Mattia Di Mauro
A5107231065- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Pulsars and Gravitational Waves Research
- Radio Astronomy Observations and Technology
- Cosmology and Gravitation Theories
- Galaxies: Formation, Evolution, Phenomena
- Neutrino Physics Research
- Astronomy and Astrophysical Research
- Astrophysical Phenomena and Observations
- Solar and Space Plasma Dynamics
- Astronomical Observations and Instrumentation
- Particle Accelerators and Free-Electron Lasers
- High-Energy Particle Collisions Research
- CCD and CMOS Imaging Sensors
- Scientific Research and Discoveries
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Geophysics and Gravity Measurements
- Radiation Therapy and Dosimetry
- Advanced Battery Technologies Research
- Electric and Hybrid Vehicle Technologies
- Magnetic confinement fusion research
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
2013-2024
Istituto Nazionale di Fisica Nucleare
2014-2024
Clemson University
2024
Polytechnic University of Turin
2024
University of Turin
2010-2023
Stockholm University
2021-2023
AlbaNova
2021-2023
Centre National de la Recherche Scientifique
2014-2023
Shanghai Jiao Tong University
2021-2023
Universidad de Guadalajara
2021-2023
We present the fourth Fermi Large Area Telescope catalog (4FGL) of gamma-ray sources. Based on first eight years science data from Gamma-ray Space mission in energy range 50 MeV to 1 TeV, it is deepest yet this range. Relative 3FGL catalog, 4FGL has twice as much exposure well a number analysis improvements, including an updated model for Galactic diffuse emission, and two sets light curves (1-year 2-month intervals). The includes 5064 sources above 4 sigma significance, which we provide...
Abstract The region around the Galactic Center (GC) is now well established to be brighter at energies of a few GeV than what expected from conventional models diffuse gamma-ray emission and catalogs known sources. We study excess using 6.5 yr data Fermi Large Area Telescope. characterize uncertainty GC spectrum morphology due uncertainties in cosmic-ray source distributions propagation, distribution interstellar gas Milky Way, potential contribution bubbles. also evaluate properties...
We present a catalog of sources detected above 10 GeV by the Fermi Large Area Telescope (LAT) in first 7 years data using Pass 8 event-level analysis. This is Third Catalog Hard Fermi-LAT Sources (3FHL), containing 1556 objects characterized - 2 TeV energy range. The sensitivity and angular resolution are improved factors 3 relative to previous LAT at same energies (1FHL). vast majority (79%) associated with extragalactic counterparts other wavelengths, including 16 located very high...
We present a catalog of sources detected above 50 GeV by the {\it Fermi}-Large Area Telescope (LAT) in 80 months data. The newly delivered Pass 8 event-level analysis allows detection and characterization GeV--2 TeV energy range. In this band, Fermi}-LAT has 360 sources, which constitute second hard (2FHL). improved angular resolution enables precise localization point ($\sim$1.7$'$ radius at 68 % C.~L.) spatially extended sources. find that 86 can be associated with counterparts other...
On 2015 June 16, Fermi-LAT observed a giant outburst from the flat spectrum radio quasar 3C 279 with peak $>100$ MeV flux of $\sim3.6\times10^{-5}\;{\rm photons}\;{\rm cm}^{-2}\;{\rm s}^{-1}$ averaged over orbital period intervals. It is historically highest $\gamma$-ray source including past EGRET observations, isotropic luminosity reaching $\sim10^{49}\;{\rm erg}\;{\rm s}^{-1}$. During outburst, Fermi spacecraft, which has an 95.4 min, was operated in special pointing mode to optimize...
We report on the search for spectral irregularities induced by oscillations between photons and axionlike-particles (ALPs) in γ-ray spectrum of NGC 1275, central galaxy Perseus cluster. Using 6 years Fermi Large Area Telescope data, we find no evidence ALPs exclude couplings above 5×10^{-12} GeV^{-1} ALP masses 0.5≲m_{a}≲5 neV at 95% confidence. The limits are competitive with sensitivity planned laboratory experiments, and, together other bounds, strongly constrain possibility that can...
