Sökning: "massive stars"

Visar resultat 1 - 5 av 13 uppsatser innehållade orden massive stars.

  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. Investigating super-Eddington accretion flows in Ultraluminous X-ray sources

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Andrés Gúrpide Lasheras; [2018]
    Nyckelord :Accretion; X-ray binaries; Black holes; Neutron Stars; Ultraluminous X-ray sources;

    Sammanfattning : It is now widely known that most of the large galaxies we observe (e.g. the Milky Way) host in their center a supermassive black hole ($10^{6}-10^{9}$ $M_\odot$). LÄS MER

  3. 3. Derivation and stability determination of black hole metrics

    Kandidat-uppsats, Lunds universitet/Teoretisk partikelfysik; Lunds universitet/Institutionen för astronomi och teoretisk fysik

    Författare :Emma Svensson; [2018]
    Nyckelord :black holes; relativity; general relativity; kerr metric; schwarzschild metric; derivation; stability; Physics and Astronomy;

    Sammanfattning : The Schwarzschild metric and the Kerr metric describe the gravitational fields around static and rotating black holes, respectively. Here, we derive the Kerr metric in a simpler way than how it was derived originally and determine the stability of the Schwarzschild metric. LÄS MER

  4. 4. Forbidden oxygen in the Milky Way disk

    Kandidat-uppsats, Lunds universitet/Astronomi

    Författare :Asma Sahli; [2017]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : Oxygen is produced inside massive stars and dispersed into the interstellar medium mainly through type II supernovae explosions. This element, which is the third most abundant one in the Universe, plays an important role in tracing the Galactic chemical history and evolution. LÄS MER

  5. 5. 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

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