Search for dissertations about: "cosmic ray"

Showing result 1 - 5 of 50 swedish dissertations containing the words cosmic ray.

  2. 1. Gamma-Ray Emission from Galaxy Clusters : DARK MATTER AND COSMIC-RAYS

    Author : Anders Pinzke; Lars Bergström; Olaf Reimer; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Galaxy clusters; gamma-rays; cosmic-rays; dark matter; High energy astrophysics; Högenergiastrofysik; teoretisk fysik; Theoretical Physics;

    Abstract : The quest for the first detection of a galaxy cluster in the high energy gamma-ray regime is ongoing, and even though clusters are observed in several other wave-bands, there is still no firm detection in gamma-rays. To complement the observational efforts we estimate the gamma-ray contributions from both annihilating dark matter and cosmic-ray (CR) proton as well as CR electron induced emission. READ MORE

  4. 2. Cosmic-ray records and intensity variations during cosmic ray storms

    Author : Bo Östman; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : .... READ MORE

  5. 3. Cosmic rays and shock physics in gamma-ray bursts

    Author : Filip Samuelsson; Felix Ryde; Robert Mochkovitch; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; astrophysics; gamma-ray bursts; cosmic rays; radiation-mediated shocks; Atomic; Subatomic and Astrophysics; Atomär fysik; subatomär fysik och astrofysik;

    Abstract : Gamma-ray bursts (GRBs) are the most luminous events in the known universe. Due to their tremendous energy output, they serve as laboratories of physics far beyond anything that we can hope to achieve in terrestrial experiments. READ MORE

  6. 4. Measurements of Cosmic Ray Antiprotons with PAMELA

    Author : Juan Wu; Mark Pearce; Olga Botner; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; cosmic ray antiproton PAMELA; Astroparticle physics; Astropartikelfysik;

    Abstract : .... READ MORE

  7. 5. Measurements of cosmic ray antiprotons with PAMELA and studies of propagation models

    Author : Juan Wu; Mark Pearce; Fiorenza Donato; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; cosmic ray; PAMELA; antiproton flux; propagation;

    Abstract : Studying the acceleration and propagation mechanisms of Galactic cosmic rays can provide information regarding astrophysical sources, the properties of our Galaxy, and possible exotic sources such as dark matter. To understand cosmic ray acceleration and propagation mechanisms, accurate measurements of different cosmic ray elements over a wide energy range are needed. READ MORE