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

Aab, Alexander

doi:10.1140/epjc/s10052-015-3471-0

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. As a result, 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.

Authors:

Aab, Alexander ^[1]

Univ. Siegen, Siegen (Germany). et al.

Publication Date:: Sat Jun 20 00:00:00 EDT 2015

Research Org.:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Org.:: Pierre Auger Collaboration

OSTI Identifier:: 1226294

Report Number(s):: FERMILAB-PUB-14-384-AD-AE-CD-TD
Journal ID: ISSN 1434-6044; arXiv eprint number arXiv:1410.0515

Grant/Contract Number:: AC02-07CH11359

Resource Type:: Accepted Manuscript

Journal Name:: European Physical Journal. C, Particles and Fields

Additional Journal Information:: Journal Volume: 75; Journal ID: ISSN 1434-6044

Publisher:: Springer

Country of Publication:: United States

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS

Citation Formats


                    Aab, Alexander. Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory.  United States: N. p., 2015. 
Web.  doi:10.1140/epjc/s10052-015-3471-0.

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                    Aab, Alexander. Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory.  United States.  https://doi.org/10.1140/epjc/s10052-015-3471-0

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                    Aab, Alexander. Sat .  
"Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory".  United States.  https://doi.org/10.1140/epjc/s10052-015-3471-0.  https://www.osti.gov/servlets/purl/1226294.

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@article{osti_1226294,

  title        = {Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory},

  author       = {Aab, Alexander},

  abstractNote = {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. As a result, 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.},

  doi          = {10.1140/epjc/s10052-015-3471-0},

  journal      = {European Physical Journal. C, Particles and Fields},

  number       = ,

  volume       = 75,

  place        = {United States},

  year         = {Sat Jun 20 00:00:00 EDT 2015},

  month        = {Sat Jun 20 00:00:00 EDT 2015}

}

Copy to clipboard

Journal Article:

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https://doi.org/10.1140/epjc/s10052-015-3471-0

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Cited by: 8 works

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Figures / Tables:

Fig. 1: Generation of anisotropically distributed UHECRs in a region of interest. a First, UHECRs are distributed symmetrically around the center of the ROI using a Fisher distribution with energy dependent concentration parameter according to Eq. (6). b The UHECRs are then deflected in one direction using Eq. (8). cmore »

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Works referenced in this record:

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

Abstract

Citation Formats

Figures / Tables:

The Astrophysics of Ultrahigh-Energy Cosmic Rays journal, September 2011

Measurement of the energy spectrum of cosmic rays above 1018 eV using the Pierre Auger Observatory journal, March 2010

The principal axis of jets — an attempt to analyse high-energy collisions as two-body processes journal, September 1964

Energy Correlations in Electron-Positron Annihilation: Testing Quantum Chromodynamics journal, December 1978

A model for the time uncertainty measurements in the Auger surface detector array journal, January 2008

Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei journal, April 2008

Search for signatures of magnetically-induced alignment in the arrival directions measured by the Pierre Auger Observatory journal, January 2012

HEALPix: A Framework for High‐Resolution Discretization and Fast Analysis of Data Distributed on the Sphere journal, April 2005

Correlation of the Highest-Energy Cosmic Rays with Nearby Extragalactic Objects journal, November 2007

Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter journal, December 2010

End to the Cosmic-Ray Spectrum? journal, April 1966

Quantum Chromodynamics Test for Jets journal, December 1977

Cosmic ray anisotropy analysis with a full-sky observatory journal, January 2001

Dispersion on a Sphere journal, May 1953

Magnetic Fields in the Large-Scale Structure of the Universe journal, October 2011

CRT: A numerical tool for propagating ultra-high energy cosmic rays through Galactic magnetic field models journal, November 2010

The Galactic Magnetic Field journal, November 2012

Presentation of search results: the CL s technique journal, September 2002

Trigger and aperture of the surface detector array of the Pierre Auger Observatory journal, January 2010

The First Magnetic Fields journal, October 2011

Lensing of ultra-high energy cosmic rays in turbulent magnetic fields journal, March 2002

Ultra–high-Energy Cosmic-Ray Sources and Large-Scale Magnetic Fields journal, September 1997

Properties and performance of the prototype instrument for the Pierre Auger Observatory journal, May 2004

PARSEC: A parametrized simulation engine for ultra-high energy cosmic ray protons journal, February 2014

A method of measuring cosmic magnetic fields with ultra high energy cosmic ray data journal, May 2010

Observation of void formation patterns in SnAg films undergoing electromigration and simulation using random walk methods journal, April 2021

Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei text, January 2007

Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter text, January 2010

The Astrophysics of Ultrahigh Energy Cosmic Rays text, January 2011

The First Magnetic Fields text, January 2011

Magnetic fields in the Large-Scale Structure of the Universe text, January 2011

A New Model of the Galactic Magnetic Field text, January 2012

HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere text, January 2004

Magnetic Fields in the Large-Scale Structure of the Universe journal, October 2011

A model for the time uncertainty measurements in the Auger surface detector array journal, January 2008

Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter journal, December 2010

Properties and performance of the prototype instrument for the Pierre Auger Observatory journal, May 2004

