Inhomogeneity in Cosmic Ray Sources as the Origin of the Electron Spectrum and the PAMELA Anomaly

被引：92

作者：

Shaviv, Nir J. ^{[1
]}

Nakar, Ehud ^{[2
]}

Piran, Tsvi ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel

[2] Tel Aviv Univ, Raymond & Beverly Sackler Sch Phys & Astron, IL-69978 Tel Aviv, Israel

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 11期

关键词：

SUPERNOVA-REMNANTS; POSITRONS; AGE; PROPAGATION; ABUNDANCE; ENERGIES; GALAXY; EARTH;

D O I：

10.1103/PhysRevLett.103.111302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that inhomogeneity of cosmic ray (CR) sources, due to the concentration of supernova remnants (SNRs) towards the galactic spiral arms, can naturally explain the anomalous increase in the positron/electron ratio observed by PAMELA. We consistently recover the observed positron fraction between 1 and 100 GeV using SNRs as the sole source of CRs. The contribution of a few known nearby SNRs dominates the CR electron spectrum above similar to 100 GeV, leading to the relatively flat spectrum observed by Fermi and to the sharp cutoff observed by H.E.S.S.

引用

页数：4

共 27 条

[1] Measurement of the Cosmic Ray e++e- Spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope [J].

Abdo, A. A. ;

Ackermann, M. ;

Ajello, M. ;

Atwood, W. B. ;

Axelsson, M. ;

Baldini, L. ;

Ballet, J. ;

Barbiellini, G. ;

Bastieri, D. ;

Battelino, M. ;

Baughman, B. M. ;

Bechtol, K. ;

Bellazzini, R. ;

Berenji, B. ;

Blandford, R. D. ;

Bloom, E. D. ;

Bogaert, G. ;

Bonamente, E. ;

Borgland, A. W. ;

Bregeon, J. ;

Brez, A. ;

Brigida, M. ;

Bruel, P. ;

Burnett, T. H. ;

Caliandro, G. A. ;

Cameron, R. A. ;

Caraveo, P. A. ;

Carlson, P. ;

Casandjian, J. M. ;

Cecchi, C. ;

Charles, E. ;

Chekhtman, A. ;

Cheung, C. C. ;

Chiang, J. ;

Ciprini, S. ;

Claus, R. ;

Cohen-Tanugi, J. ;

Cominsky, L. R. ;

Conrad, J. ;

Cutini, S. ;

Dermer, C. D. ;

de Angelis, A. ;

de Palma, F. ;

Digel, S. W. ;

Di Bernardo, G. ;

do Couto e Silva, E. ;

Drell, P. S. ;

Dubois, R. ;

Dumora, D. ;

Edmonds, Y. .

PHYSICAL REVIEW LETTERS, 2009, 102 (18)

[2] An anomalous positron abundance in cosmic rays with energies 1.5-100 GeV [J].

Adriani, O. ;

Barbarino, G. C. ;

Bazilevskaya, G. A. ;

Bellotti, R. ;

Boezio, M. ;

Bogomolov, E. A. ;

Bonechi, L. ;

Bongi, M. ;

Bonvicini, V. ;

Bottai, S. ;

Bruno, A. ;

Cafagna, F. ;

Campana, D. ;

Carlson, P. ;

Casolino, M. ;

Castellini, G. ;

De Pascale, M. P. ;

De Rosa, G. ;

De Simone, N. ;

Di Felice, V. ;

Galper, A. M. ;

Grishantseva, L. ;

Hofverberg, P. ;

Koldashov, S. V. ;

Krutkov, S. Y. ;

Kvashnin, A. N. ;

Leonov, A. ;

Malvezzi, V. ;

Marcelli, L. ;

Menn, W. ;

Mikhailov, V. V. ;

Mocchiutti, E. ;

Orsi, S. ;

Osteria, G. ;

Papini, P. ;

Pearce, M. ;

Picozza, P. ;

Ricci, M. ;

Ricciarini, S. B. ;

Simon, M. ;

Sparvoli, R. ;

Spillantini, P. ;

Stozhkov, Y. I. ;

Vacchi, A. ;

Vannuccini, E. ;

Vasilyev, G. ;

Voronov, S. A. ;

Yurkin, Y. T. ;

Zampa, G. ;

Zampa, N. .

