A5089656101- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Pulsars and Gravitational Waves Research
- Dark Matter and Cosmic Phenomena
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Radioactive Decay and Measurement Techniques
- Solar and Space Plasma Dynamics
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Relativity and Gravitational Theory
- Noncommutative and Quantum Gravity Theories
- Astro and Planetary Science
- Mechanics and Biomechanics Studies
- Particle Detector Development and Performance
Foundation for Research and Technology Hellas
2023
University of Crete
2017-2023
We present the first Bayesian method for tomographic decomposition of plane-of-sky orientation magnetic field with use stellar polarimetry and distance. This standalone inversion presents an important step forward in reconstructing magnetized interstellar medium (ISM) three dimensions within dusty regions. develop a model which polarization signal from ISM is described by thin layers at various distances, working assumption should be satisfied small-angular circular apertures. Our modeling...
A bstract Generic solutions are studied in Einstein-scalar gravity an ansatz that can interpolate between de Sitter and Anti-de regimes. The classification of regular [1, 2] is first extended to the dS regime. This implies, among others, existence cosmic clocks reverse direction without passing through a curvature singularity. We then consider for AdS structure such more general their singularities studied. It shown there no extrema generic potentials. unlike Centaur were exist two bulk...
Context . Ultra-high-energy cosmic rays (UHECRs) are highly energetic charged particles with energies exceeding 10 18 eV. These far greater than those achieved in Earth-bound accelerators, and identifying their sources production mechanism can shed light on many open questions both astrophysics high-energy physics. However, due to the presence of Galactic magnetic field (GMF) they deflected, hence location true source plane sky (PoS) is concealed. The identification UHECR an question,...
Ultrahigh-energy cosmic rays (UHECRs) are charged particles with energies surpassing $10^ $ eV. Their sources remain elusive because they obscured by deflections caused the Galactic magnetic field (GMF). This challenge is further complicated our limited understanding of 3D structure GMF current observations primarily consist quantities that integrated along line sight (LOS). Nevertheless, data from upcoming stellar polarization surveys Gaia parallax expected to yield local measurements....
Context. The observed correlation between the radio and X-ray fluxes in hard state of black-hole binaries (BHXRBs) has been existence for over two decades. It is currently accepted that X-rays BHXRBs come from Comptonization corona emission relativistic jet (Lorentz γ ≫ 1), which a narrow structure few R g = GM/c 2 at its base. corona, however, are separate entities with hardly any communication them, apart fact both fed accreting matter. Aims. also widely accretion flow around black holes...
Black-hole and neutron-star X-ray binaries exhibit compact radio jets, when they are in the so called quiescent, hard, or hard intermediate states. The spectrum these states is flat to slightly inverted. It widely accepted that energy distribution of electrons, rest frame jet, a power law with index p. A power-law electrons jet sufficient explain inverted emitted by from near infrared wavelengths, but it necessary? Contrary what our thinking was decades ago, now we know jets originate hot...
(abridged) Ultra-high energy cosmic rays (UHECRs) are extremely energetic charged particles with energies surpassing $10^{18}$ eV. Their sources remain elusive, obscured by deflections caused the Galactic magnetic field (GMF). This challenge is further complicated our limited understanding of three-dimensional structure GMF, as current GMF observations consist primarily quantities integrated along line-of-sight (LOS). Nevertheless, data from upcoming stellar polarisation surveys Gaia's...
(abridged) Ultra-high energy cosmic rays (UHECRs) are highly energetic charged particles with energies exceeding $10^{18}$ eV. Identifying their sources and production mechanism can provide insight into many open questions in astrophysics high physics. However, the Galactic magnetic field (GMF) deflects UHECRs, uncertainties our current understanding of $3$-dimensional structure GMF does not permit us to accurately determine true arrival direction on plane sky (PoS). This difficulty arises...
The observed correlation between the radio and X-ray fluxes in hard state of black-hole binaries (BHXRBs) has been around for more than two decades. It is currently accepted that X-rays BHXRBs come from Comptonization corona emission relativistic jet (Lorentz $\gamma >> 1$), which a narrow structure few $R_g=GM/c^2$ at its base. corona, however, are separate entities with hardly any communication them, apart fact both fed accreting matter. also widely accretion flow black holes consists an...