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Type: Theses
Title: Large-scale-structure in the Pierre Auger Observatory data directions
Author: Sorokin, Jennifer
Issue Date: 2016
School/Discipline: School of Physical Sciences
Abstract: This thesis presents a method of analysis of Pierre Auger Observatory Cosmic Ray (CR) directions. I look for evidence of large-scale-structure within these CR directions. I have associated directional events by virtue of the angular proximity of their arrival directions, and within three energy ranges around the Greisen-Zatsepin-Kusmin (GZK) energy limit. I design graph theoretical algorithms to grow minimum spanning trees for these directional events and then ‘cut’ the trees along certain galactic longitudes and latitudes into ‘branches’, where I expect the galactic magnetic fields or cosmic ray point-sources to exhibit behaviours or patterns, which can be interpreted by branch features. 1,200 simulated CR directions in each energy range provide some statistical context for the Pierre Auger Observatory branch features which may be considered significant. The thesis is a preliminary study of a method of analysis of ‘regions of interest’ which later may be optimized with a full statistical ‘tuning’ analysis.
Advisor: Clay, Roger William
Dissertation Note: Thesis (Ph.D.) -- University of Adelaide, School of Physical Sciences, 2016.
Keywords: Yggdrasil
minimum spanning tree
Provenance: This electronic version is made publicly available by the University of Adelaide in accordance with its open access policy for student theses. Copyright in this thesis remains with the author. This thesis may incorporate third party material which has been used by the author pursuant to Fair Dealing exceptions. If you are the owner of any included third party copyright material you wish to be removed from this electronic version, please complete the take down form located at:
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