Lorentz violation at high energy: Concepts, phenomena, and astrophysical constraints [PDF]
Annals of Physics, 2006 We consider here the possibility of quantum gravity induced violation of Lorentz symmetry (LV). Even if suppressed by the inverse Planck mass such LV can be tested by current experiments and astrophysical observations. We review the effective field theory approach to describing LV, the issue of naturalness, and many phenomena characteristic of LV.
JACOBSON T +2 more
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Proton Acceleration with Relativistic Electromagnetic Shock [PDF]
Advanced ScienceUnderstanding the mechanisms behind the extreme energies of cosmic rays is crucial for unraveling fundamental physical processes in astrophysical environments. This study proposes a novel mechanism for accelerating cosmic‐ray protons. By examining a high‐
Ting Xiao +5 more
doaj +2 more sources
Generalizing the similitude approach for laboratory astrophysics through equivalence symmetries for the example of radiative waves [PDF]
Scientific ReportsFor decades, scaling laws have served as the cornerstone of laboratory astrophysics, enabling quantitative comparisons between astrophysical phenomena and laboratory experiments.
Victor Tranchant +4 more
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GrailQuest: hunting for atoms of space and time hidden in the wrinkle of Space-Time [PDF]
Experimental Astronomy, 2021 AbstractGrailQuest(Gamma Ray Astronomy International Laboratory for QUantum Exploration of Space-Time) is a mission concept based on a constellation (hundreds/thousands) of nano/micro/small-satellites in low (or near) Earth orbits. Each satellite hosts a non-collimated array of scintillator crystals coupled with Silicon Drift Detectors with broad ...
Burderi L. +32 more
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Acceleration of Relativistic Particles in Counterpropagating Circularly Polarized Alfvén Waves
The Astrophysical Journal, 2023 Counterpropagating Alfvén waves are ubiquitously observed in many astrophysical environments, such as a star surface and a planetary foreshock. We discuss an efficient particle acceleration mechanism in two counterpropagating circularly polarized Alfvén ...
S. Isayama +3 more
doaj +1 more source
A Precessing Jet Scenario for the Multi-Wavelength Long-Term Modulation of LS I +61°303
Universe, 2021 The high-mass X-ray binary LS I +61°303 is detected across the electromagnetic spectrum from radio until the very high energy γ-ray regime. The emission is not only highly variable on many time scales, but is also periodic at all observed wavelengths ...
Frédéric Jaron
doaj +1 more source
Ultra-High-Energy Astroparticles as Probes for Lorentz Invariance Violation
Universe, 2022 Compelling evidence for Lorentz invariance violation (LIV) would demand a complete revision of modern physics. Therefore, searching for a signal or extending the validity of the invariance is fundamental for building our understanding of the extreme ...
Rodrigo Guedes Lang +2 more
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Searching for Short-Timescale Transients in Gamma-ray Telescope Data
Galaxies, 2023 Astrophysical sources show variability in their emissions over a range of timescales, with transients such as fast radio bursts (FRBs) and magnetar giant flares (MGFs) showing variability on timescales as short as a few milliseconds.
Annanay Jaitly +2 more
doaj +1 more source
The connection between the fastest astrophysical jets and the spin axis of their black hole. [PDF]
Nat AstronFender RP, Motta SE.
europepmc +2 more sources
Fifty Years of Energy Extraction from Rotating Black Hole: Revisiting Magnetic Penrose Process
Universe, 2019 Magnetic Penrose process (MPP) is not only the most exciting and fascinating process mining the rotational energy of black hole but it is also the favored astrophysically viable mechanism for high energy sources and phenomena.
Arman Tursunov, Naresh Dadhich
doaj +1 more source