Sökning: "Stjärnorna"
Visar resultat 1 - 5 av 85 uppsatser innehållade ordet Stjärnorna.
1. Potassium in the Galactic Bulge - as traced by microlensed dwarf & sub-giant stars
Kandidat-uppsats, Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionenSammanfattning : During this report the potassium (K) trend in the Galactic Bulge, with respect to metallicity and various α-elements, has been computed and evaluated by a method of line synthesis on the 7698.96 ̊A KI line (7699 KI), where Non-Local-Thermal-Equilibrium (NLTE) effects have been considered. LÄS MER
2. What limits the luminosity of red supergiants?
Kandidat-uppsats, Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionenSammanfattning : The observed upper limit of the luminosity of red supergiants, often called the Humphreys-Davidson limit, has recently been shown to be independent of metallicity and to not be explainable by single star evolution – findings that both contradict established ideas of the origins of the limit. It is now known that the vast majority of stars with sufficient mass to possibly evolve into red supergiants above the limit interact with companion stars at some point during their lives. LÄS MER
3. Skrivet i stjärnorna : En undersökning av medicinskt innehåll i svenska almanackor mellan 1608-1731
Master-uppsats, Stockholms universitet/Historiska institutionenSammanfattning : This thesis examines the medical content of Early Modern Swedish almanacs between the years 1608-1731. The aim of the study is to uncover the understanding of health, illness and the human body that is prevalent within the almanacs. This has been found to be strongly related to the medical paradigm of humorism, or Galenic Medicine. LÄS MER
4. Void Evolution and Cosmic Star Formation
Kandidat-uppsats, Uppsala universitet/Institutionen för fysik och astronomiSammanfattning : The rate at which stars have formed throughout the history of theuniverse is not constant, it started out slow, increased until around redshift ∼ 2 when it reversed and became slower again. The reason for this behaviour is still being investigated with various models and simulations usually based upon dark matter halos. LÄS MER
5. Hyper-velocity stars from globular clusters hosting intermediate-mass black holes
Kandidat-uppsats, Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionenSammanfattning : In 1988 Hills proposed that stars can gain velocities above 500 km s−1 if they are in a stellar binary which gets disrupted by a super massive black hole (SMBH). One of the stars would get trapped in an elliptical orbit around the SMBH while the other gets ejected and obtains a relatively high velocity. LÄS MER