Aldo Morselli - on behalf of the Fermi LAT collaboration

Aldo Morselli
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Aldo Morselli
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on behalf of the Fermi LAT collaboration
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High Energy Physics - Phenomenology (9)
 
High Energy Astrophysical Phenomena (8)
 
Astrophysics (6)
 
Instrumentation and Methods for Astrophysics (3)
 
High Energy Physics - Experiment (2)
 
Nuclear Experiment (1)
 
Solar and Stellar Astrophysics (1)
 
Cosmology and Nongalactic Astrophysics (1)

Publications Authored By Aldo Morselli

2016Nov
Affiliations: 1on behalf of the e-ASTROGAM Collaboration, 2on behalf of the e-ASTROGAM Collaboration, 3on behalf of the e-ASTROGAM Collaboration, 4on behalf of the e-ASTROGAM Collaboration, 5on behalf of the e-ASTROGAM Collaboration, 6on behalf of the e-ASTROGAM Collaboration, 7on behalf of the e-ASTROGAM Collaboration, 8on behalf of the e-ASTROGAM Collaboration, 9on behalf of the e-ASTROGAM Collaboration, 10on behalf of the e-ASTROGAM Collaboration, 11on behalf of the e-ASTROGAM Collaboration, 12on behalf of the e-ASTROGAM Collaboration, 13on behalf of the e-ASTROGAM Collaboration, 14on behalf of the e-ASTROGAM Collaboration, 15on behalf of the e-ASTROGAM Collaboration, 16on behalf of the e-ASTROGAM Collaboration, 17on behalf of the e-ASTROGAM Collaboration, 18on behalf of the e-ASTROGAM Collaboration, 19on behalf of the e-ASTROGAM Collaboration, 20on behalf of the e-ASTROGAM Collaboration, 21on behalf of the e-ASTROGAM Collaboration, 22on behalf of the e-ASTROGAM Collaboration, 23on behalf of the e-ASTROGAM Collaboration, 24on behalf of the e-ASTROGAM Collaboration, 25on behalf of the e-ASTROGAM Collaboration, 26on behalf of the e-ASTROGAM Collaboration, 27on behalf of the e-ASTROGAM Collaboration, 28on behalf of the e-ASTROGAM Collaboration, 29on behalf of the e-ASTROGAM Collaboration, 30on behalf of the e-ASTROGAM Collaboration, 31on behalf of the e-ASTROGAM Collaboration, 32on behalf of the e-ASTROGAM Collaboration, 33on behalf of the e-ASTROGAM Collaboration, 34on behalf of the e-ASTROGAM Collaboration, 35on behalf of the e-ASTROGAM Collaboration, 36on behalf of the e-ASTROGAM Collaboration, 37on behalf of the e-ASTROGAM Collaboration, 38on behalf of the e-ASTROGAM Collaboration, 39on behalf of the e-ASTROGAM Collaboration, 40on behalf of the e-ASTROGAM Collaboration, 41on behalf of the e-ASTROGAM Collaboration, 42on behalf of the e-ASTROGAM Collaboration, 43on behalf of the e-ASTROGAM Collaboration, 44on behalf of the e-ASTROGAM Collaboration, 45on behalf of the e-ASTROGAM Collaboration, 46on behalf of the e-ASTROGAM Collaboration, 47on behalf of the e-ASTROGAM Collaboration, 48on behalf of the e-ASTROGAM Collaboration, 49on behalf of the e-ASTROGAM Collaboration, 50on behalf of the e-ASTROGAM Collaboration, 51on behalf of the e-ASTROGAM Collaboration, 52on behalf of the e-ASTROGAM Collaboration, 53on behalf of the e-ASTROGAM Collaboration, 54on behalf of the e-ASTROGAM Collaboration, 55on behalf of the e-ASTROGAM Collaboration, 56on behalf of the e-ASTROGAM Collaboration, 57on behalf of the e-ASTROGAM Collaboration, 58on behalf of the e-ASTROGAM Collaboration, 59on behalf of the e-ASTROGAM Collaboration, 60on behalf of the e-ASTROGAM Collaboration, 61on behalf of the e-ASTROGAM Collaboration, 62on behalf of the e-ASTROGAM Collaboration, 63on behalf of the e-ASTROGAM Collaboration, 64on behalf of the e-ASTROGAM Collaboration, 65on behalf of the e-ASTROGAM Collaboration, 66on behalf of the e-ASTROGAM Collaboration, 67on behalf of the e-ASTROGAM Collaboration, 68on behalf of the e-ASTROGAM Collaboration, 69on behalf of the e-ASTROGAM Collaboration, 70on behalf of the e-ASTROGAM Collaboration

e-ASTROGAM (`enhanced ASTROGAM') is a breakthrough Observatory mission dedicated to the study of the non-thermal Universe in the photon energy range from 0.3 MeV to 3 GeV. The mission is based on an advanced space-proven detector technology, with unprecedented sensitivity, angular and energy resolution, combined with polarimetric capability. Read More

