On a critical radiation density in the Friedmann equation
- The paper presents a classification of the basic types of admissible solutions of the general Friedmann equation with non-vanishing cosmological constant and for the case that radiation and matter do not couple. There are four distinct types. The classification uses first the discriminant of a polynomial of the third degree, closely related to the right hand side of the Friedmann equation. The decisive term is then a critical radiation density which can be calculated explicitly.
Author details: | Hellmut Baumgärtel |
---|---|
DOI: | https://doi.org/10.1063/1.4771668 |
ISSN: | 0022-2488 |
Title of parent work (English): | Journal of mathematical physics |
Publisher: | American Institute of Physics |
Place of publishing: | Melville |
Publication type: | Article |
Language: | English |
Year of first publication: | 2012 |
Publication year: | 2012 |
Release date: | 2017/03/26 |
Volume: | 53 |
Issue: | 12 |
Number of pages: | 9 |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Mathematik |
Peer review: | Referiert |