Scaling Cosmology
نویسندگان
چکیده
منابع مشابه
Scaling Cosmology
We show that with the help of a suitable coupling between dark energy and cold dark matter it is possible to reproduce any scaling solution ρX ∝ ρMa , where ρX and ρM are the densities of dark energy and dark matter, respectively. We demonstrate how the case ξ = 1 alleviates the coincidence problem. Future observations of supernovae at high redshift as well as quasar pairs which are planned to ...
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Averaged inhomogeneous cosmologies lie at the forefront of interest, since cosmological parameters such as the rate of expansion or the mass density are to be considered as volume–averaged quantities and only these can be compared with observations. For this reason the relevant parameters are intrinsically scale–dependent and one wishes to control this dependence without restricting the cosmolo...
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The theoretical background for the main scaling relations of spiral galaxies is discussed, and compared with the observational datum. The luminosity–linewidth relation (TFR) is the best determined among those; the sources of scatter of each are discussed. The results of applications of the TFR to Cosmology, using several all–sky samples of galaxies, are summarized. They yield estimates of H◦, o...
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A new type of scaling applicable to a variety of physical parameters in the universe is proposed here. This utilizes a relation linking the fundamental masses and fundamental constants in nature and an axiomatic approach is developed for the relations between microscopic and macroscopic found by Eddington and Dirac. In this approach, the fundamental constants are changing with time and the vari...
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ژورنال
عنوان ژورنال: General Relativity and Gravitation
سال: 2003
ISSN: 0001-7701,1572-9532
DOI: 10.1023/a:1022369800053