Sökning: "supernovor"
Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet supernovor.
1. Supernovae and clusters of galaxies as probes for the high redshift universe
Sammanfattning : .... LÄS MER
2. Spectral modeling of nebular-phase supernovae
Sammanfattning : Massive stars live fast and die young. They shine furiously for a few million years, during which time they synthesize most of the heavy elements in the universe in their cores. They end by blowing themselves up in a powerful explosion known as a supernova (SN). LÄS MER
3. Supernovae seen through gravitational telescopes
Sammanfattning : Galaxies, and clusters of galaxies, can act as gravitational lenses and magnify the light of objects behind them. The effect enables observations of very distant supernovae, that otherwise would be too faint to be detected by existing telescopes, and allows studies of the frequency and properties of these rare phenomena when the universe was young. LÄS MER
4. The cosmic origin of fluorine and sulphur: Infrared spectroscopic studies of red giants
Sammanfattning : Disregarding the small primordial traces of the lightest elements, all metals have been formed in stellar processes, which means that the relative amount of metals in the Universe increases for every stellar generation. This build-up of elements is called chemical evolution and might be used both to constrain stellar models as well as understanding the formation and evolution of stellar populations. LÄS MER
5. Spectral Analysis of Neutron Capture Elements in the Laboratory and Stars
Sammanfattning : The pedigree of the elements heavier than iron is a vital question in the history and evolution of our galaxy. The elements up to and including those of the iron group are produced mainly through fusion processes within stars, giving the stars their energy. LÄS MER