1. Origin and role of relativistic cosmic particlesA. Araudo, G. Morlino, B. Olmi, Fabio Acero, I. Agudo, Rémi Adam, Rafael Alves Batista, E. Amato, E. O. Angüner, Serguei Vorobiov, 2021, drugi sestavni deli Opis: This white paper briefly summarizes the importance of the study of relativistic cosmic rays, both as a constituent of our Universe, and through their impact on stellar and galactic evolution. The focus is on what can be learned over the coming decade through ground-based gamma-ray observations over the 20 GeV to 300 TeV range. Submitted as input to ASTRONET Science Vision and Infrastructure roadmap on behalf of the CTA consortium. Ključne besede: High Energy Astrophysical Phenomena, cosmic rays, supernova remnants, Cherenkov Telescope Array Observatory Objavljeno v RUNG: 09.01.2025; Ogledov: 334; Prenosov: 8
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2. Probing dark matter and fundamental physics with the Cherenkov Telescope ArrayFabio Iocco, Manuel Meyer, M. Doro, Werner Hofmann, Judit Pérez Romero, Gabrijela Zaharijas, A. Aguirre-Santaella, E. Amato, E. O. Angüner, Christopher Eckner, 2021, drugi sestavni deli Opis: Astrophysical observations provide strong evidence that more than 80% of all matter in the Universe is in the form of dark matter (DM). Two leading candidates of particles beyond the Standard Model that could constitute all or a fraction of the DM content are the so-called Weakly Interacting Massive Particles (WIMPs) and Axion-Like Particles (ALPs). The upcoming Cherenkov Telescope Array, which will observe gamma rays between 20 GeV and 300 TeV with unprecedented sensitivity, will have unique capabilities to search for these DM candidates. A particularly promising target for WIMP searches is the Galactic Center. WIMPs with annihilation cross sections correctly producing the DM relic density will be detectable with CTA, assuming an Einasto-like density profile and WIMP masses between 200 GeV and 10 TeV. Regarding new physics beyond DM, CTA observations will also enable tests of fundamental symmetries of nature such as Lorentz invariance. Ključne besede: dark matter, weakly interacting massive particles, axion-like particles, fundamental physics, Lorentz invariance, Cherenkov Telescope Array Observatory Objavljeno v RUNG: 09.01.2025; Ogledov: 335; Prenosov: 5
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3. Cherenkov Telescope Array potential in the search for Galactic PeVatronsE.O. Angüner, Christopher Eckner, Gašper Kukec Mezek, Samo Stanič, Serguei Vorobiov, Lili Yang, Gabrijela Zaharijas, Danilo Zavrtanik, Marko Zavrtanik, Lukas Zehrer, 2019, objavljeni znanstveni prispevek na konferenci Opis: One of the major scientific objectives of the future Cherenkov Telescope Array (CTA) Observatory is the search for PeVatrons. PeVatrons are cosmic-ray factories able to accelerate nuclei at least up to the knee feature seen in the spectrum of cosmic rays measured near the Earth. CTA will perform a survey of the full Galactic plane at TeV energies and beyond with unprecedented sensitivity. The determination of efficient criteria to identify PeVatron candidates during the survey is essential in order to trigger further dedicated observations. Here, we present results from a study based on simulations to determine these criteria. The outcome of the study is a PeVatron figure of merit, defined as a metric that provides relations between spectral parameters and spectral cutoff energy lower limits. In addition, simulations of the PeVatron candidate HESS J1641−463 and its parental particle spectrum are presented and discussed. Eventually, our work is applied to simulated population of Galactic PeVatrons, with the aim to determine the sensitivity of CTA. Ključne besede: Galactic cosmic rays, very-high-energy gamma rays, Galactic PeVatrons, Cherenkov Telescope Array (CTA) Observatory, Galactic plane survey, H.E.S.S. J1641−463 PeVatron candidate Objavljeno v RUNG: 08.11.2024; Ogledov: 467; Prenosov: 6
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