The R^sub h^ = ct universe and quintessence

Over the last few years the Rh = ct universe has received a lot of attention, particularly when observational evidence seems to favour this over the standard ... cold dark matter (...CDM) universe. Like the ...CDM, the Rh = ct universe is based on a Friedmann-Robertson-Walker (FRW) cosmology where t...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2016-03, Vol.457 (1), p.212
Main Author: Sultana, J
Format: Article
Language:English
Subjects:
Cosmology
Dark matter
Star & galaxy formation
Universe
Online Access:Get full text
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Summary:Over the last few years the Rh = ct universe has received a lot of attention, particularly when observational evidence seems to favour this over the standard ... cold dark matter (...CDM) universe. Like the ...CDM, the Rh = ct universe is based on a Friedmann-Robertson-Walker (FRW) cosmology where the total energy density p and pressure p of the cosmic fluid contain a dark energy component besides the usual (dark and baryonic) matter and radiation components. However, unlike the ...CDM this model has the simple equation of state p + 3p = 0, i.e. its total active gravitational mass vanishes, which would therefore exclude a cosmological constant as the source of its dark energy component. Faced with this issue, in this paper, we examine various possible sources for the dark energy component of the Rh = ct universe and show that quintessence which has been used in other various dynamical dark energy models could also be a possible source in this case. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0035-8711
1365-2966