Sökning: "massive stars"

Visar resultat 11 - 15 av 44 uppsatser innehållade orden massive stars.

  1. 11. Colliding Galaxies in a (Nut)Shell

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Fysiska institutionen

    Författare :Jonathan Petersson; [2022]
    Nyckelord :shell galaxies; simulations; starbursts; quenching; mergers; Physics and Astronomy;

    Sammanfattning : Galaxy interactions and mergers are natural recurring events in the current cosmological paradigm, events that often coincide with starbursts and enhanced star formation activity. To understand why that is, one can use idealised (non-cosmological) merger simulations, which provide freedom to recreate specific tidally distorted galaxies, and analysis of the time evolution and underlying physics of the star formation activity at a high spatial resolution. LÄS MER

  3. 12. The Metallicity Structure of the Milky Way Halo II : Characterising the distant halo substructure

    Master-uppsats, Uppsala universitet/Observationell astrofysik

    Författare :Amanda Byström; [2022]
    Nyckelord :Milky Way; Galactic archaeology; halo; photometric metallicities; stellar catalogue; Gaia-Enceladus-Sausage; Sagittarius; Pristine survey; metallicity; Gaia mission;

    Sammanfattning : The Milky Way galaxy, like all spiral galaxies, is surrounded by a roughly spherical distribution of stars called the halo. The halo was largely formed when the galaxy merged with smaller galaxies. LÄS MER

  4. 13. Estimating Properties of a Young Pulsar through X-ray Observations - An Investigation of Parameter Dependence

    Kandidat-uppsats, KTH/Fysik

    Författare :Lurin Ali; [2022]
    Nyckelord :Pulsar; Neutron star; Supernova;

    Sammanfattning : Studying the properties of newborn neutron stars is a complicated matter since they cannot be directly observed. Neutron stars are born when some massive stars go supernova (SN), where the expelled material from the explosion goes on to shield the young neutron star from our view by absorbing its radiation. LÄS MER

  5. 14. Blue Stragglers from Primordial Binary Evolution

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Emilie Desrochers Karlsson; [2022]
    Nyckelord :blue stragglers; binary; stars; binary evolution; mass transfer; Physics and Astronomy;

    Sammanfattning : Blue stragglers were first discovered as hotter and more luminous than the turnoff in the globular cluster M3. Their presence is typically explained by the interplay between stellar collisions and mass transfer in binary systems. In this thesis, I study blue stragglers produced from primordial binary evolution. LÄS MER

  7. 15. Gravitational Waves in Bimetric Gravity

    Master-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Erik Schildt; [2022]
    Nyckelord :;

    Sammanfattning : Understanding the cause of the accelerated expansion of the Universe is one of the most pressing issues in modern cosmology. An alternative to the LambdaCDM-model is bimetric gravity which is an extension of Einstein's theory of general relativity. LÄS MER