Cosmic equilibrium of a photon gas in its gravitational field
2008 (English)In: Advanced Studies in Theoretical Physics, Vol. 2, no 17, 837-843 p.Article in journal (Refereed) Published
Recent research indicates that the universe is expanding at an accelerated rate, and that dark energy and dark matter are underlying such a behaviour. In this paper the proposal is made that dark energy and matter are due to the zero point energy of a photon gas and its related Casimir force. For cosmical dimensions an equilibrium is shown to exist within such a gas, in the form of a balance between its pressure and gravitational forces. With commonly accepted values of the parameters involved, there is further an indication that the universe should be somewhat off such an equilibrium, and be governed by a pressure-dominated accelerated state. The obtained numerical results depend critically on the effective spectral contribution to the zero point pressure. Expansion at a constant rate is only possible at special conditions. This analysis can also be modified to apply to the hot photon gas prevailing during the earliest stages of the expansion, thereby leading to a strongly reduced characteristic radius within the parameter range of an equilibrium.
Place, publisher, year, edition, pages
2008. Vol. 2, no 17, 837-843 p.
Accelerated expansion, Casimir force, Cosmological constant, Dark energy and matter, Planck length, Universe
Astronomy, Astrophysics and Cosmology
IdentifiersURN: urn:nbn:se:kth:diva-154162ScopusID: 2-s2.0-59849103393OAI: oai:DiVA.org:kth-154162DiVA: diva2:756210
QC 201410162014-10-162014-10-142014-10-16Bibliographically approved