Title
Electron and positron fluxes in primary cosmic rays measured with the alpha magnetic spectrometer on the international space station
Date Issued
18 September 2014
Access level
open access
Resource Type
journal article
Author(s)
Aguilar M.
Aisa D.
Alvino A.
Ambrosi G.
Andeen K.
Arruda L.
Attig N.
Azzarello P.
Bachlechner A.
Barao F.
Barrau A.
Barrin L.
Bartoloni A.
Basara L.
Battarbee M.
Battiston R.
Becker U.
Behlmann M.
Beischer B.
Berdugo J.
Bertucci B.
Bigongiari G.
Bindi V.
Bizzaglia S.
Bizzarri M.
Boella G.
De Boer W.
Bollweg K.
Bonnivard V.
Borgia B.
Borsini S.
Boschini M.J.
Bourquin M.
Burger J.
Cadoux F.
Cai X.D.
Capell M.
Caroff S.
Casaus J.
Cascioli V.
Castellini G.
Cernuda I.
Cervelli F.
Chae M.J.
Chang Y.H.
Chen A.I.
Chen H.
Cheng G.M.
Chen H.S.
Cheng L.
Chikanian A.
Chou H.Y.
Choumilov E.
Choutko V.
Chung C.H.
Clark C.
Clavero R.
Coignet G.
Consolandi C.
Contin A.
Corti C.
Coste B.
Cui Z.
Dai M.
Delgado C.
Della Torre S.
Demirköz M.B.
Derome L.
Di Falco S.
Di Masso L.
Dimiccoli F.
Díaz C.
Von Doetinchem P.
Du W.J.
Duranti M.
D'Urso D.
Eline A.
Eppling F.J.
Eronen T.
Fan Y.Y.
Farnesini L.
Feng J.
Fiandrini E.
Fiasson A.
Finch E.
Fisher P.
Galaktionov Y.
Gallucci G.
García B.
García-López R.
Gast H.
Gebauer I.
Gervasi M.
Ghelfi A.
Gillard W.
Giovacchini F.
Goglov P.
Gong J.
Goy C.
RWTH Aachen University
Publisher(s)
American Physical Society
Abstract
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 at ∼30GeV but the fluxes are significantly different in their magnitude and energy dependence. Between 20 and 200 GeV the positron spectral index is significantly harder than the electron spectral index. The determination of the differing behavior of the spectral indices versus energy is a new observation and provides important information on the origins of cosmic-ray electrons and positrons.
Volume
113
Issue
12
Language
English
Scopus EID
2-s2.0-84907235912
Source
Physical Review Letters
ISSN of the container
00319007
Sources of information:
Directorio de Producción Científica
Scopus