Sökning: "Galactic structure"
Visar resultat 6 - 10 av 22 avhandlingar innehållade orden Galactic structure.
6. Dark Matter in the Solar System, Galaxy, and Beyond
Sammanfattning : There is evidence that dark matter constitutes a majority of the Universe's matter content. Yet, we are ignorant about its nature. Understanding dark matter requires new physics, possibly in the form of a new species of fundamental particles. LÄS MER
7. Goulds bälte : en undersökning av dess utsträckning och rörelseförhållanden
Sammanfattning : To investigate the kinematics of the local system of stars and to determine the extent of the Gould belt system, bright nearby early type stars in different age groups have been examined. The mean plane of the stars younger than 20 million years was found to be inclined to the galactic plane by 19°, while the mean plane of the stars older than 60 million years is practically coincident with the galactic plane. LÄS MER
8. Young Star Clusters and Clumps in the Local Universe : The effect of galactic environment on star formation
Sammanfattning : Stars do not form in isolation, but rather out of a hierarchical structure set by the turbulence of the interstellar medium. At the densest peak of the gas distribution, the star formation process can produce young star clusters (YSCs), which are gravitationally bound systems of stars with mass between ~100 and 106 MSun and typical size of few parsecs. LÄS MER
9. Ion dynamics and structure of collisionless shocks in space
Sammanfattning : Shock waves form when supersonic flows encounter an obstacle. Like in regular gases, shock waves can form in a plasma - a gas of electrically charged particles. Shock waves in plasmas where collisions between particles are very rare are referred to as collisionless shock waves. LÄS MER
10. On the emergent structures at cosmic dawn
Sammanfattning : Recent developments have granted us the means necessary for studying the emergence of the very first luminous structures in the Universe. The beckoning of the first generation of stars marks the end of the cosmic dark ages – thus entering into the cosmic dawn. LÄS MER
