Unit:
Κατεύθυνση ΑστροφυσικήLibrary of the School of Science
Author:
Tsilimidou Anastasia
Supervisors info:
Πετροπούλου Μαρία, Επίκουρη Καθηγήτρια, Τμήμα Φυσικής, ΕΚΠΑ,
Μαστιχιάδης Απόστολος, Αφυπ. Καθηγητής, Τμήμα Φυσικής, ΕΚΠΑ,
Βλαχάκης Νεκτάριος, Καθηγητής, Τμήμα Φυσικής, ΕΚΠΑ
Original Title:
Παραγωγή κοσμικών ακτίνων από Blazar υπό συνθήκες ελαχιστοποίησης της ισχύος των πιδάκων τους
Translated title:
Production of cosmic rays from blazars under conditions of minimization of the power of their jets
Summary:
The purpose of this thesis is to calculate the flux of cosmic rays from blazars under conditions of minimization of the power of their jets. Using the equations from Maria Petropoulou and Charles D. Dermer, Properties of Blazar Jets Defined by an Economy of Power, we have the equations for the minimum magnetic field and the minimum Doppler factor that are required for these conditions. We assume that protons interact with photons and we focus on the interaction that produces neutrons. Neutrons escape from the jet, since they are neutrally charged, then decay and produce protons (cosmic rays) and neutrinos. We use the simulation framework CRPropa to study the propagation of these high energy protons based on a sample of 23 blazars. We calculate the minimum flux of cosmic rays and neutrinos and we also estimate the flux that we would have calculated if the sample was the 2026 blazars (1371 BL Lacs and 655 FSRQs) which had been discovered until 2020.
Main subject category:
Science
Keywords:
blazar, cosmic rays, astrophysical neutrinos
