| Title: |
Study of the hadronic PeVatron candidate SNR G106+3.2.7: Large Zenith Angle observations with LST-1 and MAGIC ; Étude du candidat PeVatron hadronique SNR G106.3-2: observations à grand angle zénithal avec LST-1 et MAGIC |
| Authors: |
Carrasco, Marie-Sophie |
| Contributors: |
Centre de Physique des Particules de Marseille (CPPM); Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS); Aix-Marseile Université; Franca Cassol; Heide Costantini; CTAO-LST Project; MAGIC Collaboration |
| Source: |
https://theses.hal.science/tel-05568570 ; Physique des Hautes Energies - Expérience [hep-ex]. Aix-Marseile Université, 2025. Français. ⟨NNT : ⟩. |
| Publisher Information: |
CCSD |
| Publication Year: |
2025 |
| Collection: |
Aix-Marseille Université: HAL |
| Subject Terms: |
large zenith angle; 3D analysis; background modeling; extended sources; G106.3+2.7; MAGIC; LST-1; imaging atmospheric Cherenkov telescopes; UHE gamma rays; Galactic PeVatrons; cosmic rays; rayons gamma UHE; analyse 3D; modélisation du fond; grands angles zénithaux; sources étendues; télescopes à imagerie Tcherenkov; PeVatrons galactiques; rayons cosmiques; [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]; [PHYS.ASTR.GA]Physics [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA]; [PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE] |
| Description: |
Supernova remnants (SNRs) are historically considered the primary accelerators of Galactic cosmic rays up to the PeV scale, yet direct evidence of hadronic acceleration at these energies remains elusive. The composite SNR G106.3+2.7 stands out as a strong candidate due to its detection of ultra-high-energy (UHE) gamma-ray emission above 100 TeV, complex morphology, and spatial association with a molecular cloud. Multi-wavelength studies suggest a mixed scenario, with both leptonic and hadronic components contributing to the observed emission.This thesis presents a detailed analysis of 42.6 hours of mono-telescope observations with the Large-Sized Telescope prototype (LST-1), carried out at large zenith angles to enhance sensitivity above 10 TeV. These data are part of an ongoing multi-year observation campaign coordinated with MAGIC, aiming to probe the 1-50 TeV energy range with high angular resolution. Additionnaly, a joint strategy has been implemented for the spectral analysis, combining LST-1 and MAGIC data from previous publication with different zenith angle regimes to ensure spectral consistency.To enable this analysis, several methods and tools were developed or optimized: a dedicated data selection pipeline, a reconstruction scheme based on high-density Monte Carlo simulations combined with a random forest interpolation method, and a 3D background modeling package (BAccMod) tailored to our needs for extended sources at large zenith angles.We perform a morphological and spectral analysis, including energy-binned skymaps, 1D spectral fits in MAGIC and LHAASO-defined regions of interest, and a full 3D spatial–spectral likelihood fit over the field of view. The best-fit model reveals two independent components, an extended soft-spectrum emission from the SNR head and a compact hard-spectrum source at the tail,supporting a hadronic origin for the UHE emission. This work establishes a robust methodology for characterizing complex gamma-ray sources and contributes to the search for Galactic PeVatrons with the ... |
| Document Type: |
doctoral or postdoctoral thesis |
| Language: |
French |
| Availability: |
https://theses.hal.science/tel-05568570; https://theses.hal.science/tel-05568570v1/document; https://theses.hal.science/tel-05568570v1/file/151333_CARRASCO_2025_archivage.pdf |
| Rights: |
https://creativecommons.org/licenses/by-nc-nd/4.0/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.1293F15F |
| Database: |
BASE |