NATURE, 2009, 458 (7238) :607-609

[3] New Measurement of the Antiproton-to-Proton Flux Ratio up to 100 GeV in the Cosmic Radiation [J].

Adriani, O. ;

Barbarino, G. C. ;

Bazilevskaya, G. A. ;

Bellotti, R. ;

Boezio, M. ;

Bogomolov, E. A. ;

Bonechi, L. ;

Bongi, M. ;

Bonvicini, V. ;

Bottai, S. ;

Bruno, A. ;

Cafagna, F. ;

Campana, D. ;

Carlson, P. ;

Casolino, M. ;

Castellini, G. ;

De Pascale, M. P. ;

De Rosa, G. ;

Fedele, D. ;

Galper, A. M. ;

Grishantseva, L. ;

Hofverberg, P. ;

Leonov, A. ;

Koldashov, S. V. ;

Krutkov, S. Y. ;

Kvashnin, A. N. ;

Malvezzi, V. ;

Marcelli, L. ;

Menn, W. ;

Mikhailov, V. V. ;

Minori, M. ;

Mocchiutti, E. ;

Nagni, M. ;

Orsi, S. ;

Osteria, G. ;

Papini, P. ;

Pearce, M. ;

Picozza, P. ;

Ricci, M. ;

Ricciarini, S. B. ;

Simon, M. ;

Sparvoli, R. ;

Spillantini, P. ;

Stozhkov, Y. I. ;

Taddei, E. ;

Vacchi, A. ;

Vannuccini, E. ;

Vasilyev, G. ;

Voronov, S. A. ;

Yurkin, Y. T. .

PHYSICAL REVIEW LETTERS, 2009, 102 (05)

[4] ELECTRONS AND POSITRONS IN THE GALACTIC COSMIC-RAYS [J].

ATOYAN, AM ;

AHARONIAN, FA ;

VOLK, HJ .

PHYSICAL REVIEW D, 1995, 52 (06) :3265-3275

[5] New positron spectral features from supersymmetric dark matter: A way to explain the PAMELA data? [J].

Bergstrom, Lars ;

Bringmann, Torsten ;

Edsjo, Joakim .

PHYSICAL REVIEW D, 2008, 78 (10)

[6] PARTICLE-ACCELERATION AT ASTROPHYSICAL SHOCKS - A THEORY OF COSMIC-RAY ORIGIN [J].

BLANDFORD, R ;

EICHLER, D .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1987, 154 (01) :1-75

[7] An excess of cosmic ray electrons at energies of 300-800 GeV [J].

Chang, J. ;

Adams, J. H., Jr. ;

Ahn, H. S. ;

Bashindzhagyan, G. L. ;

Christl, M. ;

Ganel, O. ;

Guzik, T. G. ;

Isbert, J. ;

Kim, K. C. ;

Kuznetsov, E. N. ;

Panasyuk, M. I. ;

Panov, A. D. ;

Schmidt, W. K. H. ;

Seo, E. S. ;

Sokolskaya, N. V. ;

Watts, J. W. ;

Wefel, J. P. ;

Wu, J. ;

Zatsepin, V. I. .

NATURE, 2008, 456 (7220) :362-365

[8] Pulsar-wind origin of cosmic-ray positrons [J].

Chi, X ;

Cheng, KS ;

Young, ECM .

ASTROPHYSICAL JOURNAL, 1996, 459 (02) :L83-L86

[9] Solar modulation of cosmic electrons [J].

Clem, JM ;

Clements, DP ;

Esposito, J ;

Evenson, P ;

Huber, D ;

LHeureux, J ;

Meyer, P ;

Constantin, C .

ASTROPHYSICAL JOURNAL, 1996, 464 (01) :507-515

[10] Galactic secondary positron flux at the Earth [J].

Delahaye, T. ;

Lineros, R. ;

Donato, F. ;

Fornengo, N. ;

Lavalle, J. ;

Salati, P. ;

Taillet, R. .

ASTRONOMY & ASTROPHYSICS, 2009, 501 (03) :821-833

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