An upper limit to the photon fraction in cosmic rays above 1019 eV from the Pierre Auger Observatory

被引：89

作者：

Abraham, J. ^{[1
]}

Aglietta, M.

Aguirre, C.

Allard, D.

Allekotte, I.

Allison, P.

Alvarez, C.

Alvarez-Muniz, J.

Ambrosio, M.

Anchordoqui, L.

Anjos, J. C.

Aramo, C.

Arisaka, K.

Armengaud, E.

Arneodo, F.

Arqueros, F.

Asch, T.

Asorey, H.

Atulugama, B. S.

Aublin, J.

Ave, M.

Avila, G.

Bacelar, J.

Baecker, T.

Badagnani, D.

Barbosa, A. F.

Barbosa, H. M. J.

Barkhausen, M.

Barnhill, D.

Barroso, S. L. C.

Bauleo, P.

Beatty, J.

Beau, T.

Becker, B. R.

Becker, K. H.

Bellido, J. A.

BenZvi, S.

Berat, C.

Bergmann, T.

Bernardini, P.

Bertou, X.

Biermann, P. L.

Billoir, P.

Blanch-Bigas, O.

Blanco, F.

Blasi, P.

Bleve, C.

Bluemer, H.

Boghrat, P.

Bohacova, M.

机构：

[1] Consejo Nacl Invest Cient & Tecn, Inst Balseiro, CNEA, Ctr Atom Bariloche,UnCuyo, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[2] Consejo Nacl Invest Cient & Tecn, Inst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, Argentina

[3] Univ Tec Nac Reg Buenos Aires, CONICET, CNEA, Lan Tandar, RA-1650 Buenos Aires, DF, Argentina

[4] Pierre Auger So Observ, RA-5613 Mendoza, Argentina

[5] Natl Univ La Plata, Fac Ciencias Exactas, Dept Fis, RA-1900 La Plata, Argentina

[6] Univ Nacl Buenos Aires, FCEyN, Dept Fis, IFLP,CONCIET, RA-1900 La Plata, Argentina

[7] Univ Tecnol Nacl, CEILAP, CONICET, CITEFA, Mendoza, Argentina

[8] Univ Adelaide, Dept Phys, Adelaide, SA 5005, Australia

[9] Univ Catolica Bolivia, La Paz, Bolivia

[10] Univ Mayor San Andres, Monoblock Cent, Bolivia

[11] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, Brazil

[12] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil

[13] Univ Sao Paulo, Inst Astron & Geofis, BR-05315900 Sao Paulo, Brazil

[14] Univ Estadual Campinas, IFGW, Dept Raios Cosm & Cronol, BR-13083970 Campinas, SP, Brazil

[15] Univ Estadual Feira de Santana, Dept Fis, BR-44031460 Feira De Santana, Brazil

[16] Univ Fed Bahia, BR-40210340 Salvador, BA, Brazil

[17] Univ Estadual Sudoeste Bahia, Dept Ciencias Exatas, BR-45083900 Vitoria da Conquista, BA, Brazil

[18] Univ Fed Rio de Janeiro, Inst Fis, BR-21945970 Rio De Janeiro, Brazil

[19] Univ Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ, Brazil

[20] Charles Univ Prague, Inst Practicle & nucl Phys, Fac Math & Phys, CZ-18000 Prague 8, Czech Republic

[21] Acad Sci Czech Republ, Inst Phys, CZ-18221 Prague 8, Czech Republic

[22] Univ Paris 11, Inst Phys Nucl, F-91400 Orsay, France

[23] CNRS, IN2P3, F-91400 Orsay, France

[24] Univ Paris 07, Lab astroParticle & Cosmol, F-75231 Paris 05, France

[25] Univ Paris 11, Lab Accelerator, F-91898 Orsay, France

[26] CNRS, IN2P3, F-91898 Orsay, France

[27] Univ Paris 06, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France

[28] Univ Paris 07, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France

[29] CNRS, IN2P3, F-75252 Paris, France

[30] Univ Grenoble 1, CNRS, IN2P3, LPSC, F-38026 St Martin Dheres, France

[31] Berg Univ Wuppertal, Facberich C, D-42097 Wuppertal, Germany

[32] Forschungszentrum Karlsruhe, Inst Kernphys, D-76021 Karlsruhe, Germany

[33] Forschungszentrum Karlsruhe, Inst Prozessdatenverarbeit & Elect, D-76021 Karlsruhe, Germany

[34] Max Planck Inst Radioastron, D-53121 Bonn, Germany

[35] RWTH Aachen 3, Phys Inst A, Phys Zentrum, D-52056 Auchen, Germany

[36] Univ Karlsruhe, IEKP, D-76128 Karlsruhe, Germany

[37] Univ Siegen, Facberich Phys 7, D-57068 Siegen, Germany

[38] Natl Tech Univ Athens, Dept Phys, Sch Appl Sci, Zografos 15780, Greece

[39] Univ Athens, Dept Phys, Nucl & Particle Phys Sect, Ilissia 15771, Greece

[40] Univ Aquila, Dipartimento Fis, I-67010 Laquila, Italy

[41] INFN, I-67010 Laquila, Italy

[42] Univ Lecce, Dipartimento Fis, I-73100 Lecce, Italy

[43] Sezione Ist Nazl Fis Nucl, I-73100 Lecce, Italy

[44] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[45] Univ Naples Federico II, Dipartimento Fis, I-80123 Naples, Italy

[46] Univ Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, Italy

[47] Sezione Ist Nazl Fis Nucl, I-20133 Milan, Italy

[48] Sezione Ist Nazl Fis Nucl, I-80123 Naples, Italy

[49] Sezione Ist Nazl Fis Nucl, I-00173 Rome, Italy

[50] Univ Turin, Dipartimento Fis, I-10125 Turin, Italy

来源：

ASTROPARTICLE PHYSICS | 2007年 / 27卷 / 2-3期

基金：

美国国家科学基金会;

关键词：

cosmic rays; ultra-high energy photons; extensive air showers; Pierre Auger Observatory;

D O I：

10.1016/j.astropartphys.2006.10.004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

An upper limit of 16% (at 95% c.l.) is derived for the photon fraction in cosmic rays with energies greater than 10(19) eV, based on observations of the depth of shower maximum performed with the hybrid detector of the Pierre Auger Observatory. This is the first such limit on photons obtained by observing the fluorescence light profile of air showers. This upper limit confirms and improves on previous results from the Haverah Park and AGASA surface arrays. Additional data recorded with the Auger surface detectors for a subset of the event sample support the conclusion that a photon origin of the observed events is not favored. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：155 / 168

页数：14

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