Raffaella Bonino
(Istituto Nazionale di Fisica Nucleare)
15/05/2009, 14:30
We present a measurement of the inclusive cosmic-ray electron and positron (CRE) spectrum between 7 GeV and 2 TeV performed with almost seven years of data collected with the Fermi Large Area Telescope. The spectrum above 100 GeV can explore the properties of local CRE sources.
Because of the long live time and the very large acceptance of the LAT, our data are the largest CRE sample...
Dr
Henning Gast
(I. Physikalisches Institut B, RWTH Aachen)
15/05/2009, 14:55
Precision measurements by the Alpha Magnetic Spectrometer on the International Space Station of the primary cosmic-ray electron flux in the range 0.5 to 700 GeV and the positron flux in the range 0.5 to 500 GeV are presented. The electron flux and the positron flux each require a description beyond a single power-law spectrum. Both the electron flux and the positron flux change their behavior...
Pierre SALATI
(LAPTh and Université Savoie Mont Blanc)
15/05/2009, 15:15
A hardening of the proton and helium fluxes is observed above a few hundreds of GeV/nuc. The actual distribution of the local sources of primary cosmic rays has been suggested as a potential solution to this puzzling behavior. Some authors even claim that a single source is responsible for the proton and helium anomalies. But how probable are such explanations ? To answer that question, I will...
Dr
Weiwei Xu
(Massachusetts Institute of Technology)
15/05/2009, 15:40
A precision measurement by AMS of the antiproton flux and the antiproton-to-proton flux ratio in primary cosmic rays in the absolute rigidity range from 1 to 450 GV is presented based on 3.49 × 105 antiproton events and 2.42 × 109 proton events. The antiproton-to-proton flux ratio reaches a maximum at ∼20 GV and is rigidity independent above 60.3 GV
