Search for dissertations about: "Edvard Mörtsell"

Showing result 1 - 5 of 10 swedish dissertations containing the words Edvard Mörtsell.

  1. 1. Light propagation in the universe

    Author : Edvard Mörtsell; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : .... READ MORE

  2. 2. Inhomogeneous cosmologies with clustered dark energy or a local matter void

    Author : Michael Blomqvist; Edvard Mörtsell; Pedro Ferreira; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; dark energy; type Ia supernova; inhomogeneous; Cosmology; Kosmologi; Astronomy; astronomi;

    Abstract : In the standard model of cosmology, the universe is currently dominated by dark energy in the form of the cosmological constant that drives the expansion to accelerate. While the cosmological constant hypothesis is consistent with all current data, models with dynamical behaviour of dark energy are still allowed by observations. READ MORE

  3. 3. Cosmic tests of massive gravity

    Author : Jonas Enander; Edvard Mörtsell; Stefan Hofmann; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Modified gravity; massive gravity; cosmology; dark energy; dark matter; fysik; Physics;

    Abstract : Massive gravity is an extension of general relativity where the graviton, which mediates gravitational interactions, has a non-vanishing mass. The first steps towards formulating a theory of massive gravity were made by Fierz and Pauli in 1939, but it took another 70 years until a consistent theory of massive gravity was written down. READ MORE

  4. 4. Gravitational collapse in bimetric gravity

    Author : Marcus Högås; Edvard Mörtsell; Tomi Koivisto; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Bimetric gravity; bigravity; modified gravity; gravitational collapse; Bimetrisk gravitation; modifierad gravitation; gravitationskollaps; teoretisk fysik; Theoretical Physics;

    Abstract : Einstein’s theory of general relativity has been the prevailing theory of classical gravity for over a century. Its observational consistency is unparalleled. There are however a few (arguably) serious short-comings. READ MORE

  5. 5. Was Einstein Wrong? : Theoretical and observational constraints on massive gravity

    Author : Marcus Högås; Edvard Mörtsell; David Mota; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Gravity; Massive gravity; Bimetric gravity; Cosmology; Gravitational collapse; Gravitational waves; Observational constraints; Theoretical Physics; teoretisk fysik;

    Abstract : For more than a century, Einstein's theory of general relativity has described gravitational phenomena with astonishing precision. However, for the theory to fit observations we need to add two elusive substances: dark energy and dark matter. Together they add up to 95% of the energy budget of the Universe. READ MORE