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| Author(s): |
Davi Bessa de Sousa
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Carlos. |
| Institution: | Universidade de São Paulo (USP). Instituto de Física de São Carlos (IFSC/BT) |
| Defense date: | 2024-12-11 |
| Examining board members: |
Aion da Escossia Melo Viana;
Ulisses Barres de Almeida;
Rodrigo Nemmen da Silva
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| Advisor: | Aion da Escossia Melo Viana |
| Abstract | |
The Galactic Center (GC) is a region rich in complex astrophysical phenomena, featuring diverse structures of molecular gas, intense star formation, and high-energy activities. This dissertation focuses on the Central Molecular Zone (CMZ), the dense accumulation of molecular gas surrounding the GC, to study its on gamma-ray emission profile. Multi-wavelength observations were analyzed to understand the interplay of magnetic fields, gravitational forces, and particle interactions in this dynamic region. We implemented different structure models to characterize the distribution of molecular gas in the CMZ, such as simplified elliptical approximations (1), maps derived from magnetohydrodynamics simulations (2), and an analytical model derived from a combination of observational data and theoretical approximations (3). These models served as the basis for simulating gamma-ray emission, revealing how cosmic rays interact with the complex molecular environment to generate high-energy radiation. We employ an analytical model (4) for the cosmic-ray (CR) propagation and gamma-ray emission. We compared the obtained results with real observation data from the H.E.S.S. collaboration, demonstrating that properly modelling the shape of the CMZ has a significant impact on the hypothesis for the CR accelerators responsible for the observed emission. (AU) | |
| FAPESP's process: | 22/04119-1 - Non-thermal gamma-ray emission in the Galactic Center region |
| Grantee: | Davi Bessa de Sousa |
| Support Opportunities: | Scholarships in Brazil - Master |