Characterization of the Gamma-ray Emission from the Kepler Supernova Remnant with Fermi-LAT
| hal.structure.identifier | Astrophysique Interprétation Modélisation [AIM (UMR_7158 / UMR_E_9005 / UM_112)] | |
| dc.contributor.author | ACERO, F. | |
| hal.structure.identifier | Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG] | |
| dc.contributor.author | LEMOINE-GOUMARD, M. | |
| hal.structure.identifier | Astrophysique Interprétation Modélisation [AIM (UMR_7158 / UMR_E_9005 / UM_112)] | |
| dc.contributor.author | BALLET, J. | |
| dc.date.accessioned | 2023-11-20T16:51:03Z | |
| dc.date.available | 2023-11-20T16:51:03Z | |
| dc.date.issued | 2022 | |
| dc.identifier.issn | 0004-6361 | |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/185079 | |
| dc.description.abstractEn | The Kepler supernova remnant (SNR) had been the only historic SNR that lacked a detection at GeV and TeV energies, which probe particle acceleration. A recent analysis of Fermi-LAT data reported a likely GeV γ-ray candidate in the direction of the SNR. Using approximately the same data set but with an optimized analysis configuration, we confirm the γ-ray candidate to a solid >6σ detection and report a spectral index of 2.14 ± 0.12stat ± 0.15syst for an energy flux above 100 MeV of (3.1 ± 0.6stat ± 0.3syst) × 10−12 erg cm−2 s−1. The γ-ray excess is not significantly extended and is fully compatible with the radio, infrared, and X-ray spatial distribution of the SNR. We successfully characterized this multiwavelength emission with a model in which accelerated particles interact with the dense circumstellar material in the northwest portion of the SNR and radiate GeV γ rays through π° decay. The X-ray synchrotron and inverse-Compton emission mostly stem from the fast shocks in the southern regions with a magnetic field B ~ 100 μG or higher. Depending on the exact magnetic field amplitude, the TeV γ-ray emission could arise from either the south region (inverse-Compton dominated) or the interaction region (π° decay dominated). | |
| dc.description.sponsorship | Rayons Cosmiques au PeV | |
| dc.language.iso | en | |
| dc.publisher | EDP Sciences | |
| dc.subject.en | shock waves | |
| dc.subject.en | acceleration of particles | |
| dc.subject.en | supernovae: individual: Kepler | |
| dc.subject.en | cosmic rays | |
| dc.subject.en | supernova remnants | |
| dc.subject.en | shock waves | |
| dc.title.en | Characterization of the Gamma-ray Emission from the Kepler Supernova Remnant with Fermi-LAT | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1051/0004-6361/202142200 | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Phénomènes cosmiques de haute energie [astro-ph.HE] | |
| dc.identifier.arxiv | 2201.05567 | |
| bordeaux.journal | Astronomy and Astrophysics - A&A | |
| bordeaux.page | A129 | |
| bordeaux.volume | 660 | |
| bordeaux.hal.laboratories | Centre d'Études Nucléaires de Bordeaux Gradignan (CENBG) | * |
| bordeaux.institution | Université de Bordeaux | |
| bordeaux.institution | CNRS | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-03655723 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-03655723v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&rft.date=2022&rft.volume=660&rft.spage=A129&rft.epage=A129&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=ACERO,%20F.&LEMOINE-GOUMARD,%20M.&BALLET,%20J.&rft.genre=article |
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