We present version 2 of the DRAGON code designed for computing realistic predictions CR densities in Galaxy. The numerically solves interstellar transport equation (including inhomogeneous and anisotropic diffusion, either space momentum, advective energy losses), under conditions. new includes an updated numerical solver several models astrophysical ingredients involved equation. Improvements accuracy solution are proved against analytical solutions reference diffusion scenarios. novel...
We present a measurement of the cosmic-ray electron+positron spectrum between 7 GeV and 2 TeV performed with almost seven years data collected Fermi Large Area Telescope. find that is well fit by broken power law break energy at about 50 GeV. Above GeV, described single spectral index $3.07 \pm 0.02 \; (\text{stat+syst}) 0.04 (\text{energy measurement})$. An exponential cutoff lower than 1.8 excluded 95\% CL.
Fermipy is an open-source python framework that facilitates analysis of data collected by the Fermi Large Area Telescope (LAT). built on Science Tools, publicly available software suite provided NASA for LAT mission. provides a high-level interface analyzing in simple and reproducible way. The current feature set includes methods extracting spectral energy distributions lightcurves, generating test statistic maps, finding new source candidates, fitting position extension. leverages...
Abstract We present a search for spatial extension in high-latitude ( ) sources recent Fermi point source catalogs. The result is the High-Latitude Extended Sources Catalog, which provides extensions (or upper limits thereof) and likelihood profiles suite of tested morphologies. find 24 extended sources, 19 were not previously characterized as extended. These include that are potentially associated with supernova remnants star-forming regions. also found γ -ray emission vicinity Cen A radio...
The Milky Way dwarf spheroidal satellite galaxies (dSphs) are particularly intriguing targets to search for gamma rays from weakly interacting massive particle dark matter (DM) annihilation or decay. They nearby, DM-dominated, and lack significant emission standard astrophysical processes. Previous studies using the Fermi-Large Area Telescope (LAT) of DM-induced dSphs have provided most robust stringent constraints on DM cross section mass. We report here an analysis over 14 years LAT data...
The Fermi Large Area Telescope (LAT) Collaboration has recently released a catalog of 360 sources detected above 50 GeV (2FHL). This was obtained using 80 months data re-processed with Pass 8, the newest event-level analysis, which significantly improves acceptance and angular resolution instrument. Most 2FHL at high Galactic latitude are blazars. Using detailed Monte Carlo simulations, we measure, for first time, source count distribution, dN/dS, extragalactic γ-ray E>50 find that it is...
Gamma rays reveal the Universe's history How many stars have formed in Universe, and when did they do so? These fundamental questions are difficult to answer because there systematic uncertainties converting light we observe into total mass of galaxies. The Fermi-LAT Collaboration addressed these by exploiting way that gamma from distant blazars propagate through intergalactic space, which depends on amount emitted all collaboration found star formation peaked about 3 billion years after Big...
We present the fourth Fermi Large Area Telescope catalog (4FGL) of gamma-ray sources. Based on first eight years science data from Gamma-ray Space mission in energy range 50 MeV to 1 TeV, it is deepest yet this range. Relative 3FGL catalog, 4FGL has twice as much exposure well a number analysis improvements, including an updated model for Galactic diffuse emission, and two sets light curves (1-year 2-month intervals). The includes 5064 sources above 4 sigma significance, which we provide...
Active galactic nuclei (AGN) with jets seen at small viewing angles are the most luminous and abundant objects in $\gamma$-ray sky. AGN misaligned along line-of-sight appear fainter sky, but more numerous than brighter blazars. We calculate diffuse emission due to population of (MAGN) unresolved by Large Area Telescope (LAT) on {\it Fermi} Gamma-ray Space ({\it Fermi}). A correlation between luminosity radio-core is established demonstrated be physical statistical tests, as well compatible...
