Cosmic-Ray Electron Flux Measured by the PAMELA Experiment between 1 and 625 GeV

被引：290

作者：

Adriani, O. ^{[1
,2
]}

Barbarino, G. C. ^{[3
,4
]}

Bazilevskaya, G. A. ^{[5
]}

Bellotti, R. ^{[6
,7
]}

Boezio, M. ^{[8
]}

Bogomolov, E. A. ^{[9
]}

Bongi, M. ^{[2
]}

Bonvicini, V. ^{[8
]}

Borisov, S. ^{[10
,11
,12
]}

Bottai, S. ^{[2
]}

Bruno, A. ^{[6
,7
]}

Cafagna, F. ^{[7
]}

Campana, D. ^{[4
]}

Carbone, R. ^{[4
,11
]}

Carlson, P. ^{[13
,14
]}

Casolino, M. ^{[10
]}

Castellini, G. ^{[15
]}

Consiglio, L.

De Pascale, M. P. ^{[10
,11
]}

De Santis, C. ^{[10
]}

De Simone, N. ^{[10
,11
]}

Di Felice, V. ^{[10
]}

Galper, A. M. ^{[12
]}

Gillard, W. ^{[13
,14
]}

Grishantseva, L. ^{[12
]}

Jerse, G. ^{[8
,16
]}

Karelin, A. V. ^{[12
]}

Koldashov, S. V. ^{[12
]}

Krutkov, S. Y. ^{[9
]}

Kvashnin, A. N. ^{[5
]}

Leonov, A. ^{[12
]}

Malakhov, V. ^{[12
]}

Malvezzi, V. ^{[10
]}

Marcelli, L. ^{[10
]}

Mayorov, A. G. ^{[12
]}

Menn, W. ^{[17
]}

Mikhailov, V. V. ^{[12
]}

Mocchiutti, E. ^{[8
]}

Monaco, A. ^{[6
,7
]}

Mori, N. ^{[1
,2
,12
]}

Nikonov, N. ^{[9
,10
,11
]}

Osteria, G. ^{[4
]}

Palma, F. ^{[10
,11
]}

Papini, P. ^{[2
]}

Pearce, M. ^{[13
,14
]}

Picozza, P. ^{[10
,11
]}

Pizzolotto, C. ^{[8
]}

Ricci, M. ^{[18
]}

Ricciarini, S. B. ^{[2
]}

Rossetto, L. ^{[13
,14
]}

机构：

[1] Univ Florence, Dept Phys, I-50019 Florence, Italy

[2] Ist Nazl Fis Nucl, Sez Florence, I-50019 Florence, Italy

[3] Univ Naples Federico 2, Dept Phys, I-80126 Naples, Italy

[4] Ist Nazl Fis Nucl, Sez Naples, I-80126 Naples, Italy

[5] PN Lebedev Phys Inst, RU-119991 Moscow, Russia

[6] Univ Bari, Dept Phys, I-70126 Bari, Italy

[7] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy

[8] Ist Nazl Fis Nucl, Sez Trieste, I-34149 Trieste, Italy

[9] AF Ioffe Phys Tech Inst, RU-194021 St Petersburg, Russia

[10] Ist Nazl Fis Nucl, Sez Rome Tor Vergata, I-00133 Rome, Italy

[11] Univ Roma Tor Vergata, Dept Phys, I-00133 Rome, Italy

[12] Natl Res Nucl Univ MEPHI, RU-115409 Moscow, Russia

[13] AlbaNova Univ Ctr, KTH, Dept Phys, SE-10691 Stockholm, Sweden

[14] AlbaNova Univ Ctr, Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden

[15] IFAC, I-50019 Florence, Italy

[16] Univ Trieste, Dept Phys, I-34147 Trieste, Italy

[17] Univ Siegen, Dept Phys, D-57068 Siegen, Germany

[18] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[19] New Mexico State Univ, Las Cruces, NM 88003 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 20期

基金：

瑞典研究理事会; 俄罗斯基础研究基金会;

关键词：

IMAGING CALORIMETER; ENERGY-SPECTRUM; POSITRONS; EARTH;

D O I：

10.1103/PhysRevLett.106.201101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Precision measurements of the electron component in the cosmic radiation provide important information about the origin and propagation of cosmic rays in the Galaxy. Here we present new results regarding negatively charged electrons between 1 and 625 GeV performed by the satellite-borne experiment PAMELA. This is the first time that cosmic-ray e(-) have been identified above 50 GeV. The electron spectrum can be described with a single power-law energy dependence with spectral index -3.18 +/- 0.05 above the energy region influenced by the solar wind (> 30 GeV). No significant spectral features are observed and the data can be interpreted in terms of conventional diffusive propagation models. However, the data are also consistent with models including new cosmic-ray sources that could explain the rise in the positron fraction.

