Korelacija porazdelitve visokoenergetskih nevtrinov in sledilcev kozmične strukture

• Main Author: Fridman, Mitja
• Other Authors: Zwitter, Tomaž
• Format: Master Thesis
• Language: Slovenian
• Published: 2018
• Subjects: IceCube; nevtrini; kozmični žarki; statistika; korelacije; spekter moči; Monte Carlo; neutrinos; cosmic rays; statistics; correlations; power spectrum; sami
• Online Access: https://repozitorij.uni-lj.si/IzpisGradiva.php?id=103720; https://repozitorij.uni-lj.si/Dokument.php?id=114197&dn=; https://plus.si.cobiss.net/opac7/bib/3242340?lang=sl

Nevtrinski observatorij IceCube je v obdobju med 2008 in 2011 zaznal nekaj čez $10^5$ nevtrinskih dogodkov, katerim so bile določene smeri iz katerih so prišli, energije sekundarnih mionov in merske napake. Najprej je na kratko predstavljen nevtrinski observatorij IceCube. Sledi predstavitev teorije korelacijske analize za sferične karte neba in izpeljave standardne pseudo-$C_ell$ cenilke spektra moči. Podatki iz observatorija IceCube so najprej korelirani sami s sabo in nato še z drugimi potencialno relevantnimi astrofizikalnimi kartami. Astrofizikalne karte so izbrane brez teoretičnega predsodka. Vse korelacije so konsistentne z ničelno hipotezo, v kateri nevtrinski dogodki niso zgručeni. Between 2008 and 2011, the IceCube Neutrino Observatory detected over $10^5$ neutrino events, for which the arrival directions, energies of secondary muons and angular positional errors have been determined. First, the IceCube Neutrino Observatory is briefly presented. The theory of the correlation analysis for spherical sky maps and the standard pseudo-$C_ell$ power spectrum estimator are then presented. The data from the IceCube observatory are then correlated with it self and with other astrophysical maps of potential relevance. The astrophysical maps were chosen without theoretical prejudice. The auto and cross-correlations analyzed in this work do not show any evidence for a non-zero correlation.