Sensitivity of present and future gamma-ray telescopes to dark matter self-annihilation signals in the Galactic Center

• Ano de defesa: 2022
• Autor(a) principal: Fortes, Guilherme Nishina
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: eng
• Instituição de defesa: Biblioteca Digitais de Teses e Dissertações da USP
• Palavras-chave em Português: ϒ-ray; Centro galático; Cherenkov; Curvas de sensibilidade; Dark matter; Galactic center; Matéria escura; Raio ϒ Sensitivity curves
• Link de acesso: https://www.teses.usp.br/teses/disponiveis/76/76132/tde-30082022-085624/

Current estimates set the majority of the composition of the matter content of the Universe as gravitationally and weakly interacting as well as non-baryonic. This Dark Matter is expected to form halos around galaxies and have played an important role in their development and structure. Despite such importance, this source of gravitational anomalies has not been observed and research is ongoing. The annihilation of Dark Matter yields photons, used in indirect detection methods and commonly employ ϒ-rays due to their properties and are a robust choice for a long distance messenger. We adopt an Einasto density profile and calculate the J-factors, ϒ ray flux and plot sensitivity curves for current (such as the H.E.S.S) and planned (such as CTA) Cherenkov observatories, comparing their performances on observing the Milky Way center, a proposed locus of great Dark Matter concentration so as to verify their effectiveness. The curves were obtained utilising an ON-OFF statistical likelihood technique with a Poisson distribution. The prospects for next generation instruments are to improve current limits by at least an order of magnitude.