Essays about: "Einsteins fältekvationer"

Showing result 1 - 5 of 7 essays containing the words Einsteins fältekvationer.

  1. 1. Matter-streams as sources of the Kerr metric

    University essay from Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

    Author : Julian Boy; [2022]
    Keywords : General Relativity; Black holes; Physics; Kerr metric; Physics and Astronomy;

    Abstract : An introduction to the thin-shell formalism and distributional approach to General Relativity is provided. The formalism is utilized to investigate possible distributions of matter that can act as a source to the Kerr metric. READ MORE

  3. 2. Spherically Symmetric Gravitational Collapse

    University essay from Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

    Author : Lucas Bring; [2021]
    Keywords : gravitational collapse; gravitation; general relativity; black hole; Schwarzschild coordinates; Gullstrand-Painleve coordinates; Friedmann-Robertson-Walker metric; finite-time collapse; Physics and Astronomy;

    Abstract : This thesis presents a derivation of the equation of motion of particles in a dust star, as it undergoes collapse. This is done by finding exact solutions to the Einstein field equations. We follow the original work by Oppenheimer and Snyder, starting from the general spherically symmetric metric in comoving coordinates. READ MORE

  4. 3. Simple cosmological models and their descriptions of the universe

    University essay from Linköpings universitet/Matematik och tillämpad matematik

    Author : Emil Gustafsson; [2018]
    Keywords : Tensors; General relativity; Einstein s field equations; Cosmology; Friedmann s equation; FLRW-spacetimes; Tensorer; Allmän relativitetsteori; Einsteins fältekvationer; Kosmologi; Friedmanns ekvation; FLRW-rumtider;

    Abstract : Cosmology is the study of the universe as a whole, and attempts to describe the behaviour of the universe mathematically. The simplest relativistic cosmological models are derived from Einstein's field equations with the assumptions of isotropy and homogeneity. READ MORE

  5. 4. Invariant Construction of Cosmological Models

    University essay from Umeå universitet/Institutionen för fysik

    Author : Erik Jörgenfelt; [2016]
    Keywords : ;

    Abstract : Solutions to the Einstein field equations can be constructed from invariant objects. If a solution is found it is locally equivalent to all solutions constructed from the same set. READ MORE

  6. 5. 3+1 Approach to Cosmological Perturbations : Deriving the First Order Scalar Perturbations of the Einstein Field Equations

    University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Author : Söderkvist Vermelin Wilhelm; [2016]
    Keywords : physics; astronomy; theoretical physics; perturbation; cosmology; cosmological perturbations; 3 1 formalism; first order perturbation; perturbation theory; universe; fysik; astronomi; teoretisk fysik; störning; störningsräkning; kosmologi; kosmologiska störningar; kosmologisk störningsräkning; 3 1 formalismen; första ordningens störningar; störningsteori; universum;

    Abstract : Experimental data suggest that the universe is homogeneous and isotropic on sufficiently large scales. An exact solution of the Einstein field equations exists for a homogeneous and isotropic universe, also known as a Friedmann-Lemaître-Robertson-Walker (FLRW) universe. READ MORE