Sharp increasing of positron to electron fluxes ratio below 2 GV measured by the PAMELA

International Conference on Particle Physics and Astrophysics

物理学;天文学

Mikhailov, V.V.^1 ; Adriani, O.^7 ; Barbarino, G.^2 ; Bazilevskaya, G.A.^3 ; Bellotti, R.^4 ; Boezio, M.^5 ; Bogomolov, E.A.^6 ; Bongi, M.^7 ; Bonvicini, V.^5 ; Bottai, S.^7 ; Bruno, A.^4 ; Cafagna, F.S.^4 ; Campana, D.^2 ; Carlson, P.^8 ; Casolino, M.^9 ; Castellini, G.^10 ; De Donato, C.^9 ; De Santis, C.^9 ; De Simone, N.^9 ; Di Felice, V.^9 ; Galper, A.M.^1 ; Karelin, A.V.^1 ; Koldashov, S.V.^1 ; Koldobsky, S.^1 ; Krutkov, S. Yu.^6 ; Kvashnin, A.N.^3 ; Leonov, A.A.^1,3 ; Malakhov, V.V.^1 ; Marcelli, L.^9 ; Martucci, M.^9,12 ; Mayorov, A.G.^1 ; Menn, W.^11 ; Merge, M.^9,13 ; Mocchiutti, E.^5 ; Monaco, A.^4 ; Mori, N.^10 ; Munini, R.^5 ; Osteria, G.^2 ; Papini, P.^7 ; Palma, F.^9,13 ; Panico, B.^2 ; Pearce, M.^8 ; Picozza, P.^9,13 ; Ricci, M.^12 ; Ricciarini, S.B.^7 ; Simon, M.^11 ; Sparvoli, R.^9,13 ; Spillantini, P.^1 ; Stozhkov, Yu. I.^3 ; Vacchi, A.^5 ; Vannuccini, E.^7 ; Vasiliev, G.I.^6 ; Voronov, S.A.^1 ; Yurkin, Yu. T.^1 ; Zampa, G.^5 ; Zampa, N.^5

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoe highway 31, Moscow

115409, Russia^1

INFN, Sezione di Naples, Physics Department, University of Naples Federico II, Italy^2

Lebedev Physical Institute, Russia^3

INFN, Sezione di Bari, Physics and Department, University of Bari, Italy^4

INFN, Sezione di Trieste, Italy^5

Ioffe Physical Technical Institute, Russia^6

INFN, Sezione di Florence, Physics Department, University of Florence, Italy^7

KTH, Department of Physics, Oskar Klein Centre for Cosmoparticle Physics, Sweden^8

INFN, Sezione di Rome Tor Vergata, Italy

(10) INFN, IFAC, Italy

(11) INFN, Physics Department, Universitaet Siegen, Germany

(12) INFN, Laboratori Nazionali di Frascati, Italy

(13) University of Rome Tor Vergata, Department of Physics, Italy^9

关键词: Earth polar orbit;    Electron flux;    Magnetic spectrometers;    Solar magnetic fields;    Temporal variation;    Wide energy range;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/798/1/012019/pdf
DOI  :  10.1088/1742-6596/798/1/012019

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Magnetic spectrometer PAMELA was launched onboard a satellite Resurs-DK1 into low-Earth polar orbit with altitude 350-600 km to study cosmic ray antiparticle fluxes in a wide energy range from ∼ 100 MeV to hundreds GeV. This paper presents the results of observations of temporal variations of the positron and electron fluxes in the 2006-2015. The ratio of the positron and electron fluxes below 2 GV shows sharp increasing since 2014 due to changing of the polarity of the solar magnetic field.