Sökning: "astrophysics"

Visar resultat 1 - 5 av 24 uppsatser innehållade ordet astrophysics.

  1. 1. The impact of turbulence on supernovae shockwaves

    Kandidat-uppsats, Lunds universitet/Astronomi

    Författare :Loke Lönnblad Ohlin; [2018]
    Nyckelord :astrophysics; astronomy; supernovae; shockwaves; interstellar medium; massive stars; turbulence; molecular clouds; Physics and Astronomy;

    Sammanfattning : The momentum and energy injection from supernovae is one of the main feedback modes, and is therefore key to the understanding of galaxy evolution and star formation. However, due to low resolution, large scale galaxy simulations often have issues with accurately modelling supernovae, and therefore rely on sub-grid models. LÄS MER

  2. 2. Tekniker för detektion av neutriner med ultrahög energi


    Författare :Lawen Ahmedi; Mubarak Ali; Larisa Castellanos; [2017]
    Nyckelord :Teknik; tekniker; detektion; detektera; detektorer; detektor; observator; elementarpartikel; neutrino; neutriner; ultrahög; energi; fysik; astronomi; astrofysik; kosmisk strålning; radiostrålning; radiostrålar; partikel; partiklar;

    Sammanfattning : This project highlights various methods used to detect the elongated elemental particle neutrino. It is especially focused on the IceCube observatory, which uses Cherenkov light to detect these particles. LÄS MER

  3. 3. Mapping the present-day chemical abundance structure of the Solar neighbourhood: O & Si

    Master-uppsats, Lunds universitet/Institutionen för astronomi och teoretisk fysik; Lunds universitet/Astronomi

    Författare :Kristiina Verro; [2017]
    Nyckelord :astrophysics; stellar spectroscopy; abundance analysis; solar neighbourhood; massive stars; Galaxy; Physics and Astronomy;

    Sammanfattning : Context. Large scale chemical abundance gradients in the Galactic disks, small-scale abundance structures, and the mean chemical abundance values in the Solar vicinity, are important constraints to Galactic chemo-dynamical formation and evolution models. LÄS MER

  4. 4. High energy gamma ray emission and multi-wavelength view of the AGN PKS 0537-441

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)Linnéuniversitetet/Institutionen för datavetenskap (DV)

    Författare :Emma Fransson; [2017]
    Nyckelord :astrophysics; AGN; PKS 0537-441; jet; accretion; synchrotron self compton; spectral energy distribution;

    Sammanfattning : This thesis describes the analysis of Very High Energy (VHE) emission from the Active Galactic Nucleus PKS 0537-441. It also aims to put the results in a wider context by implementing previous work done on this source. The data chosen for the analysis is provided by the Fermi-LAT satellite and covers the energy range between 300 MeV and 300 GeV. LÄS MER

  5. 5. The Channeling Effect in Ultra-Thin dE-E Monolithic Silicon Telescopes

    Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Kärnfysik

    Författare :Fredrik Parnefjord Gustafsson; [2017]
    Nyckelord :dead-layer; Channelling; The Channeling effect; Plasma effect; Nucleosynthesis; Astrophysics; Ultra-thin silicon detectors; Inhomogenous Big Bang; MST; deadlayer; Pelletron; 8Li; cross-section; Kikuchi pattern; Physics and Astronomy;

    Sammanfattning : A new method has been proposed to study the low energy resonances of 8Li(alpha,n)11B at Ecm ≅ 0.5 MeV using dE-E Monolithic Silicon Telescopes (MSTs). Each telescope consists of five ultra-thin ∼1 µm (dE) silicon detector pads on a ∼500 µm (E) silicon detector. LÄS MER


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