Results 1 to 10 of about 2,607 (64)

A UNIFIED MODEL OF HIGH-ENERGY ASTROPHYSICAL PHENOMENA [PDF]

open access: yesInternational Journal of Modern Physics A, 2005
I outline a unified model of high-energy astrophysics, in which the gamma background radiation, cluster "cooling flows", gamma-ray bursts, X-ray flashes and cosmic-ray electrons and nuclei of all energies — share a common origin. The mechanism underlying these phenomena is the emission of relativistic "cannonballs" by ordinary supernovae, analogous to
A. De Rújula, A. De Rújula
openaire   +6 more sources

The Phenomena of High Energy Astrophysics [PDF]

open access: yesSymposium - International Astronomical Union, 2003
A brief summary of some highlights in the study of high energy astrophysical sources over the past decade is presented. It is argued that the great progress that has been made derives largely from the application of new technology to observation throughout all of the electromagnetic and other spectra and that, on this basis, the next decade should be ...
R. Blandford
openaire   +7 more sources

GrailQuest: hunting for atoms of space and time hidden in the wrinkle of Space-Time [PDF]

open access: yesExperimental 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 ...
Heino Falcke   +35 more
openaire   +8 more sources

High-Energy Multimessenger Transient Astrophysics [PDF]

open access: yesAnnual Review of Nuclear and Particle Science, 2019
The recent discoveries of high-energy cosmic neutrinos and gravitational waves from astrophysical objects have led to a new era of multimessenger astrophysics.
K. Murase, I. Bartos
semanticscholar   +1 more source

Lorentz violation at high energy: Concepts, phenomena, and astrophysical constraints [PDF]

open access: yesAnnals 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
openaire   +5 more sources

Testing Lorentz Symmetry Using High Energy Astrophysics Observations [PDF]

open access: yesSymmetry, 2017
We discuss some of the tests of Lorentz symmetry made possible by astrophysical observations of ultrahigh energy cosmic rays, γ-rays, and neutrinos. These are among the most sensitive tests of Lorentz invariance violation because they are the highest ...
F. Stecker
semanticscholar   +1 more source

High-Energy Transients: Thermonuclear (Type-I) X-Ray Bursts [PDF]

open access: yesProceedings of the International Astronomical Union, 2017
Many distinct classes of high-energy variability have been observed in astrophysical sources, and over a range of time-scales. The widest range, spanning microseconds to decades, is found in accreting, compact, stellar-mass objects, including neutron ...
D. Galloway   +7 more
semanticscholar   +1 more source

7th Conference on High Energy Astrophysics in Southern Africa (HEASA2019)

open access: yes, 2020
HEASA 2019 was the seventh conference in the annual series “High Energy Astrophysics in Southern Africa”. Its goal was to bring together scientists from the southern African region, the African continent, and around the world with an interest in high ...
Michael Backes   +5 more
semanticscholar   +1 more source

HIGH ENERGY APPROACHES TO LOW ENERGY PHENOMENA IN ASTROPHYSICS [PDF]

open access: yesElectromagnetic Interactions in Nuclear and Hadron Physics, 2002
Studies in nuclear astrophysics have long been associated with long runs at small accelerators, measuring ever-decreasing cross sections as one approached (but rarely reached) the energy of reactions in stars. But in recent years pioneering studies have shown that studies at high-energy accelerators can often yield the same information, and in some ...
openaire   +3 more sources

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