Sökning: "Cosmological"

Visar resultat 1 - 5 av 102 avhandlingar innehållade ordet Cosmological.

  1. 1. Cosmological constants galore

    Författare :Ola Boström; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; general relativity; Schwarzschild solution; cosmological constants; Newton s inversive square law; Ashtekar s variables;

    Sammanfattning : .... LÄS MER

  3. 2. Observations of distant supernovae and cosmological implications

    Författare :Rahman Amanullah; Ariel Goobar; Adam Riess; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cosmological parameters; cosmology; astro physics; supernovae; type Ia supernova; Cosmology; Kosmologi;

    Sammanfattning : Type Ia supernovae can be used as distance indicators for probing the expansion history of the Universe. The method has proved to be an efficient tool in cosmology and played a decisive role in the discovery of a yet unknown energy form, dark energy, that drives the accelerated expansion of the Universe. LÄS MER

  4. 3. Cosmological aspects of universal extra dimensions

    Författare :Torsten Bringmann; Lars Bergström; Pierre Binetruy; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cosmology; dark matter; extra dimensions; Cosmology; Kosmologi;

    Sammanfattning : It is an intriguing possibility that our world may consist of more than three spatial dimensions, compactified on such a small scale that they so far have escaped detection. In this thesis, a particular realization of this idea -- the scenario of so-called 'universal extra dimensions' (UED) -- is studied in some detail, with a focus on cosmological consequences and appplications. LÄS MER

  5. 4. Cosmological Models and Singularities in General Relativity

    Författare :Patrik Sandin; Claes Uggla; Alan Coley; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; general relativity; Bianchi cosmology; singularities; dynamical systems; Fuchsian methods; Hamiltonian methods; Theory of relativity; gravitation; Relativitetsteori; gravitation; Physics; Fysik;

    Sammanfattning : This is a thesis on general relativity. It analyzes dynamical properties of Einstein's field equations in cosmology and in the vicinity of spacetime singularities in a number of different situations. LÄS MER

  7. 5. The asymptotic states of perfect fluid cosmological models

    Författare :Patrik Sandin; Claes Uggla; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; Physics; Fysik;

    Sammanfattning : .... LÄS MER