Change search
ReferencesLink to record
Permanent link

Direct link
Generating Spatial Curvature in an Inhomogeneous Universe: A Bottom-up Approach to Cosmology
Stockholm University, Faculty of Science, Department of Physics. International Center for Relativistic Astrophysics Network (ICRANet), Italy.
2010 (English)In: Journal of the Korean Physical Society, ISSN 0374-4884, Vol. 57, no 3, 586-590 p.Article in journal (Refereed) Published
Abstract [en]

We take the first steps towards a new bottom-up approach to cosmology. The dynamics is described in terms of the world lines of the cosmic grains (galaxies or clusters of galaxies). The description is microscopic in the sense that there is no fluid assumption. The motion of each grain is geodesic ensuring the presence of gravitational interactions only. The scheme is fully general in that there is no restriction to homogeneous or isotropic models. Our approach is mathematically similar to Buchert's averaging method, but there are important differences. In particular, we use statistical averages, when needed, not volume averages. For example, a crucial ingredient in any cosmological framework is the spatial curvature. Here we give an estimate of the scalar curvature based on statistical averages of the actual mass distribution in the universe.

Place, publisher, year, edition, pages
2010. Vol. 57, no 3, 586-590 p.
Keyword [en]
Cosmology, General relativity
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-66228DOI: 10.3938/jkps.57.586ISI: 000281925100009OAI: diva2:467633

authorCount :2

Available from: 2011-12-19 Created: 2011-12-19 Last updated: 2015-07-29Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Rosquist, Kjell
By organisation
Department of Physics
In the same journal
Journal of the Korean Physical Society
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 21 hits
ReferencesLink to record
Permanent link

Direct link