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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Analytical models are presented for currents along vertical magnetic field lines due to slow bulk electron motion in plasmas subject to a gravitational force. It is demonstrated that a general feature of this problem is a ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
This is a post-peer-review, pre-copyedit version of an article published in Solar Physics. The final authenticated version is available online at: http://dx.doi.org/10.1007/s11207-017-1095-2
(Master thesis / Masteroppgave, 2016)
The universe is full of stuff we cannot see, neither directly or indirectly. We do not understand the nature of the mysterious dark matter and how it interacts with normal matter. Big Bang Nucleosynthesis (BBN) provides ...
(Doctoral thesis / Doktoravhandling, 2022)
In the standard model of the universe, the presence of a cold and dark form of matter is essential for explaining a wide range of observables, from the very largest scales such as the microwave background radiation, to ...
(Master thesis / Masteroppgave, 2012)
The Q/U-Imaging ExperimenT (QUIET) is a ground-based coherent polarimeter experiment, primarily targeting the detection of low-l B-mode polarization in the CMB. Such modes are a signature of primordial tensor perturbations, ...
(Master thesis / Hovedoppgave, 2002)
Five years (1992-1997, ~2650 images) of optical observations of the
gravitational lens system QSO 0957+561 were analyzed using a new
photometry package developed by Jan Teuber and me. My supervisor was
Prof. Rolf Stabell, ...
(Master thesis / Masteroppgave, 2010)
The solar chromosphere is a region where the thermodynamics are out of equilibrium, and realistic values of temperature and electron densities here are difficult to obtain. Hydrogen, being the most abundant element in solar ...
(Master thesis / Masteroppgave, 2008)
In-situ observations together with spectroscopic measurements show that the elemental abundance in the solar atmosphere varies from the photosphere to solar wind.
An enrichment for low First Ionisation Potential elements ...
(Master thesis / Masteroppgave, 2008)
The solar chromosphere has previously been thought to be a homogenic layer of the solar atmosphere, but better observations have made it evident that the chromosphere is a highly dynamic area.
Spicules are structures ...
(Master thesis / Masteroppgave, 2012)
The solar corona has a temperature of order 1 MK, which is almost 200 times the temperature of the underlying surface. This fact has puzzled solar physicists for more than six decades. As of today, most solar physicists ...