Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV

被引：302

作者：

Ackermann, M. ^{[1
,2
]}

Ajello, M. ^{[1
,2
]}

Atwood, W. B. ^{[3
,4
]}

Baldini, L. ^{[5
]}

Ballet, J. ^{[6
]}

Barbiellini, G. ^{[7
,8
]}

Bastieri, D. ^{[9
,10
]}

Baughman, B. M. ^{[11
]}

Bechtol, K. ^{[1
,2
]}

Bellardi, F. ^{[5
]}

Bellazzini, R. ^{[5
]}

Belli, F. ^{[12
,13
]}

Berenji, B. ^{[1
,2
]}

Blandford, R. D. ^{[1
,2
]}

Bloom, E. D. ^{[1
,2
]}

Bogart, J. R. ^{[1
,2
]}

Bonamente, E. ^{[14
,15
]}

Borgland, A. W. ^{[1
,2
]}

Brandt, T. J. ^{[11
,16
]}

Bregeon, J. ^{[5
]}

Brez, A. ^{[1
,5
]}

Brigida, M. ^{[17
,18
,19
]}

Bruel, P. ^{[20
]}

Buehler, R. ^{[1
,2
]}

Burnett, T. H. ^{[21
]}

Busetto, G. ^{[9
,10
]}

Buson, S. ^{[9
,10
]}

Caliandro, G. A. ^{[22
]}

Cameron, R. A. ^{[1
,2
]}

Caraveo, P. A. ^{[23
]}

Carlson, P. ^{[24
,25
]}

Carrigan, S. ^{[10
]}

Casandjian, J. M. ^{[6
]}

Ceccanti, M. ^{[5
]}

Cecchi, C. ^{[14
,15
]}

Celik, Oe ^{[26
,27
,28
,29
]}

Charles, E. ^{[1
,2
]}

Chekhtman, A. ^{[30
,31
]}

Cheung, C. C. ^{[30
,32
]}

Chiang, J. ^{[1
,2
]}

Cillis, A. N. ^{[26
,33
]}

Ciprini, S. ^{[15
]}

Claus, R. ^{[1
,2
]}

Cohen-Tanugi, J. ^{[34
]}

Conrad, J. ^{[25
,35
]}

Corbet, R. ^{[26
,28
,29
]}

DeKlotz, M. ^{[36
]}

Dermer, C. D. ^{[30
]}

de Angelis, A. ^{[37
,38
]}

de Palma, F. ^{[17
,18
,19
]}

机构：

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

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

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

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

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

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

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

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

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

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

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

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

[13] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy

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

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

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

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

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

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

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

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

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

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

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

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

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

[27] NASA, Ctr Res & Explorat Space Sci & Technol, CRESST, Greenbelt, MD 20771 USA

[28] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA

[29] Univ Maryland Baltimore Cty, Ctr Space Sci & Technol, Baltimore, MD 21250 USA

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

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

[32] Natl Acad Sci, Natl Res Council Res Associate, Washington, DC USA

[33] Parbellon IAFE, Inst Astron & Fis Espacio, Buenos Aires, DF, Argentina

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

[35] Stockholm Univ, Dept Phys, AlbaNova, SE-10691 Stockholm, Sweden

[36] Stellar Solut Inc, Palo Alto, CA 94306 USA

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

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

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

[40] Agenzia Spaziale Italiana ASI, Sci Data Ctr, I-00044 Rome, Italy

[41] INAF Ist Radioastron, I-40129 Bologna, Italy

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

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

[44] Univ Alabama, Ctr Space Plasma & Aeron Res CSPAR, Huntsville, AL 35899 USA

[45] ICREA, Barcelona, Spain

[46] Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan

[47] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[48] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

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

[50] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan

来源：

PHYSICAL REVIEW D | 2010年 / 82卷 / 09期

关键词：

LARGE-AREA TELESCOPE; SPACE-TELESCOPE; ENERGY-SPECTRA; SOLAR MINIMUM; POSITRONS; PROPAGATION; MODULATION; SPECTROMETER; GALAXY;

D O I：

10.1103/PhysRevD.82.092004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of our analysis of cosmic-ray electrons using about 8 x 10(6) electron candidates detected in the first 12 months on-orbit by the Fermi Large Area Telescope. This work extends our previously published cosmic-ray electron spectrum down to 7 GeV, giving a spectral range of approximately 2.5 decades up to 1 TeV. We describe in detail the analysis and its validation using beam-test and on-orbit data. In addition, we describe the spectrum measured via a subset of events selected for the best energy resolution as a cross-check on the measurement using the full event sample. Our electron spectrum can be described with a power law proportional to E-3.08+/-0.05 with no prominent spectral features within systematic uncertainties. Within the limits of our uncertainties, we can accommodate a slight spectral hardening at around 100 GeV and a slight softening above 500 GeV.

引用

页数：20

共 47 条

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