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

被引：800

作者：

Abdo, A. A. ^{[1
,2
]}

Ackermann, M. ^{[3
,4
]}

Ajello, M. ^{[3
,4
]}

Atwood, W. B. ^{[5
,6
]}

Axelsson, M. ^{[7
,8
]}

Baldini, L. ^{[9
]}

Ballet, J. ^{[10
]}

Barbiellini, G. ^{[11
,12
]}

Bastieri, D. ^{[13
,14
]}

Battelino, M. ^{[7
,15
]}

Baughman, B. M. ^{[16
]}

Bechtol, K. ^{[3
,4
]}

Bellazzini, R. ^{[9
]}

Berenji, B. ^{[3
,4
]}

Blandford, R. D. ^{[3
,4
]}

Bloom, E. D. ^{[3
,4
]}

Bogaert, G. ^{[17
]}

Bonamente, E. ^{[18
,19
]}

Borgland, A. W. ^{[3
,4
]}

Bregeon, J. ^{[9
]}

Brez, A. ^{[9
]}

Brigida, M. ^{[20
,21
,23
]}

Bruel, P. ^{[17
]}

Burnett, T. H. ^{[22
]}

Caliandro, G. A. ^{[20
,21
,23
]}

Cameron, R. A. ^{[3
,4
]}

Caraveo, P. A. ^{[24
]}

Carlson, P. ^{[7
,15
]}

Casandjian, J. M. ^{[10
]}

Cecchi, C. ^{[18
,19
]}

Charles, E. ^{[3
,4
]}

Chekhtman, A. ^{[2
,25
]}

Cheung, C. C. ^{[26
]}

Chiang, J. ^{[3
,4
]}

Ciprini, S. ^{[18
,19
]}

Claus, R. ^{[3
,4
]}

Cohen-Tanugi, J. ^{[27
]}

Cominsky, L. R. ^{[28
]}

Conrad, J. ^{[7
,15
,29
]}

Cutini, S. ^{[30
]}

Dermer, C. D. ^{[2
]}

de Angelis, A. ^{[31
,32
]}

de Palma, F. ^{[20
,21
,23
]}

Digel, S. W. ^{[3
,4
]}

Di Bernardo, G. ^{[9
]}

do Couto e Silva, E. ^{[3
,4
]}

Drell, P. S. ^{[3
,4
]}

Dubois, R. ^{[3
,4
]}

Dumora, D. ^{[33
,34
]}

Edmonds, Y. ^{[3
,4
]}

机构：

[1] CNR, Ottawa, ON, Canada

[2] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA

[3] Stanford Univ, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, Stanford, CA 94305 USA

[4] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA

[5] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Dept Phys, Santa Cruz, CA 95064 USA

[6] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA

[7] Oskar Klein Ctr Cosmo Particle Phys, SE-10691 Stockholm, Sweden

[8] Stockholm Univ, Dept Astron, SE-10691 Stockholm, Sweden

[9] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy

[10] Univ Paris Diderot, CEA Saclay, Lab AIM, CEA IRFU CNRS,Serv Astrophys, F-91191 Gif Sur Yvette, France

[11] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy

[12] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy

[13] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy

[14] Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy

[15] Royal Inst Technol KTH, Dept Phys, SE-10691 Stockholm, Sweden

[16] Ohio State Univ, Dept Phys, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA

[17] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France

[18] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy

[19] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy

[20] M Merlin Univ, Dipartimento Fis, I-70126 Bari, Italy

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

[22] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[23] Politecn Bari, I-70126 Bari, Italy

[24] INAF Ist Astrofis Spaziale & Fis Cosm, I-20133 Milan, Italy

[25] George Mason Univ, Fairfax, VA 22030 USA

[26] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[27] Univ Montpellier 2, CNRS, IN2P3, Lab Phys Theor & Astroparticules, Montpellier, France

[28] Sonoma State Univ, Dept Phys & Astron, Rohnert Pk, CA 94928 USA

[29] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden

[30] ASI, Sci Data Ctr, I-00044 Frascati, Roma, Italy

[31] Univ Udine, Dipartimento Fis, I-33100 Udine, Italy

[32] Ist Nazl Fis Nucl, Sez Trieste, Grp Collegato Udine, I-33100 Udine, Italy

[33] Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, UMR 5797, F-33175 Gradignan, France

[34] Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, UMR 5797, F-33175 Gradignan, France

[35] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan

[36] Univ Maryland, College Pk, MD 20742 USA

[37] Univ Alabama, Huntsville, AL 35899 USA

[38] Waseda Univ, Shinjuku Ku, Tokyo 1698050, Japan

[39] RIKEN, Cosm Radiat Lab, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan

[40] Tokyo Inst Technol, Dept Phys, Meguro, Tokyo 1528551, Japan

[41] CNRS UPS, Ctr Etud Spatiale Rayonnements, F-31028 Toulouse 4, France

[42] NASA, Goddard Space Flight Ctr, CRESST, Greenbelt, MD 20771 USA

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

[44] Univ Denver, Dept Phys & Astron, Denver, CO 80208 USA

[45] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany

[46] JAXA, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan

[47] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[48] CSIC, IEEC, Inst Ciencies Espai, Barcelona 08193, Spain

[49] NASA, Ames Res Ctr, Div Space Sci, Moffett Field, CA 94035 USA

[50] Purdue Univ Calumet, Dept Chem & Phys, Hammond, IN 46323 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 18期

基金：

瑞典研究理事会;

关键词：

GAMMA-RAYS; ELECTRONS; ENERGIES;

D O I：

10.1103/PhysRevLett.102.181101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Designed as a high-sensitivity gamma-ray observatory, the Fermi Large Area Telescope is also an electron detector with a large acceptance exceeding 2 m(2) sr at 300 GeV. Building on the gamma-ray analysis, we have developed an efficient electron detection strategy which provides sufficient background rejection for measurement of the steeply falling electron spectrum up to 1 TeV. Our high precision data show that the electron spectrum falls with energy as E-3.0 and does not exhibit prominent spectral features. Interpretations in terms of a conventional diffusive model as well as a potential local extra component are briefly discussed.

引用

页数：6

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