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15 papers · 1 filter
On the acceleration of Ultra-High-Energy Cosmic Rays
Federico Fraschetti
Ultra High Energy Cosmic Rays (UHECRs) hit the Earth's atmosphere with energies exceeding eV. This is the same energy as carried by a tennis ball moving at 100 km/h, but…
Variations of the solar granulation motions with height using the GOLF/SoHO experiment
S. Lefebvre, R. A. Garcia, S. J. Jimenez-Reyes +2
Below 1 mHz, the power spectrum of helioseismic velocity measurements is dominated by the spectrum of convective motions (granulation and supergranulation) making it difficult to d…
Orbital X-Ray Variability of the Microquasar LS 5039
V. Bosch-Ramon, J. M. Paredes, M. Ribo +3
The properties of the orbit and the donor star in the high mass X-ray binary microquasar LS 5039 indicate that accretion processes should mainly occur via a radiatively driven wind…
Further evidence for the presence of a neutron star in 4U 2206+54. INTEGRAL and VLA observations
P. Blay, M. Ribo, I. Negueruela +5
The majority of High Mass X-ray Binaries (HMXBs) behave as X-ray pulsars, revealing that they contain a magnetised neutron star. Among the four HMXBs not showing pulsations, and th…
Spallation dominated propagation of Heavy Cosmic Rays and the Local Interstellar Medium (LISM)
C. Combet, D. Maurin, J. Donnelly +2
Measurements of ultra heavy nuclei at GeV/n energies in the galactic cosmic radiation address the question of the sources (nucleosynthetic s- and r-processes). As such, the determi…
A microquasar shot out from its birth place
I. F. Mirabel, I. Rodrigues, Q. Z. Liu
We show that the microquasar LSI+61303 is running away from its birth place in a young complex of massive stars. The supernova explosion that formed the compact object shot out the…