Global ETD Search
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Showing 1 to 3 of 3 for “"tähtitiede"”.
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Spot activity of late-type stars : a study of II Pegasi and DI Piscium
All stars that have outer convection zones show magnetic activity. This activity strengthens with angular velocity and depth of the convection zone. Cool starspots are believed to be caused by local magnetic field concentrations on the surfaces of stars. They show up as dark regions against a …
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Variability of young solar-type stars : Spot cycles, rotation, and active longitudes
The outer convective envelopes of late-type stars are believed to support turbulent dynamos that are able to generate strong and dynamic magnetic fields. When these magnetic fields penetrate the stellar surface, they give rise to directly observable activity phenomena, such as dark spots and line …
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Svarta Hål i Fysikens Historia
Denna avhandling utforskar historien av svarta hål inom fysik genom att spåra utvecklingen av upptäckter, begrepp och modeller från och med Newtons Principia till och med observationerna nyligen gjorda vid LIGO (Laser Interferometer Gravitational-Wave Observatory). Arbetet är skrivet på en teknisk …