A5024438679- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Astrophysics and Star Formation Studies
- Radio Astronomy Observations and Technology
- Astrophysics and Cosmic Phenomena
- Scientific Research and Discoveries
- Molecular Spectroscopy and Structure
- Scientific Measurement and Uncertainty Evaluation
- Inorganic Fluorides and Related Compounds
- History and Developments in Astronomy
- Gamma-ray bursts and supernovae
- Nuclear physics research studies
- Sensor Technology and Measurement Systems
- Atmospheric Ozone and Climate
- Calibration and Measurement Techniques
- Astro and Planetary Science
- CCD and CMOS Imaging Sensors
- Optical Imaging and Spectroscopy Techniques
- Cosmology and Gravitation Theories
- Advanced Mathematical Theories and Applications
- Geophysics and Gravity Measurements
- Quantum Chromodynamics and Particle Interactions
Sapienza University of Rome
2016-2020
University of Rome Tor Vergata
1991-2020
Istituto Centrale per la Ricerca Scientifica e Tecnologica Applicata al Mare
2020
University of Bologna
2001
We introduce the THE THREE HUNDRED project, an endeavour to model 324 large galaxy clusters with full-physics hydrodynamical re-simulations. Here we present data set and study differences observations for fundamental cluster properties scaling relations. find that modelled are generally in reasonable agreement respect baryonic fractions gas relations at redshift z = 0. However, there still some (model-dependent) differences, such as central galaxies being too massive, colours (g - r) bluer...
The masses of galaxy clusters are a key tool to constrain cosmology through the physics large-scale structure formation and accretion. Mass estimates based on X-ray Sunyaev–Zel'dovich measurements have been found be affected by contribution non-thermal pressure components, due, e.g. kinetic gas energy. characterization possible ordered motions (e.g. rotation) intra-cluster medium could important recover cluster accurately. We update study rotation in maps effect, using large sample massive...
The determination of the morphology galaxy clusters has important repercussion on their cosmological and astrophysical studies. In this paper we address morphological characterisation synthetic maps Sunyaev--Zel'dovich (SZ) effect produced for a sample 258 massive ($M_{vir}>5\times10^{14}h^{-1}$M$_\odot$ at $z=0$), extracted from MUSIC hydrodynamical simulations. Specifically, apply five known parameters, already used in X-ray, two newly introduced ones, combine them together single...
We present a study on the coherent rotation of intracluster medium and dark matter components simulated galaxy clusters extracted from volume-limited sample MUSIC project. The set is re-simulated with three different recipes for gas physics: (i) non-radiative, (ii) radiative without active galactic nuclei (AGN) feedback (iii) AGN feedback. Our analysis based 146 most massive identified as relaxed, 57 per cent total sample. classify these objects rotating non-rotating according to spin...
We present the results of a redshift survey galaxies in A3528 complex, chain interacting clusters core Shapley Concentration. This complex is characterized X-ray band by two pairs roughly similar clumps: one pair has been resolved as optical Abell (A3530 and A3532), while components other are both associated with A3528. The data show that distance between centres A3530 A3532 smaller than their radii, an indication existence at least tidal interactions, contours appear to be elongated...
The imaging of galaxy clusters through the Sunyaev--Zel'dovich effect is a valuable tool to probe thermal pressure intra-cluster gas, especially in outermost regions where X-ray observations suffer from photon statistics. For first time, we produce maps Comptonization parameter by applying locally parametric algorithm for sparse component separation latest frequency released Planck. takes into account properties real cluster data two-component modelling spectral energy density dust, and...
Complementarily to X-ray observations, the thermal SZ effect is a powerful tool probe baryonic content of galaxy clusters from their core peripheries. While contaminations by astrophysical and instrumental backgrounds require us scan signal across various frequencies, multi-scale nature cluster morphologies observe such objects at angular resolutions. We developed component separation algorithms that take advantage sparse representations combine these heterogeneous pieces information,...
The NIKA2 Sunyaev-Zel’dovich Large Program (SZLP) is focused on mapping the thermal SZ signal of a representative sample selected Planck and ACT clusters spanning redshift range 0.5 < z 0.9. Hydrodynamical N-body simulations prove to be powerful tool endorse capabilities for estimating impact IntraCluster Medium (ICM) disturbances when re- covering pressure radial profiles. For this goal we employ subsample objects, carefully extracted from catalog Marenostrum MUltidark SImulations galaxy...
SYNOPSIS “Whole body composition” was investigated in 30 people subject to alcohol‐induced migraine. The control group matched for age, sex, height and weight, who were not migraine consumed moderate amounts of alcohol. following evaluated: anthropometric data, alcohol intake grams per day, total water, fat‐free mass, fat mass index (kg/m 2 ). Two methods measurement used: skin fold thickness evaluation, bioelectric impedance assay (BIA). BIA is a non‐invasive method based on the principle...
Abstract The Sunyaev-Zel’dovich effect in galaxy clusters is a unique probe for studying astrophysics and cosmology. We propose this work its application the detection of possible coherent rotational motions hot intra-cluster medium. select sample massive, relaxed rotating from Marenostrum-mUltidark SImulations Clusters (MUSIC), we produce mock maps temperature distortion produced by kinetic Sunyaev–Zel’dovich exploring six different lines sight, best observational condition. These are...
Multiwavelength observations of the hard X-ray selected sources by Chandra and XMM-Newton surveys have significantly improved our knowledge objects responsible background. A surprising finding is discovery a population optically dull, bright galaxies emerging at 2-10 keV fluxes order 10^{-14} erg cm^{-2} s^{-1}. We present preliminary results multiwavelength few serendipitously discovered in field intensively studied longer wavelengths.
We present preliminary results on the optical identifications of sources from High Energy Large Area Survey performed with XMM-Newton (HELLAS2XMM). This survey covers about 3 square degrees sky down to a 2-10 keV flux 7 x 10^-15 erg cm-2 s-1 (Baldi & Molendi these proceedings, Baldi et al. 2001). The good sensitivity over large area allows us confirm and extend previous Chandra population X-ray luminous but optically dull galaxies emerging at fluxes 10-14 s-1. Although statistics are still...
The Sunyaev–Zel’dovich effect is the ideal probe for investigating outskirts of galaxy clusters. To map this signal, we apply a spectral imaging technique which combines parametric component separation and sparse representations. Our procedure an improved version existing algorithm, now features better treatment astrophysical contaminants, implementation new beam deconvolution. We use most recent frequency maps delivered by Planck , consider clusters analysed in XMM Cluster Outskirts Project...
Recent X-ray surveys have clearly demonstrated that a population of optically dull, bright galaxies is emerging at fluxes the order 10-14 erg cm-2 s-1. The nature these objects still unknown. We present results multiwavelength observations what can be considered best studied example: Chandra source CXOUJ031238.9-765134 identified by Fiore et al. (2000) with an apparently normal galaxy z=0.159 and called ``Fiore P3''.