LMC N132D: A mature supernova remnant with a power-law gamma-ray spectrum extending beyond 8 TeV
| Title: | LMC N132D: A mature supernova remnant with a power-law gamma-ray spectrum extending beyond 8 TeV |
|---|---|
| Authors: | H Abdalla; F Aharonian; F Ait Benkhali; EO Anguner; C Arcaro; C Armand; T Armstrong; H Ashkar; M Backes; V Baghmanyan; V Barbosa Martins; A Barnacka; M Barnard; R Batzofin; Y Becherini; D Berge; K Bernloehr; B Bi; M Boettcher; C Boisson; J Bolmont; M de Bony de Lavergne; M Breuhaus; R Brose; F Brun; T Bulik; T Bylund; F Cangemi; S Caroff; S Casanova; J Catalano; P Chambery; T Chand; A Chen; G Cotter; M Curylo; J Damascene Mbarubucyeye; ID Davids; J Davies; J Devin; A Djannati-Atai; A Dmytriiev; A Donath; V Doroshenko; L Dreyer; L Du Plessis; C Duffy; K Egberts; S Einecke; J-P Ernenwein; S Fegan; K Feijen; A Fiasson; G Fichet de Clairfontaine; G Fontaine; F Lott; M Fussling; S Funk; S Gabici; YA Gallant; G Giavitto; L Giunti; D Glawion; JF Glicenstein; M-H Grondin; S Hattingh; M Haupt; G Hermann; JA Hinton; W Hofmann; C Hoischen; TL Holch; M Holler; M Hoerbe; D Horns; Zhiqiu Huang; D Huber; M Jamrozy; F Jankowsky; V Joshi; I Jung-Richardt; E Kasai; K Katarzynski; U Katz; D Khangulyan; B Khelifi; S Klepser; W Kluzniak; Nu Komin; R Konno; K Kosack; D Kostunin; M Kreter; G Kukec Mezek; A Kundu; G Lamanna; S Le Stum; A Lemiere; M Lemoine-Goumard; J-P Lenain; F Leuschner; C Levy; T Lohse; A Luashvili; I Lypova; J Mackey; J Majumdar; D Malyshev; V Marandon; P Marchegiani; A Marcowith; A Mares; G Marti-Devesa; R Marx; G Maurin; PJ Meintjes; M Meyer; A Mitchell; R Moderski; L Mohrmann; A Montanari; C Moore; E Moulin; J Muller; T Murach; K Nakashima; M de Naurois; A Nayerhoda; H Ndiyavala; J Niemiec; A Priyana Noel; P O'Brien; L Oberholzer; H Odaka; S Ohm; L Olivera-Nieto; E de Ona Wilhelmi; M Ostrowski; S Panny; M Panter; RD Parsons; G Peron; S Pita; V Poireau; DA Prokhorov; H Prokoph; G Puehlhofer; M Punch; A Quirrenbach; P Reichherzer; A Reimer; O Reimer; Q Remy; M Renaud; B Reville; F Rieger; C Romoli; G Rowell; B Rudak; H Rueda Ricarte; E Ruiz-Velasco; V Sahakian; S Sailer; H Salzmann; DA Sanchez; A Santangelo; M Sasaki; J Schaefer; F Schuessler; HM Schutte; U Schwanke; M Senniappan; AS Seyffert; JNS Shapopi; K Shiningayamwe; R Simoni; A Sinha; H Sol; A Specovius; S Spencer; M Spir-Jacob; L Stawarz; R Steenkamp; C Stegmann; S Steinmassl; C Steppa; L Sun; T Takahashi; T Tanaka; T Tavernier; AM Taylor; R Terrier; JHE Thiersen; C Thorpe-Morgan; M Tluczykont; L Tomankova; M Tsirou; N Tsuji; R Tuffs; Y Uchiyama; DJ van der Walt; C van Eldik; C van Rensburg; B van Soelen; G Vasileiadis; J Veh; C Venter; P Vincent; J Vink; HJ Voelk; SJ Wagner; J Watson; F Werner; R White; A Wierzcholska; Yu Wun Wong; H Yassin; A Yusafzai; M Zacharias; R Zanin; D Zargaryan; AA Zdziarski; A Zech; SJ Zhu; A Zmija; S Zouari; N Zywucka |
| Publication Year: | 2021 |
| Collection: | University of Leicester: Figshare |
| Subject Terms: | Science & Technology; Physical Sciences; Astronomy & Astrophysics; gamma rays; general; cosmic rays; ISM; supernova remnants; LARGE-MAGELLANIC-CLOUD; LARGE-AREA TELESCOPE; X-RAY; MOLECULAR CLOUDS; MAXIMUM ENERGY; GALACTIC PLANE; COSMIC-RAYS; HESS OBSERVATIONS; EMITTING EJECTA; CRAB-NEBULA |
| Description: | Context. Supernova remnants (SNRs) are commonly thought to be the dominant sources of Galactic cosmic rays up to the knee of the cosmic-ray spectrum at a few PeV. Imaging Atmospheric Cherenkov Telescopes have revealed young SNRs as very-high-energy (VHE, >100 GeV) gamma-ray sources, but for only a few SNRs the hadronic cosmic-ray origin of their gamma-ray emission is indisputably established. In all these cases, the gamma-ray spectra exhibit a spectral cutoff at energies much below 100 TeV and thus do not reach the PeVatron regime. Aims. The aim of this work was to achieve a firm detection for the oxygen-rich SNR LMC N132D in the VHE gamma-ray domain with an extended set of data, and to clarify the spectral characteristics and the localization of the gamma-ray emission from this exceptionally powerful gamma-ray-emitting SNR. Methods. We analyzed 252 h of High Energy Stereoscopic System (H.E.S.S.) observations towards SNR N132D that were accumulated between December 2004 and March 2016 during a deep survey of the Large Magellanic Cloud, adding 104 h of observations to the previously published data set to ensure a > 5σ detection. To broaden the gamma-ray spectral coverage required for modeling the spectral energy distribution, an analysis of Fermi-LAT Pass 8 data was also included. Results. We unambiguously detect N132D at VHE with a significance of 5.7σ. We report the results of a detailed analysis of its spectrum and localization based on the extended H.E.S.S. data set. The joint analysis of the extended H.E.S.S and Fermi-LAT data results in a spectral energy distribution in the energy range from 1.7 GeV to 14.8 TeV, which suggests a high luminosity of N132D at GeV and TeV energies. We set a lower limit on a gamma-ray cutoff energy of 8 TeV with a confidence level of 95%. The new gamma-ray spectrum as well as multiwavelength observations of N132D when compared to physical models suggests a hadronic origin of the VHE gamma-ray emission. Conclusions. SNR N132D is a VHE gamma-ray source that shows a spectrum ... |
| Document Type: | article in journal/newspaper |
| Language: | unknown |
| Relation: | 2381/18623342.v1 |
| Availability: | https://figshare.com/articles/journal_contribution/LMC_N132D_A_mature_supernova_remnant_with_a_power-law_gamma-ray_spectrum_extending_beyond_8_TeV/18623342 |
| Rights: | All Rights Reserved |
| Accession Number: | edsbas.39850F15 |
| Database: | BASE |