Sökning: "Galactic structure"
Visar resultat 1 - 5 av 22 avhandlingar innehållade orden Galactic structure.
1. Galactic Structure Revealed by Space Astrometry
Sammanfattning : This work demonstrates how the structure of our Galaxy, the Milky Way, can be unveiled with the use of space astrometry. It consists of two parts, of which the first is a brief introduction to the fields of Galactic structure, covering the Galaxy's stellar constituents, how the Galaxy was formed and how it has evolved over time, both chemically and kinematically. LÄS MER
2. A study of galactic structure in Cassiopeia
Sammanfattning : .... LÄS MER
3. Studies of molecular clouds at the Galactic centre
Sammanfattning : Interstellar molecular clouds play an essential role in the Universe. Such clouds are invoked for the production and destruction of stars, galaxies and gas and also for energy transport in galaxies. LÄS MER
4. The nature of kinematic structures in the Galactic disc
Sammanfattning : The velocity distribution of stars in the Galactic disc is complex and consists of a vast number of kinematic structures, that is, stars that share similar velocity components. The reasons why some stars move together may be different and are related to dynamical processes connected to the Galaxy, both internal as well as external ones, such as resonances with the Galactic bar or the Galactic spiral arm structure, dissolution of open clusters, or merger events with other galaxies. LÄS MER
5. Supernova surroundings on circumstellar and galactic scales
Sammanfattning : Some stars cease to be in a bright and destructive display called a supernova. This thesis explores what we can learn about supernovae (SNe) by studying their immediate surroundings, and what the SNe can teach us about their environments. LÄS MER