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    On recent claims concerning the Rh = ct Universe

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    Author
    Melia, F.
    Affiliation
    The University of Arizona
    Issue Date
    2014-11-18
    
    Metadata
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    Publisher
    OXFORD UNIV PRESS
    Citation
    On recent claims concerning the Rh = ct Universe 2014, 446 (2):1191 Monthly Notices of the Royal Astronomical Society
    Journal
    Monthly Notices of the Royal Astronomical Society
    Rights
    © 2014 The Author. Published by Oxford University Press on behalf of the Royal Astronomical Society.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    The $R_{\rm h}=ct$ Universe is a Friedmann-Robertson-Walker (FRW) cosmology which, like $\Lambda$CDM, assumes the presence of dark energy in addition to (baryonic and non-luminous) matter and radiation. Unlike $\Lambda$CDM, however, it is also constrained by the equation of state (EOS) $p=-\rho/3$, in terms of the total pressure $p$ and energy density $\rho$. One-on-one comparative tests between $R_{\rm h}=ct$ and $\Lambda$CDM have been carried out using over 14 different cosmological measurements and observations. In every case, the data have favoured $R_{\rm h}=ct$ over the standard model, with model selection tools yielding a likelihood $\sim$$90- 95\%$ that the former is correct, versus only $\sim$$5-10\%$ for the latter. In other words, the standard model without the EOS $p=-\rho/3$ does not appear to be the optimal description of nature. Yet in spite of these successes---or perhaps because of them---several concerns have been published recently regarding the fundamental basis of the theory itself. The latest paper on this subject even claims---quite remarkably---that $R_{\rm h}=ct$ is a vacuum solution, though quite evidently $\rho\not=0$. Here, we address these concerns and demonstrate that all criticisms leveled {\it thus far} against $R_{\rm h}=ct$, including the supposed vacuum condition, are unwarranted. They all appear to be based on incorrect assumptions or basic theoretical errors. Nevertheless, continued scrutiny such as this will be critical to establishing $R_{\rm h}=ct$ as the correct description of nature.
    ISSN
    0035-8711
    1365-2966
    DOI
    10.1093/mnras/stu2181
    Version
    Final accepted manuscript
    Additional Links
    http://mnras.oxfordjournals.org/cgi/doi/10.1093/mnras/stu2181
    ae974a485f413a2113503eed53cd6c53
    10.1093/mnras/stu2181
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