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Neutrino annihilation in type II supernovae
L'annihilation de neutrinos-antineutrinos en electrons et positrons peut deposer plus de 10 51 ergs au-dessus de la neutrinosphere d'une SN de type II
High Energy Phenomena In The Universe
Highlights of the 44th Rencontre De Moriond on High Energy Phenomena In The Universe which was held in La Thuile, Italy during February 1-8, 2009.
Comments on "Will relativistic heavy-ion colliders destroy our planet?"
Abstract Experiments at the Brookhaven National Laboratory will study collisions between gold nuclei at unprecedented energies. The concern has been voiced that “strangelets” – hypothetical products
CAN THE SOFT X-RAY OPACITY TOWARD HIGH-REDSHIFT SOURCES PROBE THE MISSING BARYONS?
Observations with the Swift satellite of X-ray afterglows of more than a hundred gamma-ray bursts (GRBs) with known redshift reveal ubiquitous soft X-ray absorption. The directly measured optical
Gamma Ray Bursts from Minijets
Striking similarities exist between high energy gamma ray emission from active galactic nuclei (AGN) and gamma ray bursts (GRBs). They suggest that GRBs are generated by inverse Compton scattering
LIFE EXTINCTIONS BY COSMIC RAY JETS
High energy cosmic ray jets from nearby mergers or accretion induced collapse (AIC) of neutron stars (NS) that hit the atmosphere can produce lethal fluxes of atmospheric muons at ground level,
On the optical and X-ray afterglows of gamma ray bursts
We severely criticize the consuetudinary analysis of the afterglows of gamma-ray bursts (GRBs) in the conical-ejection fireball scenarios. We argue that, instead, recent observations imply that the
Dark matter and big bang nucleosynthesis
21 The recently observed Deuterium abundance in a low-metallicity high-redshift hydrogen cloud, which is about ten times larger than that observed in the near in­ terstellar medium, is that expected
The host galaxy and optical light curve of the gamma-ray burst GRB 980703
We present deep HST /STIS and ground-based photometry of the host galaxy of the gamma-ray burst GRB 980703 taken 17, 551, 710, and 716 days after the burst. We find that the host is a blue, slightly
THE DIVERSE BROADBAND LIGHT CURVES OF SWIFT GAMMA-RAY BURSTS REPRODUCED WITH THE CANNONBALL MODEL
Two radiation mechanisms, inverse Compton scattering (ICS) and synchrotron radiation (SR), suffice within the Cannonball (CB) model of long gamma-ray bursts (LGRBs) and X-ray flashes (XRFs) to
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