A5083439797- Astrophysics and Cosmic Phenomena
- Galaxies: Formation, Evolution, Phenomena
- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Astronomy and Astrophysical Research
- Neutrino Physics Research
- Astronomical Observations and Instrumentation
- Pulsars and Gravitational Waves Research
- Particle Accelerators and Free-Electron Lasers
- Astrophysics and Star Formation Studies
- Radiation Detection and Scintillator Technologies
- Superconducting Materials and Applications
- Solar and Space Plasma Dynamics
- Magnetic confinement fusion research
- Ionosphere and magnetosphere dynamics
- Particle physics theoretical and experimental studies
- Methane Hydrates and Related Phenomena
- Electromagnetic Compatibility and Measurements
- Radio Wave Propagation Studies
- X-ray Spectroscopy and Fluorescence Analysis
- Electromagnetic Compatibility and Noise Suppression
- Scientific Computing and Data Management
Osservatorio di Astrofisica e Scienza dello Spazio
2018-2023
Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna
2011-2022
National Institute for Astrophysics
2010-2021
CTA Observatory
2021
University of Manitoba
2021
University of Bologna
2009-2019
Osservatorio astronomico di Bologna
2009-2018
Istituto Nazionale di Fisica Nucleare
2018
Institute for Space Astrophysics and Planetology
2016
Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata
2016
The Broad Line Radio Galaxy 3C 111, characterized by a Fanaroff-Riley II (FRII) radio morphology, is one of the sources Misaligned Active Galactic Nuclei sample, consisting Galaxies and Steep Spectrum Quasars, recently detected Fermi-Large Area Telescope. Our analysis 24-month gamma-ray light curve shows that 111 was only occasionally at high energies. It bright end 2008 faint, below Telescope sensitivity threshold, for rest time. A multifrequency campaign 3C~111, ongoing in same period,...
We present a new X-ray spectroscopic study of $22$ luminous ($2\times10^{45}\lesssim L_{\rm bol}\rm /erg\,s^{-1} \lesssim 2\times10^{46}$) active galactic nuclei (AGNs) at intermediate-redshift ($0.1 z 0.4$), as part the SUpermassive Black hole Winds in x-rAYS (SUBWAYS) sample, mostly composed quasars (QSOs) and type\,1 AGN. Here, 17 targets were observed with \textit{XMM-Newton} between 2019--2020 remaining 5 are from previous observations. The aim this large campaign ($1.45\,\rm Ms$...
In recent years, the jet formation region in active galaxies has been imaged through millimeter very long baseline interferometry (mm-VLBI) for a few ideal targets, particular, M,87. An important leap forward understanding launching could be taken by identifying larger number of suitable objects, characterized different accretion modes and powers. this article, we present 1,cm 7,mm VLBI data sample 16 poorly explored radio galaxies, comprising both high-excitation (HEGs) low-excitation...
We report on the second round of Chandra observations 3C snapshot survey developed to observe complete sample radio sources with z < 0.3 for 8 ks each. In first paper, we illustrated basic data reduction and analysis procedures performed 30 observed during Cycle 9, while here present remaining 27 12. measured X-ray intensity nuclei any hot spots jet features associated emission. fluxes in three energy bands, i.e., soft, medium, hard, all analyzed are also reported. For stronger nuclei,...
FR0s are compact radio sources that represent the bulk of Radio-Loud (RL) AGN population, but they still poorly understood. Pilot studies on these have been already performed at and optical wavelengths: here we present first X-ray study a sample 19 FR0 galaxies selected from SDSS/NVSS/FIRST Best & Heckman (2012), with redshift $\leq$ 0.15, size 10 kpc optically classified as low-excitation (LEG). The spectra modeled power-law component absorbed by Galactic column density with, in some cases,...
Fanaroff-Riley II low-excitation radio galaxies (FRII-LERGs) are characterized by weak nuclear excitation on pc-scales and properties typical of powerful FRIIs (defined as high-excitation, hereafter HERGs/BLRGs) kp-scales. Since a link between the accretion power produced jets is expected both from theory observations, their nature still debated. In this work we investigate X-ray complete sample 19 FRII-LERGs belonging to 3CR catalog, exploiting Chandra XMM-Newton archival data. We also...