The isotropic gamma-ray background arises from the contribution of unresolved sources, including members of confirmed source classes and proposed gamma-ray emitters such as the radiation induced by dark matter annihilation and decay. Clues about the properties of the contributing sources are imprinted in the anisotropy characteristics of the gamma-ray background. We use 81 months of Pass 7 Reprocessed data from the Fermi Large Area Telescope to perform a measurement of the anisotropy angular power spectrum of the gamma-ray background. Read More

2015Nov
Authors: Fabio Acero, Markus Ackermann, Marco Ajello, Luca Baldini, Jean Ballet, Guido Barbiellini, Denis Bastieri, Ronaldo Bellazzini, E. Bissaldi, Roger Blandford, E. D. Bloom, Raffaella Bonino, Eugenio Bottacini, J. Bregeon, Philippe Bruel, Rolf Buehler, S. Buson, G. A. Caliandro, Rob A. Cameron, R Caputo, Micaela Caragiulo, Patrizia A. Caraveo, Jean Marc Casandjian, Elisabetta Cavazzuti, Claudia Cecchi, A. Chekhtman, J. Chiang, G. Chiaro, Stefano Ciprini, R. Claus, J. M. Cohen, Johann Cohen-Tanugi, L. R. Cominsky, B. Condon, Jan Conrad, S. Cutini, F. D'Ammando, A. Angelis, F. Palma, Rachele Desiante, S. W. Digel, L. Venere, Persis S Drell, Alex Drlica-Wagner, C. Favuzzi, E. C. Ferrara, Anna Franckowiak, Prof. Yasushi Fukazawa, Prof. Stefan Funk, P. Fusco, Fabio Gargano, Dario Gasparrini, Nicola Giglietto, Paolo Giommi, Francesco Giordano, Marcello Giroletti, Tom Glanzman, Gary Godfrey, G A. Gomez-Vargas, I. A. Grenier, M. -H. Grondin, L. Guillemot, Sylvain Guiriec, M Gustafsson, D. Hadasch, A. K. Harding, M. Hayashida, Elizabeth Hays, J. W. Hewitt, A. B. Hill, Deirdre Horan, X. Hou, Giulia Iafrate, Tobias Jogler, G. J'ohannesson, Anthony S. Johnson, T. Kamae, Hideaki Katagiri, Prof. Jun Kataoka, Junichiro Katsuta, Matthew Kerr, J. Knodlseder, Prof. Dale Kocevski, M. Kuss, Helene Laffon, J. Lande, S. Larsson, Luca Latronico, Marianne Lemoine-Goumard, J. Li, L. Li, Francesco Longo, Francesco Loparco, Michael N. Lovellette, Pasquale Lubrano, J. Magill, S. Maldera, Martino Marelli, Michael Mayer, M. N. Mazziotta, Peter F. Michelson, Warit Mitthumsiri, Tsunefumi Mizuno, Alexander A. Moiseev, Maria Elena Monzani, E. Moretti, Aldo Morselli, Igor V. Moskalenko, Prof. Simona Murgia, Prof. Rodrigo Nemmen, Eric Nuss, Takashi Ohsugi, Nicola Omodei, Monica Orienti, Elena Orlando, Jonathan F. Ormes, David Paneque, J. S. Perkins, Melissa Pesce-Rollins, Prof. Vahe' Petrosian, Frederic Piron, Giovanna Pivato, Troy Porter, S. Rain`o, Riccardo Rando, Massimiliano Razzano, Soebur Razzaque, Anita Reimer, Prof. Olaf Reimer, Matthieu Renaud, Thierry Reposeur, Mr. Romain Rousseau, P. M. Parkinson, J. Schmid, A. Schulz, C. Sgr`o, Eric J Siskind, Francesca Spada, Gloria Spandre, Paolo Spinelli, Andrew W. Strong, Daniel Suson, Hiro Tajima, Hiromitsu Takahashi, T. Tanaka, Jana B. Thayer, D. J. Thompson, L. Tibaldo, Omar Tibolla, Prof. Diego F. Torres, Gino Tosti, Eleonora Troja, Yasunobu Uchiyama, G. Vianello, B. Wells, Kent Wood, M. Wood, Manal Yassine, Stephan Zimmer

To uniformly determine the properties of supernova remnants (SNRs) at high energies, we have developed the first systematic survey at energies from 1 to 100 GeV using data from the Fermi Large Area Telescope. Based on the spatial overlap of sources detected at GeV energies with SNRs known from radio surveys, we classify 30 sources as likely GeV SNRs. We also report 14 marginal associations and 245 flux upper limits. Read More

