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(Doctoral thesis / Doktoravhandling, 2014)
De siste par tiårene har avanserte forskningssatellitter og rombaserte observatorier gitt oss innsikt i en svært dynamisk solatmosfære, hvor lokale variable som temperatur og tetthet endres på korte tidsskalaer. Disse ...
(Master thesis / Masteroppgave, 2015)
In this thesis we have implemented a basic radiative transfer code to model the radial Lyα scattering rate around the epoch when the first stars and galaxies start forming, and ionizing their surroundings. The model, builds ...
(Master thesis / Masteroppgave, 2014)
Neutrinos are very weakly interacting particles with a low mass. In fact, the mass of the neutrinos has not yet been determined by experiments or observations. Still, neutrinos are a good candidate for some of the dark ...
(Master thesis / Masteroppgave, 2014)
In this thesis chromospheric features called Penumbral Microjets (PMJs) are investigated in a sunspot. Observations of high resolution in space, time and wavelength from the Swedish 1-meter Solar Telescope (SST) are used ...
(Master thesis / Masteroppgave, 2014)
In this thesis we investigate a dynamical cosmological constant called the quintessence. Quintessence is a scalar field varying in both space and time following a chosen potential. To explain the coincidence problem, e.g. ...
(Master thesis / Masteroppgave, 2014)
Studier av vekselvirkningsmodeller for baryonsk materie, mørk materie og mørk energi. Hovedfokus på stabilitet for universmodeller, sammenligning med observasjonelle data og konsekvenser for strukturformasjoner.
Degeneracies between Modified Gravity and Baryonic Physics Restricted Access
(Master thesis / Masteroppgave, 2017)
In order to determine the observable signatures of modified gravity theories, it is important to consider the effect of baryonic physics. We use a modified version of the ISIS code to run cosmological hydrodynamic simulations ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Maps of cosmic microwave background (CMB) temperature and polarization from the 2015 release of Planck data provide the highestquality full-sky view of the surface of last scattering available to date. This enables us to ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
We test the statistical isotropy and Gaussianity of the cosmic microwave background (CMB) anisotropies using observations made by the Planck satellite. Our results are based mainly on the full Planck mission for temperature, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
We present the Planck Catalogue of Galactic Cold Clumps (PGCC), an all-sky catalogue of Galactic cold clump candidates detected by Planck. This catalogue is the full version of the Early Cold Core (ECC) catalogue, which ...