Evolution of primordial magnetic fields in the early universe [Elektronische Ressource] / von Robi Banerjee

Evolution of primordial magnetic elds in the early universeDissertationvonRobi BanerjeeMax-Planck-Institut fur AstrophysikLudwig-Maximilians-Universitat Munchen Oktober 20021. Gutachter: Prof. Dr. Simon D. M. White2.hter: Prof. Dr. Harald LeschTag der mundlichen Prufung: 7. April 2003 InhaltsverzeichnisZusammenfassung (Summary in German) 31. Introduction 72. Cosmic magnetic elds 112.1. Observations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112.2. Constraints on primordial magnetic elds . . . . . . . . . . . . . . . . 122.2.1. Constraints by the CMBR . . . . . . . . . . . . . . . . . . . . 122.2.2.ts from big bang nucleosynthesis . . . . . . . . . . . 132.3. Models of magnetogenesis . . . . . . . . . . . . . . . . . . . . . . . . 142.3.1. Astrophysical models . . . . . . . . . . . . . . . . . . . . . . . 152.3.2. Models of primordial magnetogenesis . . . . . . . . . . . . . . 153. Imperfect uid dynamics and magnetic elds in the expanding universe 193.1. Imperfect uid dynamics . . . . . . . . . . . . . . . . . . . . . . . . . 193.2. Covariant description of electromagnetic elds . . . . . . . . . . . . . 223.2.1. Medium with in nite conductivity . . . . . . . . . . . . . . . . 243.3. The MHD equations in the FRW universe . . . . . . . . . . . . . . . 253.4. MHD equations in the radiation dominated universe . . . . . . . . . . 283.4.1. The incompressible limit . . . . . . . . . . . . . . . . . . . . . 293.4.2.