We analyze VLT/MUSE observations of 37 radio galaxies from the Third Cambridge catalogue (3C) with redshift $<$0.3 searching for nuclear outflows ionized gas. These are part MURALES project (a MUse RAdio Loud Emission line Snapshot survey), whose main goal is to explore feedback process in most powerful radio-loud AGN. applied a nonparametric analysis [O~III] $\lambda$5007 emission line, asymmetries and high-velocity wings reveal signatures outflows. find evidence 21 sources, velocities...
We present the first X-ray dedicated study of galaxy cluster A795 and Fanaroff-Riley Type 0 hosted in its brightest galaxy. Using an archival 30 ks \textit{Chandra} observation we dynamical state cooling properties intracluster medium, investigate whether growth radio is prevented by surrounding environment. discover that a weakly cool core cluster, with observed mass deposition rate $\lessapprox 14\,$ M$_{\odot}$yr$^{-1}$ region (central $\sim$66 kpc). In inner $\sim$ kpc identify two...
We analyze Chandra observations of diffuse soft X-ray emission associated with a complete sample 3CR radio galaxies at z < 0.3. In this paper we focus on the properties spectroscopic sub-classes high excitation (HEGs) and broad line objects (BLOs). Among 33 HEGs detect extended (or possibly extended) in about 40% sources; fraction is even higher (8/10) restricting analysis to exposure times larger than 10 ks. 18 BLOs, seen only 2 objects; lower detection rate can be ascribed presence their...
PKS 0521-36 is an Active Galactic Nucleus (AGN) with uncertain classification. We investigate the properties of this source from radio to gamma rays. The broad emission lines in optical and UV bands steep spectrum indicate a possible classification as intermediate object between broad-line galaxies (BLRG) quasars (SSRQ). On pc-scales shows knotty structure similar misaligned AGN. core dominance gamma-ray are those estimated for other SSRQ BLRG detected rays, suggesting viewing angle respect...
The Large Area Telescope on board the Fermi Gamma-ray Space detected a strong gamma-ray flare 2011 May 15 from source identified as 4C 49.22, flat spectrum radio quasar also known S4 1150+49. This blazar, characterised by prominent radio-optical-X-ray jet, was in low activity state during first years of observations. Simultaneous observations quiescent, outburst and post-flare states were obtained Swift, Planck optical-IR-radio telescopes (INAOE, Catalina CSS, VLBA, Metsahovi). is observed...
We present observations of a complete sub-sample 20 radio galaxies from the Third Cambridge Catalog (3C) with redshift <0.3 obtained VLT/MUSE optical integral field spectrograph. These data have been as part survey MURALES (a MUse RAdio Loud Emission line Snapshot survey) main goal exploring Active Galactic Nuclei (AGN) feedback process in sizeable sample most powerful sources at low redshift. analysis and, for each source, resulting emission images and 2D gas velocity field. Thanks to their...
We present the analysis of five joint XMM-Newton/NuSTAR observations, 20 ks each and separated by 12 days, broad-line radio galaxy 3C 382. The data were obtained as part a campaign performed in September-October 2016 simultaneously with VLBA. their relation X-ray ones will be discussed following paper. source exhibits moderate flux variability UV/X-ray bands, limited spectral especially soft band. In agreement past we find presence warm absorber, an iron K$\alpha$ line no associated Compton...
Recent high-resolution measurements suggest that the soft X-ray spectrum of obscured Radio Galaxies (RG) exhibits signatures photoionised gas (e.g. 3C 445 and 33) similar to those observed in radio-quiet Active Galactic Nuclei (AGN). While warm absorbing covering a wide range temperature ionisation states have been detected about one half population nearby Seyfert 1 galaxies, no traces absorber reported date spectra Broad Line (BLRG). We present here first detection powerful FRII BLRG 382...
We review the soft X-ray properties of 3C 390.3, 120, 382 and 445, only Broad Line Radio Galaxies (BLRG) for which good quality gratings data are currently available.The XMM-Newton/RGS 390.3 120 were re-analyzed searching warm absorbers, already discovered in 445.We confirm absence ionized absorption features but find signatures outflowing gas (v out ∼ 10 2 km s -1 ) 390.3.Its absorber (Logξ erg cm , N H 20 -2 ), similar to that observed 382, is probably placed Narrow Regions.Its content...