Dark matter decay or annihilation may produce monochromatic signals in the gamma-ray energy range. In this work we argue that there are strong theoretical motivations for studying these signals in the framework of gravitino dark matter decay and we perform a search for gamma-ray spectral lines from 100\,MeV to 10\,GeV with Fermi-LAT data. In contrast to previous line searches at higher energies, the sensitivity of the present search is dominated by systematic uncertainties across most of the energy range considered. Read More

High-energy phenomena in the cosmos, and in particular processes leading to the emission of gamma- rays in the energy range 10 MeV - 100 GeV, play a very special role in the understanding of our Universe. This energy range is indeed associated with non-thermal phenomena and challenging particle acceleration processes. The technology involved in detecting gamma-rays is challenging and drives our ability to develop improved instruments for a large variety of applications. Read More

We derive constraints on parameters of generic dark matter candidates by comparing theoretical predictions with the gamma-ray emission observed by the Fermi-LAT from the region around the Galactic Center. Our analysis is conservative since it simply requires that the expected dark matter signal does not exceed the observed emission. The constraints obtained in the likely case that the collapse of baryons to the Galactic Center is accompanied by the contraction of the dark matter are strong. Read More

Our understanding of the Universe today includes overwhelming observational evidence for the existence of an elusive form of matter that is generally referred to as dark. Although many theories have been developed to describe its nature, very little is actually known about its properties. Since its launch in 2008, the Large Area Telescope, onboard the Fermi Gamma-ray Space Telescope, has detected by far the greatest number ever of gamma rays, in the 20MeV 300GeV energy range and electrons + positrons in the 7 GeV- 1 TeV range. Read More

The Galactic Center region is expected to host the largest density of Dark Matter (DM) particles within the Milky Way. Then a relatively large gamma-ray signal would be expected from the possible DM particles annihilation (or decay). We are searching for the DM gamma-ray signal from the Galactic Center, which is also rich in bright discrete gamma-ray sources. Read More

The detection of gamma-rays, antiprotons and positrons due to pair annihilation of dark matter particles in the Milky Way halo is a viable indirect technique to search for signatures of supersymmetric dark matter where the major challenge is the discrimination of the signal from the background generated by standard production mechanisms. The new PAMELA antiproton data are consistent with the standard secondary production and this allows us to constrain exotic contribution to the spectrum due to neutralino annihilations. In particular, we show that in the framework of minimal supergravity (mSUGRA), in a clumpy halo scenario (with clumpiness factor > 10) and for large values of tan(beta)> 55, almost all the parameter space allowed by WMAP is excluded. Read More

We study the prospects for detecting gamma-rays from point sources of Dark Matter annihilation with the space satellite GLAST. We simulate the instrument response to the gamma-ray spectrum arising from the annihilation of common Dark Matter candidates, and derive full-sky sensitivity maps for the {\it detection} of point sources and for the {\it identification} of the Dark Matter (as opposed to astrophysical) origin of the gamma-ray emission. These maps represent a powerful tool to assess the detectability of point sources, i. Read More

The EGRET telescope has identified a gamma-ray source at the Galactic center. We point out here that the spectral features of this source are compatible with the gamma-ray flux induced by pair annihilations of dark matter weakly interacting massive particles (WIMPs). We show that the discrimination between this interpretation and other viable explanations will be possible with GLAST, the next major gamma-ray telescope in space, on the basis of both the spectral and the angular signature of the WIMP-induced component. Read More

The detection of exotic cosmic rays due to pair annihilation of dark matter particles in the Milky Way halo is a viable techniques to search for supersymmetric dark matter candidates. The study of the spectrum of gamma-rays, antiprotons and positrons offers good possibilities to perform this search in a significant portion of the Minimal Supersymmetric Standard Model parameter space. In particular the EGRET team have seen a convincing signal for a strong excess of emission from the Galactic center that has no simple explanation with standard processes. Read More

Two of the most compelling issues facing astrophysics and cosmology today are to understand the nature of the dark matter that pervades the universe and to understand the apparent absence of cosmological antimatter. For both issues, sensitive measurements of cosmic-ray antiprotons and positrons, in a wide energy range, are crucial. Many different mechanisms can contribute to antiprotons and positrons production, ranging from conventional reactions up to exotic processes like neutralino annihilation. Read More

The energy domain between 10 MeV and hundreds of GeV is an essential one for the multifrequency study of extreme astrophysical sources. The understanding of spectra of detected gamma rays is necessary for developing models for acceleration, emission, absorption and propagation of very high energy particles at their sources and in space. After the end of EGRET on board the Compton Gamma Ray Observatory this energy region is not covered by any other experiment, at least up to 50 GeV where ground Cerenkov telescopes are beginning to take data. Read More