Results 11 to 20 of about 829 (204)

A Unified Model of High-Energy Astrophysical phenomena [PDF]

open access: yesInternational Journal of Modern Physics A, 2004
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.
A. DE RÚJULA, De Rújula, Alvaro
core   +4 more sources

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

open access: yesAnnals of Physics, 2005
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.
Ted Jacobson   +7 more
core   +5 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 ...
Burderi L.   +32 more
openaire   +5 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 ...
openaire   +3 more sources

Neutrino treatment in multidimensional astrophysical simulations : a new spectral scheme [PDF]

open access: yes, 2014
Neutrinos play a central role in modern physics and astrophysics. Their extremely weak interaction rate with baryons and other leptons makes their detection on the Earth difficult and challenging.
Perego, Albino
core   +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   +2 more sources

Computational challenges in high-energy astrophysics [PDF]

open access: yes, 2008
Supercomputers and grid networks are the basic instruments to elaborate and test physical models involving complex astrophysical phenomena. In this review some aspects of the field of high-energy astrophysics are illustrated that require large-scale ...
Ferrari, Attilio, Ferrari, A.
core   +1 more source

NEUTRINO TELESCOPES AND HIGH-ENERGY ASTROPHYSICS. [PDF]

open access: yes, 2009
Neutrino astrophysics offers new perspectives on Universe investigation: high-energy neutrinos, produced by the most energetic phenomena in our Galaxy and in the Universe, carry complementary information with respect to photons.
Spurio, M., SPURIO, MAURIZIO
core   +1 more source

TeV gamma-ray emission from accreting binary pulsars [PDF]

open access: yes, 1990
The high-mass X-ray binary SMC X-1 has been observed during the interval 1986-1989 at a threshold γ-ray energy of 0.4 TeV using the University of Durham Mark III air Cerenkov telescope at Narrabri.
Mannings, Vincent, Mannings, V
core  

The Cosmic Stories: Beginning, Evolution and Present Days of the Universe [PDF]

open access: yes, 2012
This work presents three studies of independent astrophysical phenomena which cover a full timeline of the universe from the epoch of inflation to the present day.
Tseliakhovich, Dmitriy
core   +1 more source

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