Sökning: "cosmological perturbations"

Hittade 5 avhandlingar innehållade orden cosmological perturbations.

  1. 1. Searches for Particle Dark Matter Dark stars, dark galaxies, dark halos and global supersymmetric fits

    Detta är en avhandling från Stockholm : Department of Physics, Stockholm University

    Författare :Pat Scott; Stockholms universitet.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; dark matter; supersymmetry; gamma rays; dwarf galaxies; stellar evolution; cosmological perturbations; phase transitions; statistical techniques; NATURAL SCIENCES Physics Elementary particle physics Astroparticle physics; NATURVETENSKAP Fysik Elementarpartikelfysik Astropartikelfysik; NATURAL SCIENCES Physics Astronomy and astrophysics Astroparticle physics; NATURVETENSKAP Fysik Astronomi och astrofysik Astropartikelfysik; NATURAL SCIENCES Physics Astronomy and astrophysics Cosmology; NATURVETENSKAP Fysik Astronomi och astrofysik Kosmologi; NATURAL SCIENCES Physics Elementary particle physics; NATURVETENSKAP Fysik Elementarpartikelfysik; NATURAL SCIENCES Physics Other physics Computational physics; NATURVETENSKAP Fysik Övrig fysik Beräkningsfysik; NATURAL SCIENCES Physics Astronomy and astrophysics Formation and development of stars; NATURVETENSKAP Fysik Astronomi och astrofysik Stjärnors bildning och utveckling; NATURAL SCIENCES Physics Astronomy and astrophysics High energy astrophysics; NATURVETENSKAP Fysik Astronomi och astrofysik Högenergiastrofysik; teoretisk fysik; Theoretical Physics;

    Sammanfattning : The identity of dark matter is one of the key outstanding problems in both particle and astrophysics. In this thesis, I describe a number of complementary searches for particle dark matter. LÄS MER

  2. 2. Gravitational perturbations in plasmas and cosmology

    Detta är en avhandling från Umeå : Institutionen för Fysik

    Författare :Mats Forsberg; Umeå universitet.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; general relativity; cosmology; gravitational waves; plasma; electromagnetic waves; nonlinear waves; NATURAL SCIENCES Physics Geocosmophysics and plasma physics Plasma physics; NATURVETENSKAP Fysik Geokosmofysik och plasmafysik Plasmafysik; NATURAL SCIENCES Physics Other physics Theory of relativity; gravitation; NATURVETENSKAP Fysik Övrig fysik Relativitetsteori; gravitation; NATURAL SCIENCES Physics Astronomy and astrophysics Cosmology; NATURVETENSKAP Fysik Astronomi och astrofysik Kosmologi; teoretisk fysik; Theoretical Physics;

    Sammanfattning : Gravitational perturbations can be in the form of scalars, vectors or tensors. This thesis focuses on the evolution of scalar perturbations in cosmology, and interactions between tensor perturbations, in the form of gravitational waves, and plasma waves. LÄS MER

  3. 3. Perturbative Methods in General Relativity

    Detta är en avhandling från Umeå : Fysik

    Författare :Daniel Eriksson; Umeå universitet.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; General relativity; perturbation theory; photon-photon scattering; cosmology; FRW models with cosmological constant; Bianchi type V; slowly rotating stars; Hartle formalism; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    Sammanfattning : Einstein's theory of general relativity is a cornerstone in the process of gaining increased understanding about problems of gravitational nature. It can be applied to problems on the huge length scales of cosmology and as far as we know it does not break down before the Planck scale is approached. LÄS MER

  4. 4. Strings, Gravitons, and Effective Field Theories

    Detta är en avhandling från Karlstad : Karlstads universitet

    Författare :Igor Buchberger; Karlstads universitet.; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; string theory; amplitudes; supersymmetry; particle phenomenology; BMSSM; modified gravity; bimetric; massive gravity; Lie algebras; ribbon categories; Physics; Fysik;

    Sammanfattning : This thesis concerns a range of aspects of theoretical physics. It is composed of two parts. In the first part we motivate our line of research, and introduce and discuss the relevant concepts. In the second part, four research papers are collected. LÄS MER

  5. 5. Unravelling Consistent Spin-2 Interactions

    Detta är en avhandling från Stockholm : Department of Physics, Stockholm University

    Författare :Mikael von Strauss; Stockholms universitet.; [2012]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Modified Gravity; Massive Spin-2; Spin-2 Interactions; Theoretical Physics; teoretisk fysik;

    Sammanfattning : Recently, a unique formulation of a classically consistent theory of massive spin-2 fields has emerged. In this thesis I address a few of the primary questions that arise once such a theory is available. LÄS MER