Search for dissertations about: "astro physics"

Found 4 swedish dissertations containing the words astro physics.

  1. 1. A search for solar dark matter with the IceCube neutrino telescope

    Author : Gustav Wikström; Klas Hultqvist; John Carr; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Dark matter; neutrinos; neutrino telescopes; IceCube; Astroparticle physics; Astropartikelfysik; fysik; Physics;

    Abstract : Dark matter particles in the form of supersymmetric Weakly Interacting Massive Particles (WIMPs) could accumulate in the centre of the Sun because of gravitational trapping. Pair-wise annihilations of WIMPs could create standard model particles out of which neutrinos could reach the Earth. READ MORE

  2. 2. Examination of Dissociative Recombination Processes of Importance for Astrochemically Evolving Interstellar Clouds

    Author : Matthias Hamberg; Wolf Geppert; Peder Royen; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Dissociative Recombination Astro Chemistry; Chemical physics; Kemisk fysik; kemisk fysik; Chemical Physics;

    Abstract : Each single moment a myriad of processes is taking place throughout the universe. A great deal of them has been found to be dissociative recombination (DR) reactions. In this thesis the major work described are related to experimental determination of reaction rates and how the reaction products splits up into their final fragments. READ MORE

  3. 3. 1D to 3D Magnetism in Quantum Materials: A study by Muons, Neutrons & X-rays

    Author : Ola Kenji Forslund; Martin Månsson; Robert Kiefl; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; muon; magnetism; scattering; quantum materials; Material and Nano Physics; Material- och nanofysik;

    Abstract : A collection of works stretching from low- to three-dimensional magnetism are presented, studied mostly through muon spin rotation, relaxation and resonance (µ +SR). The theoretical background of this technique is outlined in Chapter 2, which introduces the subject from the muon particle as an astro[1]nomical particle to how they are produced here on Earth. READ MORE

  4. 4. Observations of distant supernovae and cosmological implications

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

    Abstract : 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. READ MORE