Sökning: "galaxies"

Visar resultat 11 - 15 av 84 uppsatser innehållade ordet galaxies.

1. 11. Finding stars that are likely to be from accreted satellite galaxies

   Kandidat-uppsats, Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

   Författare :Helena Cronstedt; [2023]
   Nyckelord :galaxy mergers; merger debris; velocity space; Physics and Astronomy;

   Sammanfattning : The Milky Way galaxy has through its lifetime merged with several smaller galaxies in its surroundings. Merger events like these play an important role in the formation of galaxies and are therefore of great interest to better our understanding of galaxy formation. LÄS MER

3. 12. Searching for direct collapse black holes using the James Webb Space Telescope

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

   Författare :Edison Arellano Almeida; [2022]
   Nyckelord :extragalactic astronomy;

   Sammanfattning : Recent detections of massive quasars at z > 6 has proven to be an interesting challengefor cosmology given the short time frame that these objects have to reach a certainmass via conventional methods (e.g., galaxy mergers). LÄS MER

4. 13. Starbursts at Cosmic Dawn : Formation of Globular Clusters, Ultra-Faint Dwarfs, and Population III star clusters at z > 6

   Master-uppsats, Stockholms universitet/Institutionen för astronomi

   Författare :Olof Nebrin; [2022]
   Nyckelord :Cosmology; Galaxy Formation; Globular Clusters; First Stars; Dark Matter; Cosmic Dawn; Reionization; Ultra-Faint Dwarfs;

   Sammanfattning : In the standard model of cosmology (ΛCDM) the first stars, star clusters, and galaxies are expected to have formed in short bursts of star formation in low-mass dark matter halos at high redshifts (). Up to this point, attempts to predict the properties and abundances of these luminous objects have made use of numerically expensive cosmological simulations. LÄS MER

5. 14. 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

7. 15. Planes of satellite galaxies

   Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

   Författare :Jessica Laura Erika Kocher; [2022]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : The Planes of Satellites Problem is an open question within the field of galaxy formation. It is based on the observations that the Milky Way's satellites, as well as those around the Andromeda (M31) galaxy, align in planes. LÄS MER