Ultra–high-Energy Cosmic-Ray Sources and Large-Scale Magnetic Fields journal, September 1997

HEALPix: A Framework for High‐Resolution Discretization and Fast Analysis of Data Distributed on the Sphere journal, April 2005

Dispersion on a Sphere journal, May 1953

Correlation of the Highest-Energy Cosmic Rays with Nearby Extragalactic Objects journal, November 2007

Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei text, January 2007

CRT: A numerical tool for propagating ultra-high energy cosmic rays through Galactic magnetic field models text, January 2010

The Astrophysics of Ultrahigh Energy Cosmic Rays text, January 2011

The First Magnetic Fields text, January 2011

Search for signatures of magnetically-induced alignment in the arrival directions measured by the Pierre Auger Observatory text, January 2011

Trigger and Aperture of the Surface Detector Array of the Pierre Auger Observatory text, January 2011

Detecting Local Deflection Patterns of Ultra-high Energy Cosmic Rays using the Principal Axes of the Directional Energy Distribution preprint, January 2013

Lensing of ultra-high energy cosmic rays in turbulent magnetic fields text, January 2002

The Astrophysics of Ultrahigh-Energy Cosmic Rays
journal, September 2011

Measurement of the energy spectrum of cosmic rays above 1018 eV using the Pierre Auger Observatory
journal, March 2010

The principal axis of jets — an attempt to analyse high-energy collisions as two-body processes
journal, September 1964

Energy Correlations in Electron-Positron Annihilation: Testing Quantum Chromodynamics
journal, December 1978

A model for the time uncertainty measurements in the Auger surface detector array
journal, January 2008

Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
journal, April 2008

Search for signatures of magnetically-induced alignment in the arrival directions measured by the Pierre Auger Observatory
journal, January 2012

HEALPix: A Framework for High‐Resolution Discretization and Fast Analysis of Data Distributed on the Sphere
journal, April 2005

Correlation of the Highest-Energy Cosmic Rays with Nearby Extragalactic Objects
journal, November 2007

Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter
journal, December 2010

End to the Cosmic-Ray Spectrum?
journal, April 1966

Quantum Chromodynamics Test for Jets
journal, December 1977

Cosmic ray anisotropy analysis with a full-sky observatory
journal, January 2001

Dispersion on a Sphere
journal, May 1953

Magnetic Fields in the Large-Scale Structure of the Universe
journal, October 2011

CRT: A numerical tool for propagating ultra-high energy cosmic rays through Galactic magnetic field models
journal, November 2010

The Galactic Magnetic Field
journal, November 2012

Presentation of search results: the CL _s technique
journal, September 2002

Trigger and aperture of the surface detector array of the Pierre Auger Observatory
journal, January 2010

The First Magnetic Fields
journal, October 2011

Lensing of ultra-high energy cosmic rays in turbulent magnetic fields
journal, March 2002

Ultra–high-Energy Cosmic-Ray Sources and Large-Scale Magnetic Fields
journal, September 1997

Properties and performance of the prototype instrument for the Pierre Auger Observatory
journal, May 2004

PARSEC: A parametrized simulation engine for ultra-high energy cosmic ray protons
journal, February 2014

A method of measuring cosmic magnetic fields with ultra high energy cosmic ray data
journal, May 2010

Observation of void formation patterns in SnAg films undergoing electromigration and simulation using random walk methods
journal, April 2021

Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
text, January 2007

Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter
text, January 2010

The Astrophysics of Ultrahigh Energy Cosmic Rays
text, January 2011

The First Magnetic Fields
text, January 2011

Magnetic fields in the Large-Scale Structure of the Universe
text, January 2011

A New Model of the Galactic Magnetic Field
text, January 2012

HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
text, January 2004

Magnetic Fields in the Large-Scale Structure of the Universe
journal, October 2011

A model for the time uncertainty measurements in the Auger surface detector array
journal, January 2008

Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter
journal, December 2010

Properties and performance of the prototype instrument for the Pierre Auger Observatory
journal, May 2004

Ultra–high-Energy Cosmic-Ray Sources and Large-Scale Magnetic Fields
journal, September 1997

HEALPix: A Framework for High‐Resolution Discretization and Fast Analysis of Data Distributed on the Sphere
journal, April 2005

Dispersion on a Sphere
journal, May 1953

Correlation of the Highest-Energy Cosmic Rays with Nearby Extragalactic Objects
journal, November 2007

Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
text, January 2007

CRT: A numerical tool for propagating ultra-high energy cosmic rays through Galactic magnetic field models
text, January 2010

The Astrophysics of Ultrahigh Energy Cosmic Rays
text, January 2011

The First Magnetic Fields
text, January 2011

Search for signatures of magnetically-induced alignment in the arrival directions measured by the Pierre Auger Observatory
text, January 2011

Trigger and Aperture of the Surface Detector Array of the Pierre Auger Observatory
text, January 2011

Detecting Local Deflection Patterns of Ultra-high Energy Cosmic Rays using the Principal Axes of the Directional Energy Distribution
preprint, January 2013

Lensing of ultra-high energy cosmic rays in turbulent magnetic fields
text, January 2002