Characterization of the GeV emission from the Kepler supernova remnant
| hal.structure.identifier | Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)] | |
| dc.contributor.author | ACERO, Fabio | |
| hal.structure.identifier | Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG] | |
| dc.contributor.author | LEMOINE-GOUMARD, Marianne | |
| hal.structure.identifier | Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)] | |
| dc.contributor.author | BALLET, Jean | |
| dc.date.accessioned | 2022-04-19T12:05:47Z | |
| dc.date.available | 2022-04-19T12:05:47Z | |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/136700 | |
| dc.description.abstractEn | The Kepler supernova remnant (SNR) is the only historic supernova remnant lacking a detection at GeV and TeV energies which probe particle acceleration. A recent analysis of Fermi-LAT data reported a likely GeV gamma-ray candidate in the direction of the SNR. Using approximately the same dataset but with an optimized analysis configuration, we confirm the gamma-ray candidate to a solid $>6\sigma$ detection and report a spectral index of $2.14 \pm 0.12_{\rm stat} \pm 0.15_{\rm syst}$ for an energy flux above 100 MeV of $(3.1 \pm 0.6_{\rm stat} \pm 0.3_{\rm syst}) \times 10^{-12}$ erg~cm$^{-2}$~s$^{-1}$. The gamma-ray excess is not significantly extended and is fully compatible with the radio, infrared or X-ray spatial distribution of the SNR. We successfully characterized this multi-wavelength emission with a model in which accelerated particles interact with the dense circumstellar material in the North-West portion of the SNR and radiate GeV gamma-rays through $\pi^{o}$ decay. The X-ray synchrotron and inverse-Compton (IC) emission mostly stem from the fast shocks in the southern regions with a magnetic field B$\sim$100 $\mu$G or higher. Depending on the exact magnetic field amplitude, the TeV emission could arise from either the South region (IC dominated) or the interaction region ($\pi^{o}$ decay dominated). | |
| dc.language.iso | en | |
| dc.subject.en | synchrotron | |
| dc.subject.en | TeV | |
| dc.subject.en | magnetic field | |
| dc.subject.en | supernova | |
| dc.subject.en | gamma ray | |
| dc.subject.en | radio wave | |
| dc.subject.en | GeV | |
| dc.subject.en | X-ray: spatial distribution | |
| dc.subject.en | particle: acceleration | |
| dc.subject.en | vertex: primary | |
| dc.subject.en | energy: flux | |
| dc.subject.en | power spectrum | |
| dc.subject.en | infrared | |
| dc.subject.en | GLAST | |
| dc.subject.en | solids | |
| dc.title.en | Characterization of the GeV emission from the Kepler supernova remnant | |
| dc.type | Document de travail - Pré-publication | |
| dc.subject.hal | Physique [physics]/Astrophysique [astro-ph] | |
| dc.identifier.arxiv | 2201.05567 | |
| bordeaux.hal.laboratories | Centre d'Études Nucléaires de Bordeaux Gradignan (CENBG) | * |
| bordeaux.institution | Université de Bordeaux | |
| bordeaux.institution | CNRS | |
| hal.identifier | hal-03547046 | |
| hal.version | 1 | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-03547046v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.au=ACERO,%20Fabio&LEMOINE-GOUMARD,%20Marianne&BALLET,%20Jean&rft.genre=preprint |
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