Investigating γ-ray halos around three HAWC bright sources in Fermi-LAT data
| dc.contributor.author | Mauro, Mattia Di | |
| dc.contributor.author | Manconi, Silvia | |
| dc.contributor.author | Negro, Michela | |
| dc.contributor.author | Donato, Fiorenza | |
| dc.date.accessioned | 2021-01-27T17:19:47Z | |
| dc.date.available | 2021-01-27T17:19:47Z | |
| dc.description.abstract | Numerous extended sources around Galactic pulsars have shown significant γ-ray emission from GeV to TeV energies, revealing hundreds of TeV energy electrons scattering off of the underlying photon fields through inverse Compton scattering (ICS). HAWC TeV gamma-ray observations of few-degree extended emission around the pulsars Geminga and Monogem, and LAT GeV emission around Geminga, suggest that systems older than 10-100 kyr have multi-TeV e± propagating beyond the SNR-PWN system into the interstellar medium. Following the discovery of few γ-ray sources by HAWC at energies E>100 TeV, we investigate the presence of an extended γ-ray emission in Fermi-LAT data around the three brightest sources detected by HAWC up to 100 TeV. We find an extended emission of θ₆₈=1.00⁺⁰·⁰⁵₋₀.₀₇ deg around eHWC J1825-134 and θ68=0.71±0.10 deg eHWC J1907+063. The analysis with ICS templates on Fermi-LAT data point to diffusion coefficient values which are significantly lower than the average Galactic one. When studied along with HAWC data, the γ-ray Fermi-LAT data provide invaluable insight into the very high-energy electron and positron parent populations. | en_US |
| dc.description.sponsorship | The work of FD and partially of SM has been supported by the ”Departments of Excellence 2018 - 2022” Grant awarded by the Italian Ministry of Education, University and Research (MIUR) (L. 232/2016). FD acknowledges financial contribution from the agreement ASI-INAF n.2017-14-H.0. MDM acknowledges support from the Fellini Fellowship for Innovation at INFN, funded by the European Unions Horizon 2020 research programm under the Marie Sklodowska-Curie Cofund Action, grant agreement no. 754496 The Fermi LAT Collaboration acknowledges generous ongoing support from a number of agencies and institutes that have supported both the development and the operation of the LAT as well as scientific data analysis. These include the National Aeronautics and Space Administration and the Department of Energy in the United States,the Commissariat `a l’Energie Atomique and the Centre National de la Recherche Scientifique / Institut National de Physique Nucl´eaire et de Physique des Particules in France, the Agenzia Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), High Energy Accelerator Research Organization (KEK) and Japan Aerospace Exploration Agency (JAXA) in Japan, and the K. A. Wallenberg Foundation, the Swedish Research Council and the Swedish National Space Board in Sweden. Additional support for science analysis during the operations phase is gratefully acknowledged from the Istituto Nazionale di Astrofisica in Italy and the Centre National d’Etudes Spatiales in France. This work performed in part under DOE Contract DE-AC02-76SF00515. | en_US |
| dc.description.uri | https://arxiv.org/abs/2012.05932 | en_US |
| dc.format.extent | 19 pages | en_US |
| dc.genre | journal articles preprints | en_US |
| dc.identifier | doi:10.13016/m2tvzi-xtmt | |
| dc.identifier.citation | Mattia Di Mauro, Silvia Manconi, Michela Negro and Fiorenza Donato, Investigating γ-ray halos around three HAWC bright sources in Fermi-LAT data, https://arxiv.org/pdf/2012.05932.pdf | en_US |
| dc.identifier.uri | http://hdl.handle.net/11603/20629 | |
| dc.language.iso | en_US | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Center for Space Sciences and Technology | |
| dc.relation.ispartof | UMBC Faculty Collection | |
| dc.relation.ispartof | UMBC Physics Department | |
| dc.rights | This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author. | |
| dc.title | Investigating γ-ray halos around three HAWC bright sources in Fermi-LAT data | en_US |
| dc.type | Text | en_US |