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Now showing items 31-40 of 565
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
We study the mean absorption spectrum of the Damped Lyα (DLA) population at z ~ 2.6 by stacking normalized, rest-frame-shifted spectra of ~27,000 DLA systems from the DR12 of the Baryon Oscillation Spectroscopic Survey ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The primordial deuterium abundance probes fundamental physics during the big bang nucleosynthesis and can be used to infer cosmological parameters. Observationally, the abundance can be measured using absorbing clouds along ...
(Master thesis / Masteroppgave, 2015)
In 2013 a new metric called TARDIS was introduced. This metric was published by Tippet and Tsang, and described a time machine. This thesis uses numerical methods to explore properties of this new metric. We start by ...
(Master thesis / Masteroppgave, 2015)
The ΛCDM model used in modern cosmology has major theoretical problems. To attempt to solve these many modified gravity theories have been proposed. We calculate velocity statistics (streaming pair-wise velocities and the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
We present unpublished observations of Comet Donati 1858 V recently recovered in an old storage facility at the University Observatory in Oslo. Carefully-made drawings reveal temporal changes in the appearance of this ...
(Master thesis / Masteroppgave, 2015)
In this thesis, we investigate statistical properties of the redshift zero matter distribution in disformal gravity through N-body simulations. The disformal model studied here is a conformally coupled field in a symmetron ...
(Master thesis / Masteroppgave, 2015)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Planck has mapped the intensity and polarization of the sky at microwave frequencies with unprecedented sensitivity. We use these data to characterize the frequency dependence of dust emission. We make use of the Planck ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
This paper presents an overview of the polarized sky as seen by Planck HFI at 353 GHz, which is the most sensitive Planck channel for dust polarization. We construct and analyse maps of dust polarization fraction and ...