Blar i ODA Open Digital Archive på forfatter "Elgarøy, Øystein"
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Gravitational Entropy and Inflation
Elgarøy, Øystein; Grøn, Øyvind (Entropy;15 (9), Journal article; Peer reviewed, 2013-09-04)The main topic of this paper is a description of the generation of entropy at the end of the inflationary era. As a generalization of the present standard model of the Universe dominated by pressureless dust and a Lorentz ... -
A physical interpretation of Hubble’s law and the cosmological redshift from the perspective of a static observer
Bræck, Simen; Elgarøy, Øystein (General Relativity and Gravitation;44 (10), Journal article; Peer reviewed, 2012-07-18)We derive explicit and exact expressions for the physical velocity of a free particle comoving with the Hubble flow as measured by a static observer, and for the frequency shift of light emitted by a comoving source and ...