引用

页数：5

共 32 条

[21] CHARGE COMPOSITION AND ENERGY SPECTRUM OF PRIMARY COSMIC-RAY ELECTRONS [J].

FANSELOW, JL ;

HARTMAN, RC ;

HILDEBRAD, RH ;

MEYER, P .

ASTROPHYSICAL JOURNAL, 1969, 158 (2P1) :771-+

[22] SOLAR MODULATION OF GALACTIC COSMIC RAYS [J].

GLEESON, LJ ;

AXFORD, WI .

ASTROPHYSICAL JOURNAL, 1968, 154 (3P1) :1011-&

[23] Measurements of the absolute energy spectra of cosmic-ray positrons and electrons above 7 GeV [J].

Grimani, C ;

Stephens, SA ;

Cafagna, FS ;

Basini, G ;

Bellotti, R ;

Brunetti, MT ;

Circella, M ;

Codino, A ;

De Marzo, C ;

De Pascale, MP ;

Finetti, N ;

Golden, RL ;

Hof, M ;

Menn, W ;

Mitchell, JW ;

Morselli, A ;

Ormes, JF ;

Papini, P ;

Pfeifer, C ;

Piccardi, S ;

Picozza, P ;

Ricci, M ;

Simon, M ;

Spillantini, P ;

Stochaj, SJ ;

Streitmatter, RE .

ASTRONOMY & ASTROPHYSICS, 2002, 392 (01) :287-294

[24]

KOBAYASHI T, 1999, P 26 INT COSM RAY C, V3, P61

[25] WHERE TO STICK YOUR DATA POINTS - THE TREATMENT OF MEASUREMENTS WITHIN WIDE BINS [J].

LAFFERTY, GD ;

WYATT, TR .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1995, 355 (2-3) :541-547

[26] EMULSION CHAMBER OBSERVATIONS OF PRIMARY COSMIC-RAY ELECTRONS IN THE ENERGY-RANGE 30-1000 GEV [J].

NISHIMURA, J ;

FUJII, M ;

TAIRA, T ;

AIZU, E ;

HIRAIWA, H ;

KOBAYASHI, T ;

NIU, K ;

OHTA, I ;

GOLDEN, RL ;

KOSS, TA ;

LORD, JJ ;

WILKES, RJ .

ASTROPHYSICAL JOURNAL, 1980, 238 (01) :394-409

[27] PAMELA - A payload for antimatter matter exploration and light-nuclei astrophysics [J].

Picozza, P. ;

Galper, A. M. ;

Castellini, G. ;

Adriani, O. ;

Altamura, F. ;

Ambriola, M. ;

Barbarino, G. C. ;

Basili, A. ;

Bazilevskaja, G. A. ;

Bencardino, R. ;

Boezio, M. ;

Bogomolov, E. A. ;

Bonechi, L. ;

Bongi, M. ;

Bongiorno, L. ;

Bonvicini, V. ;

Cafagna, F. ;

Campana, D. ;

Carlson, P. ;

Casolino, M. ;

De Marzo, C. ;

De Pascale, M. P. ;

De Rosa, G. ;

Fedele, D. ;

Hofverberg, P. ;

Koldashov, S. V. ;

Krutkov, S. Yu. ;

Kvashnin, A. N. ;

Lund, J. ;

Lundquist, J. ;

Maksumov, O. ;

Malvezzi, V. ;

Marcelli, L. ;

Menn, W. ;

Mikhailov, V. V. ;

Minori, M. ;

Misin, S. ;

Mocchiutti, E. ;

Morselli, A. ;

Nikonov, N. N. ;

Orsi, S. ;

Osteria, G. ;

Papini, P. ;

Pearce, M. ;

Ricci, M. ;

Ricciarini, S. B. ;

Runtso, M. F. ;

Russo, S. ;

Simon, M. ;

Sparvoli, R. .

ASTROPARTICLE PHYSICS, 2007, 27 (04) :296-315

[28] Dissipation of magnetohydrodynamic waves on energetic particles: Impact on interstellar turbulence and cosmic-ray transport [J].

Ptuskin, Vladimir S. ;

Moskalenko, Igor V. ;

Jones, Frank C. ;

Strong, Andrew W. ;

Zirakashvili, Vladimir N. .

ASTROPHYSICAL JOURNAL, 2006, 642 (02) :902-916

[29] Inhomogeneity in Cosmic Ray Sources as the Origin of the Electron Spectrum and the PAMELA Anomaly [J].

Shaviv, Nir J. ;

Nakar, Ehud ;

Piran, Tsvi .

PHYSICAL REVIEW LETTERS, 2009, 103 (11)

[30]

Shong J.A.D., 1964, PHYS REV LETT, V12, P3

← 1 2 3 4 →