second...
Aims. The goal of this work is to devise a description the enrichment process in large-scale structure that explains available observations and makes predictions for future measurements. Methods. We took spartan approach study, employing observational results algebra connect stellar assembly star-forming halos with metal intra-cluster group medium. Results. On one hand, our construct first provide an explanation much phenomenology clusters groups. It sheds light on lack redshift evolution...
Aims. The goal of this work is to devise a description the enrichment process in large-scale structure that explains available observations and makes predictions for future measurements. Methods. We took spartan approach study, employing observational results algebra connect stellar assembly star-forming halos with metal intra-cluster group medium. Results. On one hand, our construct first provide an explanation much phenomenology clusters groups. It sheds light on lack redshift evolution...
We present a detailed study of the gas and galaxy properties cluster PSZ2 G282.28+49.94 detected in Planck all-sky survey. The intracluster medium (ICM) this object at z=0.56 exhibits cometary-like shape. Combining Chandra TNG observations, we characterised spatially resolved thermodynamical spatial velocity distribution 73 members. structure is quite complex with an elongated core region containing two brightest galaxies one dense group to south-east. Since there no difference between...
The clusters Abell 2061 and 2067 in the Corona Borealis supercluster have been studied at different radio frequencies are both known to host diffuse emission. aim of this work is investigate emission between them, whose presence suggested by low-resolution observations. We analysed deep LOw Frequency ARray (LOFAR) High Band Antenna (HBA) observations 144 MHz follow up on possible inter-cluster filament previous 1.4 GHz investigated radial profiles point-to-point surface-brightness...
We characterise the entropy profiles of 32 very high mass ($M_{500}>7.75\times10^{14}~M_{\odot}$) galaxy clusters (HIGHMz), selected from CHEX-MATE sample, to study intracluster medium (ICM) distribution in a regime where non-gravitational effects are minimised. Using XMM-Newton measurements, we measure up ~$R_{500}$ for all objects. The scaled exhibit large dispersion central regions, but converge rapidly expectation pure gravitational collapse beyond core. quantify correlation between ICM...
We present a detailed study of the gas and galaxy properties cluster PSZ2 G282.28+49.94 detected in Planck all-sky survey. The intracluster medium (ICM) this object at z=0.56 exhibits cometary-like shape. Combining Chandra TNG observations, we characterised spatially resolved thermodynamical spatial velocity distribution 73 members. structure is quite complex with an elongated core region containing two brightest galaxies one dense group to south-east. Since there no difference between...
The clusters Abell 2061 and 2067 in the Corona Borealis supercluster have been studied at different radio frequencies are both known to host diffuse emission. aim of this work is investigate emission between them, suggested by low resolution observations. We analyse deep LOFAR HBA observations 144 MHz follow up on possible intercluster filament previous 1.4 GHz radial profiles point-to-point surface brightness correlation A2061 with Xray observations, describe nature report detection 800 kpc...
We characterise the intracluster gas entropy profiles of 32 very high-mass ( M 500 > 7.75 × 10 14 ⊙ ) Planck SZ-detected galaxy clusters (HIGHMz), selected from CHEX-MATE sample, allowing us to study medium (ICM) distribution in a regime where non-gravitational effects are expected be minimised. Using XMM- Newton measurements, we determined up ∼ R for all objects. assessed relative role density and temperature measurements on uncertainty reconstruction, showing that outer regions largest...
X-ray observations of galaxy clusters are routinely used to derive radial distributions ICM thermdynamical properties such as density and temperature. However, allow us access quantities projected on the celestial sphere only, so that an assumption 3D distribution is necessary. Usually, spherical geometry assumed. The aim this paper determine bias due approximation reconstruction profile a sample intrinsic scatter profiles distribution, when substructures not masked. We 98 simulated for...
Galaxy cluster mergers are natural consequences of the structure formation in Universe. Such events involve a large amount energy ($\sim 10^{63}$ erg) dissipated during process. Part this can be channelled particle acceleration and magnetic field amplification, enhancing non-thermal emission intra- inter-cluster environment. Recently, low-frequency observations have detected bridge diffuse synchrotron connecting two merging galaxy clusters, Abell 399 401. result provides clear observational...
Galaxy cluster mergers are natural consequences of structure formation in the Universe. Such events involve dissipation a large amount energy (∼10 63 erg) during process. Part this can be channelled particle acceleration and magnetic field amplification, enhancing non-thermal emission intra- intercluster environment. Recently, low-frequency observations led to detection bridge diffuse synchrotron connecting two merging galaxy clusters, Abell 399 401. This result provides clear observational...
We report on the detection of diffuse radio emission with peculiar morphology in central region galaxy cluster Abell 2657. The most striking feature identified our 144 MHz LOFAR image is a bifurcated arc that extends for projected size 150-200 kpc. From analysis XMM-Newton data, we find clear evidence gas sloshing and possible dip X-ray surface brightness between two arcs which deserves confirmation. Interestingly, synchrotron stretched along spiral. compare observational results numerical...