Bigger Rip with no dark energy

By studying a modified Friedmann equation which arises in an extension of general relativity which accommodates a time-dependent fundamental length L(t), we consider cosmological models where the scale factor diverges with an essential singularity at a finite future time. Such models have no dark en...

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Veröffentlicht in:Astroparticle physics 2004-11, Vol.22 (3-4), p.307-312
Hauptverfasser: Frampton, Paul H., Takahashi, Tomo
Format: Artikel
Sprache:eng
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Zusammenfassung:By studying a modified Friedmann equation which arises in an extension of general relativity which accommodates a time-dependent fundamental length L(t), we consider cosmological models where the scale factor diverges with an essential singularity at a finite future time. Such models have no dark energy in the conventional sense of energy possessing a simple pressure–energy relationship. Data on supernovae restrict the time from the present until the Rip to be longer than the current age of the Universe.
ISSN:0927-6505
1873-2852
DOI:10.1016/j.astropartphys.2004.08.003