NGC 6251 is a luminous radio galaxy ≈104 Mpc away that was detected significantly with the Fermi Gamma-ray Space Telescope, and before EGRET (onboard Compton Observatory). Different observational constraints favor nuclear origin for γ-ray emission. Here we present study of spectral energy distribution core 6251, give results modeling in one-zone synchrotron/SSC framework. The SSC model provides good description to emission but, as other misaligned sources, predicts lower Lorentz factor (Γ ~...
Ultra-fast outflows (UFO) appear to be common in local active galactic nuclei (AGN) and may powerful enough ($\dot{E}_{kin}$$\geq$1\% of L$_{bol}$) effectively quench the star formation their host galaxies. To test feedback models based on AGN outflows, it is mandatory investigate UFOs near peak activity, that is, at high-z where only a few studies are available date. produce Fe resonant absorption lines measured above $\approx$7 keV. The most critical problem detecting such features distant...
A new class of low-power compact radio sources with limited jet structures, named FR 0, is emerging from recent radio-optical surveys. This abundant population galaxies, five times more numerous than Is in the local Universe (z < 0.05), represent a potentially interesting target at high and very-high energies (greater 100 GeV), as demonstrated by single case Fermi detection. Furthermore, these galaxies have been recently claimed to contribute non-negligibly extra-galactic γ-ray background...
In March 2018, Mukherjee (2018) reported the detection by VERITAS of very-high-energy emission (VHE; > 100 GeV) from 3C 264. This is sixth, and second most distant, radio galaxy ever detected in TeV regime. this article we present a X-ray analysis jet We determine main physical parameters parsec-scale flow explore implications inferred kinematic structure for radiative models gamma-ray emitting jet. The data set comprised VLBI observations at 15 GHz MOJAVE program, cover time period ~2...
We investigate the X-ray spectral properties of 3C 33 by analyzing all observations available in <i>Chandra<i/> and <i>XMM-Newton<i/> archives. In this paper we present a complete analysis nuclear emission narrow-line radio galaxy. The broad-band spectrum is complex. Its hard part resembles that Seyfert 2 galaxies, which have heavily obscured continuum (<i>N<i/><sub>H<sub/> ~ 10<sup>23<sup/> cm<sup>-2<sup/>) prominent Fe K<i>α<i/> line. This represents radiation observed directly...
We present the final observations of a complete sample 37 radio galaxies from Third Cambridge Catalog (3C) with redshift <0.3 and declination <20 degrees obtained VLT/MUSE optical integral field spectrograph. These data were as part MURALES survey (a MUse RAdio Loud Emission line Snapshot survey) main goal exploring AGN feedback process in most powerful sources. analysis and, for each source, resulting emission images 2D gas velocity field. Thanks to such an unprecedented depth these reveal...
This is the sixth paper presenting results of MUse RAdio Loud Emission line Snapshot survey (MURALES). We observed 37 radio sources from 3C sample with z<0.3 and declination <20 degrees MUSE optical integral field spectrograph at VLT. here focus on properties extended emission regions (EELRs) that can be studied unprecedented detail thanks to depth these observations. Line in 10 FRIs is, most cases, confined within <4 kpc, while large-scale (>4 kpc) ionized gas seen all but two 26 FRIIs. It...
Abstract It is generally thought that FRII radio galaxies host thin optically thick disks, while FRIs are powered by advection-dominated accretion flows. Sources with an efficient engine classified as high-excitation (HERGs) and those inefficient motor low-excitation (LERGs). Recently, the study of down to mJy fluxes has cast serious doubts on LERG-FRI HERG-FRII correspondence, revealing many LERGs show morphologies. The FR catalogs recently compiled Capetti et al. Baldi have allowed us...
We present observations obtained with the VLT/MUSE optical integral field spectrograph of radio source 3C277.3, located at a redshift 0.085 and associated galaxy Coma A. An emission line region fully enshrouds double-lobed source, which is ~60 kpc x 90 in size. Based on ratios, we identified five compact knots gas ionization powered by young stars as far from host. The filaments surrounding are compatible fast shocks (with velocity 350-500 km/s), but contribution star formation occurring...