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We develop a new spectral model for the broadband spectral energy distribution (SED) of Active Galactic Nuclei (AGN). This includes an outer standard disc, an inner warm Comptonising region to produce the soft X-ray excess and a hot corona.…

High Energy Astrophysical Phenomena · Physics 2018-08-01 Aya Kubota , Chris Done

An incremental version of the fourth catalog of active galactic nuclei (AGNs) detected by the Fermi-Large Area Telescope is presented. This version (4LAC-DR3) derives from the third data release of the 4FGL catalog based on 12 years of E>50…

High Energy Astrophysical Phenomena · Physics 2023-01-25 LAT collaboration , Marco Ajello , Luca Baldini , Jean Ballet , Denis Bastieri , Josefa Becerra Gonzalez , Ronaldo Bellazzini , Alessandra Berretta , Elisabetta Bissaldi , Raffaella Bonino , Ari Brill , Philippe Bruel , Sara Buson , Regina Caputo , Patrizia Caraveo , Teddy Cheung , Graziano Chiaro , Nicolo Cibrario , Stefano Ciprini , Milena Crnogorcevic , Sara Cutini , Filippo D'Ammando , Salvatore De Gaetano , Niccolo Di Lalla , Leonardo Di Venere , Alberto Dominguez , Vandad Fallah Ramazani , Elizabeth Ferrara , Alessio Fiori , Yasushi Fukazawa , Stefan Funk , Piergiorgio Fusco , Viviana Gammaldi , Fabio Gargano , Simone Garrappa , Dario Gasparrini , Nico Giglietto , Francesco Giordano , Marcello Giroletti , David Green , Isabelle Grenier , Sylvain Guiriec , Deirdre Horan , Xian Hou , Taishu Kayanoki , Michael Kuss , Stefan Larsson , Luca Latronico , Tiffany Lewis , Jian Li , Ioannis Liodakis , Francesco Longo , Francesco Loparco , Benoit Lott , Michael Lovellette , Pasquale Lubrano , Grzegorz Madejski , Simone Maldera , Alberto Manfreda , Guillem Marti-Devesa , Mario Nicola Mazziotta , Isabella Mereu , Peter Michelson , Nestor Mirabal , Warit Mitthumsiri , Tsunefumi Mizuno , Maria Elena Monzani , Aldo Morselli , Igor Moskalenko , Michela Negro , Roopesh Ojha , Monica Orienti , Elena Orlando , Jonathan F. Ormes , Zhiyuan Pei , Harold A. Pena-Herazo , Massimo Persic , Melissa Pesce-Rollins , Vahe Petrosian , Roberta Pillera , Helen Poon , Troy Porter , Giacomo Principe , Silvia Raino , Riccardo Rando , Bindu Rani , Massimiliano Razzano , Soebur Razzaque , Anita Reimer , Olaf Reimer , Jeff Scargle , Lorenzo Scotton , Davide Serini , Carmelo Sgro , Eric J. Siskind , Gloria Spandre , Paolo Spinelli , Dan Suson , Hiro Tajima , Diego F. Torres , Janeth Valverde , Hend Yassin , Gabrijela Zaharijas

A qualitative and quantitative comparison of the recent GSI measurements of the nuclide yields from 208Pb and 238U at 1 GeV/nucleon and 197Au at 800 MeV/nucleon interactions with protons with the codes LAHET (with both ISABEL and Bertini…

The broadband spectral energy distribution (SED) of Active Galactic Nuclei (AGN) is investigated for a well-selected sample composed of $23$ Seyfert 1 galaxies observed simultaneously in the optical/UV and X-ray bands with the Neil Gehrels…

High Energy Astrophysical Phenomena · Physics 2019-06-12 Huaqing Cheng , Weimin Yuan , He-Yang Liu , A. A. Breeveld , Chichuan Jin , Bifang Liu

We propose a new criterium for saturation of the density of partons both in nucleons and nuclei. It is applicable to any multiple scattering model which would be used to compute the number of strings exchanged in $ep$ and $eA$ collisions.…

High Energy Physics - Phenomenology · Physics 2009-10-31 N. Armesto , C. A. Salgado

We analyse 77 \textit{Fermi} sources and their potential low-energy counterparts previously proposed in the literature. These sources were classified as active galactic nuclei, mainly blazars, based on optical spectroscopy. The main goals…

High Energy Astrophysical Phenomena · Physics 2025-09-03 Alberto Ulgiati , Paolo Padovani , Paolo Giommi , Simona Paiano , Ciro Pinto

