Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Odysseas Kosmas"'
Publikováno v:
Particles, Vol 7, Iss 3, Pp 792-804 (2024)
In the last few decades, galactic stellar black hole X-ray binary systems (BHXRBs) have aroused intense observational and theoretical research efforts specifically focusing on their multi-messenger emissions (radio waves, X-rays, γ-rays, neutrinos,
Externí odkaz:
https://doaj.org/article/1a9fe67cec0e4f6781c3fee4ae892edc
Publikováno v:
Particles, Vol 7, Iss 3, Pp 818-833 (2024)
A black hole’s spin effects on the jet emissions of high-energy neutrinos and γ-rays from black hole X-ray binary systems (BHXRBs) are investigated. The BHXRBs consist of a stellar black hole, a companion (donor) star, a BH accretion disk, a BH co
Externí odkaz:
https://doaj.org/article/d6e4d51ca60941d1bad51db913df1183
Publikováno v:
Universe, Vol 9, Iss 12, p 517 (2023)
Astrophysical plasma ejections (jets) are formed and powered by black holes that accrete material from their companion star in binary systems. Black hole X-ray binary systems constitute potential powerful galactic and extragalactic neutrino and gamma
Externí odkaz:
https://doaj.org/article/3b5d447639ca405eb2b2a12cb37966cd
Publikováno v:
Universe, Vol 9, Iss 7, p 312 (2023)
X-ray binary systems (XRBs) exhibit similar dynamics and multimessenger emission mechanisms to active galactic nuclei (AGNs) with the benefit of shorter time scaling. Those systems produce rich spectral energy distributions (SEDs) ranging from the ra
Externí odkaz:
https://doaj.org/article/e898c3ce8d2f4f32b5e9410f1b1eaa72
Autor:
Odysseas Kosmas
Publikováno v:
Applied Mechanics, Vol 2, Iss 3, Pp 431-441 (2021)
In previous works we developed a methodology of deriving variational integrators to provide numerical solutions of systems having oscillatory behavior. These schemes use exponential functions to approximate the intermediate configurations and velocit
Externí odkaz:
https://doaj.org/article/478f4609a4684a89a3b5f49cae13cfb9
Publikováno v:
Symmetry, Vol 14, Iss 3, p 485 (2022)
In this work, we deal with collimated outflows of magnetized astrophysical plasma known as astrophysical jets, which have been observed to emerge from a wide variety of astrophysical compact objects. The latter systems can be considered as either hyd
Externí odkaz:
https://doaj.org/article/a5a0df60fd0444d9a111821ca7d6a97e
Publikováno v:
Galaxies, Vol 9, Iss 3, p 67 (2021)
Recently, microquasar jets have aroused the interest of many researchers focusing on the astrophysical plasma outflows and various jet ejections. In this work, we concentrate on the investigation of electromagnetic radiation and particle emissions fr
Externí odkaz:
https://doaj.org/article/f1af8d264e7f40118a56b57d6e5fa84a
Publikováno v:
Applied Sciences, Vol 11, Iss 17, p 7837 (2021)
We investigated the derivation of numerical methods for solving partial differential equations, focusing on those that preserve physical properties of Hamiltonian systems. The formulation of these properties via symplectic forms gives rise to multisy
Externí odkaz:
https://doaj.org/article/9920e9cd9a4e4c8f8d37ae97be2da003
Publikováno v:
Mathematics, Vol 9, Iss 14, p 1689 (2021)
The deformation of a solid due to changing boundary conditions is described by a deformation gradient in Euclidean space. If the deformation process is reversible (conservative), the work done by the changing boundary conditions is stored as potentia
Externí odkaz:
https://doaj.org/article/bd38100d775b46cfb333d5019003f8ef
Publikováno v:
Frontiers in Physics, Vol 7 (2019)
Neutrino-nucleus reactions cross sections, obtained for neutrino energies in the range εν ≤ 100–120 MeV (low- and intermediate-energy range), which refer to promising neutrino detection targets of current terrestrial neutrino experiments, are p
Externí odkaz:
https://doaj.org/article/48e60d86434b4563a820ab4864d0b83b