Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory

The Pierre Auger Collaboration

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Energy-dependent patterns in the arrival directions of cosmic rays are searched for using data of the Pierre Auger Observatory. We investigate local regions around the highest-energy cosmic rays with E ≥ 6×1019 eV by analyzing cosmic rays with energies above E ≥ 5×1018 eV arriving within an angular separation of approximately 15. We characterize the energy distributions inside these regions by two independent methods, one searching for angular dependence of energy-energy correlations and one searching for collimation of energy along the local system of principal axes of the energy distribution. No significant patterns are found with this analysis. The comparison of these measurements with astrophysical scenarios can therefore be used to obtain constraints on related model parameters such as strength of cosmic-ray deflection and density of point sources.

Original languageEnglish (US)
Article number269
JournalEuropean Physical Journal C
Volume75
Issue number6
DOIs
StatePublished - Jun 23 2015

Fingerprint

Cosmic rays
Observatories
arrivals
cosmic rays
observatories
energy
Direction of arrival
energy distribution
collimation
point sources
deflection
astrophysics

All Science Journal Classification (ASJC) codes

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

Cite this

@article{2bcc9d5a1fc44895a05f610c1ed26ce2,
title = "Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory",
abstract = "Energy-dependent patterns in the arrival directions of cosmic rays are searched for using data of the Pierre Auger Observatory. We investigate local regions around the highest-energy cosmic rays with E ≥ 6×1019 eV by analyzing cosmic rays with energies above E ≥ 5×1018 eV arriving within an angular separation of approximately 15∘. We characterize the energy distributions inside these regions by two independent methods, one searching for angular dependence of energy-energy correlations and one searching for collimation of energy along the local system of principal axes of the energy distribution. No significant patterns are found with this analysis. The comparison of these measurements with astrophysical scenarios can therefore be used to obtain constraints on related model parameters such as strength of cosmic-ray deflection and density of point sources.",
author = "{The Pierre Auger Collaboration} and A. Aab and P. Abreu and M. Aglietta and Ahn, {E. J.} and Samarai, {I. Al} and Albuquerque, {I. F.M.} and I. Allekotte and J. Allen and P. Allison and A. Almela and Castillo, {J. Alvarez} and J. Alvarez-Mu{\~n}iz and Batista, {R. Alves} and M. Ambrosio and A. Aminaei and L. Anchordoqui and S. Andringa and C. Aramo and Aranda, {V. M.} and F. Arqueros and H. Asorey and P. Assis and J. Aublin and M. Ave and M. Avenier and G. Avila and N. Awal and Badescu, {A. M.} and Barber, {K. B.} and J. B{\"a}uml and C. Baus and Beatty, {J. J.} and Becker, {K. H.} and Bellido, {J. A.} and C. Berat and Bertaina, {M. E.} and X. Bertou and Biermann, {P. L.} and P. Billoir and S. Blaess and M. Blanco and C. Bleve and H. Bl{\"u}mer and M. Boh{\'a}čov{\'a} and D. Boncioli and C. Bonifazi and R. Bonino and N. Borodai and Stephane Coutu and Mostafa, {Miguel Alejandro}",
year = "2015",
month = "6",
day = "23",
doi = "10.1140/epjc/s10052-015-3471-0",
language = "English (US)",
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journal = "European Physical Journal C",
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Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory. / The Pierre Auger Collaboration.

In: European Physical Journal C, Vol. 75, No. 6, 269, 23.06.2015.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory

AU - The Pierre Auger Collaboration

AU - Aab, A.

AU - Abreu, P.

AU - Aglietta, M.

AU - Ahn, E. J.

AU - Samarai, I. Al

AU - Albuquerque, I. F.M.

AU - Allekotte, I.

AU - Allen, J.

AU - Allison, P.

AU - Almela, A.

AU - Castillo, J. Alvarez

AU - Alvarez-Muñiz, J.

AU - Batista, R. Alves

AU - Ambrosio, M.

AU - Aminaei, A.

AU - Anchordoqui, L.

AU - Andringa, S.

AU - Aramo, C.

AU - Aranda, V. M.

AU - Arqueros, F.

AU - Asorey, H.

AU - Assis, P.

AU - Aublin, J.

AU - Ave, M.

AU - Avenier, M.

AU - Avila, G.

AU - Awal, N.

AU - Badescu, A. M.

AU - Barber, K. B.

AU - Bäuml, J.

AU - Baus, C.

AU - Beatty, J. J.

AU - Becker, K. H.

AU - Bellido, J. A.

AU - Berat, C.

AU - Bertaina, M. E.

AU - Bertou, X.

AU - Biermann, P. L.

AU - Billoir, P.

AU - Blaess, S.

AU - Blanco, M.

AU - Bleve, C.

AU - Blümer, H.

AU - Boháčová, M.

AU - Boncioli, D.

AU - Bonifazi, C.

AU - Bonino, R.

AU - Borodai, N.

AU - Coutu, Stephane

AU - Mostafa, Miguel Alejandro

PY - 2015/6/23

Y1 - 2015/6/23

N2 - Energy-dependent patterns in the arrival directions of cosmic rays are searched for using data of the Pierre Auger Observatory. We investigate local regions around the highest-energy cosmic rays with E ≥ 6×1019 eV by analyzing cosmic rays with energies above E ≥ 5×1018 eV arriving within an angular separation of approximately 15∘. We characterize the energy distributions inside these regions by two independent methods, one searching for angular dependence of energy-energy correlations and one searching for collimation of energy along the local system of principal axes of the energy distribution. No significant patterns are found with this analysis. The comparison of these measurements with astrophysical scenarios can therefore be used to obtain constraints on related model parameters such as strength of cosmic-ray deflection and density of point sources.

AB - Energy-dependent patterns in the arrival directions of cosmic rays are searched for using data of the Pierre Auger Observatory. We investigate local regions around the highest-energy cosmic rays with E ≥ 6×1019 eV by analyzing cosmic rays with energies above E ≥ 5×1018 eV arriving within an angular separation of approximately 15∘. We characterize the energy distributions inside these regions by two independent methods, one searching for angular dependence of energy-energy correlations and one searching for collimation of energy along the local system of principal axes of the energy distribution. No significant patterns are found with this analysis. The comparison of these measurements with astrophysical scenarios can therefore be used to obtain constraints on related model parameters such as strength of cosmic-ray deflection and density of point sources.

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U2 - 10.1140/epjc/s10052-015-3471-0

DO - 10.1140/epjc/s10052-015-3471-0

M3 - Article

VL - 75

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 6

M1 - 269

ER -