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14 papers · 2 filters
On an extragalactic origin of the dominant part of the hadronic cosmic rays
R. Plaga
The possibility that the major part of all extrasolar hadronic cosmic rays with energies above 10 MeV/n is of extragalactic origin is discussed. Recent observational results on the…
AGAPEROS: Searches for microlensing in the LMC with the Pixel Method. I. Data treatment and pixel light curves production
A. -L. Melchior
Recent surveys monitoring millions of light curves of resolved stars in the LMC have discovered several microlensing events. Unresolved stars could however significantly contribute…
Photon Dispersion in a Supernova Core
A. Kopf, G. Raffelt
While the photon forward-scattering amplitude on free magnetic dipoles (e.g. free neutrons) vanishes, the nucleon magnetic moments still contribute significantly to the photon disp…
An extragalactic ``flux trapping'' origin of the dominant part of hadronic cosmic rays?
R. Plaga
An extragalactic origin of the dominant part of all extrasolar hadronic cosmic rays above about 10 MeV/nucleon has long been considered unlikely due to energy considerations. In or…
Supernova Neutrino Opacity from Nucleon-Nucleon Bremsstrahlung and Related Processes
Steen Hannestad, Georg Raffelt
Elastic scattering on nucleons, νN -> N ν, is the dominant supernova (SN) opacity source for μand τneutrinos. The dominant energy- and number-changing processes were thought to be…
Very high energy gamma rays from Markarian 501
R. J. Protheroe, C. L. Bhat, P. Fleury +3
During remarkable flaring activity in 1997 Markarian 501 was the brightest source in the sky at TeV energies, outshining the Crab Nebula by a factor of up to 10. Periods of flaring…