The cumulative emission resulting from hadronic cosmic-ray interactions in star-forming galaxies (SFGs) has been proposed as the dominant contribution to astrophysical neutrino flux at TeV PeV energies reported by IceCube. same particle also inevitably create $\gamma$-ray that could be detectable a component of extragalactic background (EGB), which is now measured with Fermi-LAT energy range 0.1 820 GeV. New studies blazar distribution above 50 GeV place an upper bound on residual non-blazar...
A new estimation of the isotropic diffuse gamma-ray background (IGRB) observed by Large Area Telescope (LAT) on board Fermi Gamma-ray Space (Fermi) has been presented for 50 months data, in energy range 100 MeV-820 GeV and different modelings Galactic foreground. We attempt here interpretation Fermi-LAT IGRB data terms unresolved emission from extragalactic populations. find very good fits to experimental IGRB, obtained with theoretical predictions active galactic nuclei star-forming...
Theoretical predictions for the cosmic antiproton spectrum currently fall short of corresponding experimental level accuracy. Among main sources uncertainty are production cross sections in ray inelastic interactions. We analyse existing data on $pp$ scattering, including first time measurements performed by NA49 Collaboration. compute finding that energy range where available (antiproton energies about 4-550 GeV) different approaches lead to almost equivalent results, with an 10-20\%....
We perform a combined analysis of the recent AMS-02 data on electrons, positrons, electrons plus positrons and positron fraction, in self-consistent framework where we realize theoretical modeling all astrophysical components that can contribute to observed fluxes whole energy range. The primary electron contribution is modeled through sum an average flux from distant sources local supernova remnants Green catalog. secondary originate interactions interstellar medium cosmic rays, for which...
The excess of $\gamma$ rays in the data measured by Fermi-LAT from Galactic center region is one most intriguing mysteries Astroparticle Physics. This (GCE), has been with respect to different interstellar emission models (IEMs), source catalogs, selections and techniques. Although several proposed interpretations have appeared literature, there are not firm conclusions as its origin. main difficulty solving this puzzle lies modeling a such complexity thus precisely measuring characteristics...
A majority of the $\gamma$-ray emission from star-forming galaxies is generated by interaction high-energy cosmic rays with interstellar gas and radiation fields. Star-forming are expected to contribute both extragalactic background IceCube astrophysical neutrino flux. Using roughly 10\,years data taken {\it Fermi} Large Area Telescope, in this study we constrain properties galaxies. We report detection 11 bona-fide emitting 2 candidates. Moreover, show that cumulative below-threshold also...
Understanding the isotopic composition of cosmic rays (CRs) observed near Earth represents a milestone towards identification their origin. Local fluxes contain all known stable and long-lived isotopes, reflecting complex history primaries secondaries as they traverse interstellar medium. For that reason, numerical code which aims at describing CR transport in Galaxy must unavoidably rely on accurate modelling production secondary particles. In this work we provide detailed description...
The HAWC Collaboration has discovered a $\ensuremath{\gamma}$-ray emission extended about 2 degrees around the Geminga and Monogem pulsar wind nebulae (PWNe) at energies ${E}_{\ensuremath{\gamma}}>5\text{ }\text{ }\mathrm{TeV}$. We analyze, for first time, almost 10 years of data obtained with Fermi Large Area Telescope ${E}_{\ensuremath{\gamma}}>8\text{ }\mathrm{GeV}$ in direction Monogem. Since these two pulsars are close to Galactic plane we run our analysis ten different interstellar...
An excess of $\gamma$ rays in the data measured by Fermi Large Area Telescope direction Galactic center has been reported several publications. This excess, labeled as (GCE), is detected analyzing with different interstellar emission models, point source catalogs and analysis techniques. The characteristics GCE, recently unprecedented precision, are all compatible dark matter particles (DM) annihilating main halo our Galaxy, even if other interpretations still not excluded. We investigate DM...