PAMELA Measurements of Cosmic-Ray Proton and Helium Spectra

被引：718

作者：

Adriani, O. ^{[2
,3
]}

Barbarino, G. C. ^{[4
,5
]}

Bazilevskaya, G. A. ^{[6
]}

Bellotti, R. ^{[7
,8
]}

Boezio, M. ^{[9
]}

Bogomolov, E. A. ^{[10
]}

Bonechi, L. ^{[2
,3
]}

Bongi, M. ^{[3
]}

Bonvicini, V. ^{[9
]}

Borisov, S. ^{[1
,11
,12
]}

Bottai, S. ^{[3
]}

Bruno, A. ^{[7
,8
]}

Cafagna, F. ^{[8
]}

Campana, D. ^{[5
]}

Carbone, R. ^{[5
,11
]}

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

Casolino, M. ^{[1
]}

Castellini, G. ^{[15
]}

Consiglio, L. ^{[5
]}

De Pascale, M. P. ^{[1
,11
]}

De Santis, C. ^{[1
,11
]}

De Simone, N. ^{[1
,11
]}

Di Felice, V. ^{[1
]}

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

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

Grishantseva, L. ^{[12
]}

Jerse, G. ^{[9
,16
]}

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

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

Krutkov, S. Y. ^{[10
]}

Kvashnin, A. N. ^{[6
]}

Leonov, A. ^{[12
]}

Malakhov, V. ^{[12
]}

Malvezzi, V. ^{[1
]}

Marcelli, L. ^{[1
]}

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

Menn, W. ^{[17
]}

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

Mocchiutti, E. ^{[9
]}

Monaco, A. ^{[7
,8
]}

Mori, N. ^{[2
,3
]}

Nikonov, N. ^{[1
,10
,11
]}

Osteria, G. ^{[5
]}

Palma, F. ^{[1
,11
]}

Papini, P. ^{[3
]}

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

Picozza, P. ^{[1
,11
]}

Pizzolotto, C. ^{[9
]}

Ricci, M. ^{[18
]}

Ricciarini, S. B. ^{[3
]}

机构：

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

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

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

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

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

[6] Lebedev Phys Inst, RU-119991 Moscow, Russia

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

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

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

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

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

[12] Moscow Engn & Phys Inst, RU-11540 Moscow, Russia

[13] Kungliga Tekniska Hogskolan, Dept Phys, SE-10691 Stockholm, Sweden

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

[15] Ist Fis Applicata Nello Carrara, 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

来源：

SCIENCE | 2011年 / 332卷 / 6025期

基金：

俄罗斯基础研究基金会; 瑞典研究理事会;

关键词：

SOLAR MODULATION; ACCELERATION; PROPAGATION; GALAXY; MATTER; WAVES; BESS;

D O I：

10.1126/science.1199172

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Protons and helium nuclei are the most abundant components of the cosmic radiation. Precise measurements of their fluxes are needed to understand the acceleration and subsequent propagation of cosmic rays in our Galaxy. We report precision measurements of the proton and helium spectra in the rigidity range 1 gigavolt to 1.2 teravolts performed by the satellite-borne experiment PAMELA (payload for antimatter matter exploration and light-nuclei astrophysics). We find that the spectral shapes of these two species are different and cannot be described well by a single power law. These data challenge the current paradigm of cosmic-ray acceleration in supernova remnants followed by diffusive propagation in the Galaxy. More complex processes of acceleration and propagation of cosmic rays are required to explain the spectral structures observed in our data.

引用

页码：69 / 72

页数：4

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