Cosmic anti-friction and accelerated expansion

Simple item page
dc.creatorZimdahl, Winfried
dc.creatorSchwarz, Dominik J.
dc.creatorBalakin, Alexander B.
dc.creatorPavon, Diego
dc.date2000-09-21
dc.date2001-06-06
dc.date.accessioned2026-07-07T10:31:02Z
dc.date.available2026-07-07T10:31:02Z
dc.descriptionWe explain an accelerated expansion of the present universe, suggested from observations of supernovae of type Ia at high redshift, by introducing an anti-frictional force that is self-consistently exerted on the particles of the cosmic substratum. Cosmic anti-friction, which is intimately related to ``particle production'', is shown to give rise to an effective negative pressure of the cosmic medium. While other explanations for an accelerated expansion (cosmological constant, quintessence) introduce a component of dark energy besides ``standard'' cold dark matter (CDM) we resort to a phenomenological one-component model of CDM with internal self-interactions. We demonstrate how the dynamics of the LambdaCDM model may be recovered as a special case of cosmic anti-friction. We discuss the connection with two-component models and obtain an attractor behavior for the ratio of the energy densities of both components which provides a possible phenomenological solution to the coincidence problem.
dc.description19 pages, 7 (3 new) figures, new derivation of kinetic equation with force term, accepted by Physical Review D
dc.identifierhttps://arxiv.org/abs/astro-ph/0009353
dc.identifierhttp://arxiv.org/abs/astro-ph/0009353
dc.identifierPhys.Rev.D64:063501,2001
dc.identifierdoi:10.1103/PhysRevd.64.063501
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/178280
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleCosmic anti-friction and accelerated expansion
dc.typetext

Files

Collections

arXiv