We combine near-to-mid-IR Spitzer data with shorter wavelength observations (optical to X-rays) to get insights on the properties of a sample of luminous, obscured Active Galactic Nuclei (AGN). We aim at modeling their broad-band Spectral…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 F. Pozzi , C. Vignali , A. Comastri , E. Bellocchi , J. Fritz , C. Gruppioni , M. Mignoli , R. Maiolino , L. Pozzetti , M. Brusa , F. Fiore , G. Zamorani

We use high-resolution UV-to-optical imaging from the Hubble Space Telescope (HST) to construct spatially resolved spectral energy distributions (SEDs) for seven nearby ($z<0.07$) hard (14--195$\,$keV) X-ray-selected broad-line active…

Parity-violating elastic electron-nucleon scattering at low momentum transfer allows one to access the nucleon's weak charge, the vector coupling of the $Z$-boson to the nucleon. In the Standard Model and at tree level, the weak charge of…

Nuclear Theory · Physics 2016-11-23 Mikhail Gorchtein , Hubert Spiesberger

I present the first public releases (v3.4 and v3.5) of the USINE code for cosmic-ray propagation in the Galaxy (https://lpsc.in2p3.fr/usine). It contains several semi-analytical propagation models previously used in the literature…

Instrumentation and Methods for Astrophysics · Physics 2019-11-28 D. Maurin

We study the Spectral Energy Distributions, SEDs, (from FUV to MIR bands) of the first sizeable sample of 34 low-luminosity radio galaxies at high redshifts, selected in the COSMOS field. To model the SEDs we use two different…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Ranieri D. Baldi , Marco Chiaberge , Alessandro Capetti , Javier Rodriguez-Zaurin , Susana Deustua , William B. Sparks

The Large Hadron Collider forward (LHCf) experiment is designed to use the LHC to verify the hadronic-interaction models used in cosmic-ray physics. Forward baryon production is one of the crucial points to understand the development of…

Searches for Physics beyond the Standard Model have entered an exciting new phase: the complete HERA data samples obtained until the end of operations in the Summer of 2007 are now available for analysis. ZEUS and H1 have each collected…

High Energy Physics - Experiment · Physics 2008-12-31 Stefan Gruenendahl

We perform an initial study of DUNE's sensitivity to enhanced neutrino polarizability within models of light scalar mediators. We identify two possible signatures of polarizability due to neutrino scattering on electrons and due to coherent…

High Energy Physics - Phenomenology · Physics 2025-08-26 Sam Carey , Pedro Machado , Gil Paz , Alexey A. Petrov , Alexandre Sousa , Michele Tammaro , Jure Zupan

In this article, we study the interactions of stable, hadronizing new states, arising in certain extensions of the Standard Model. A simple model, originally intended for stable gluino hadrons, is developed to describe the nuclear…

High Energy Physics - Experiment · Physics 2009-11-10 Aafke Christine Kraan

Hadronic emission from parsec size radio lobes in active galactic nuclei (AGN) is discussed. The lobes are composed of shocked jet plasmaand expected to be filled with high energy particles. By using the Monte Carlo simulation, we calculate…

High Energy Astrophysical Phenomena · Physics 2010-06-18 Motoki Kino , Katsuaki Asano

The radio galaxy IC310 located in the Perseus Cluster is one of the brightest objects in the radio and X-ray bands, and one of the closest active galactic nuclei observed in very-high energies. In GeV - TeV $\gamma$-rays, IC310 was detected…

High Energy Astrophysical Phenomena · Physics 2017-02-08 N. Fraija , A. Marinelli , A. Galvan-Gamez , E. Aguilar-Ruiz

Our ultimate goal is the construction of a model for interactions of two nuclei in the energy range between several tens of GeV up to several TeV per nucleon in the centre-of-mass system. Such nuclear collisions are very complex, being…

High Energy Physics - Phenomenology · Physics 2007-05-23 H. J. Drescher , M. Hladik , S. Ostapchenko , K. Werner

We investigate the use of proton-nucleus elastic scattering experiments using secondary beams of 6He and 8He to determine the physical structure of these nuclei. The sensitivity of these experiments to nuclear structure is examined by using…

Nuclear Theory · Physics 2009-11-06 Stephen P. Weppner , Charlotte Elster , Ofir Garcia

After almost five decades of study of parity violation in hadronic systems, the determination of the seven weak meson-nucleon couplings is still incomplete. Whereas parity violation in nuclear systems is complicated by the intricacies of…

Nuclear Experiment · Physics 2009-11-13 Willem T. H. van Oers