Skip to main content

News about Scitation

In December 2016 Scitation will launch with a new design, enhanced navigation and a much improved user experience.

To ensure a smooth transition, from today, we are temporarily stopping new account registration and single article purchases. If you already have an account you can continue to use the site as normal.

For help or more information please visit our FAQs.

banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.
1. P. A. M. Dirac, “ The cosmological constants,” Nature 139, 323323 (1937).
2. C. Brans and R. H. Dicke, “ Mach's principle and a relativistic theory of gravitation,” Phys. Rev. 124(3), 925935 (1961).
3. K. Nordtvedt, “ Equivalence principle for massive bodies. 2. Theory,” Phys. Rev. 169(5), 10171025 (1968).
4. S. G. Turyshev et al., “ 35 years of testing relativistic gravity: Where do we go from here?,” in Astrophysics, Clocks and Fundamental Constants, Lecture Notes in Physics Vol. 648, edited by S. G. Karshenboim ( WE Heraeus Stift, Bad Honnef, 2004), pp. 311330.
5. R. D. Reasenberg, “ The constancy of G and other gravitational experiments,” Philos. Trans. R. Soc. A 310(1512), 227238 (1983).
6. V. M. Kaspi, J. H. Taylor, and M. Ryba, “ High-precision timing of millisecond pulsars. 3: Long-term monitoring of PSRS B1885+09 and B1937+21,” Astrophys. J. 428(2), 713728 (1994).
7. E. Gaztanaga et al., “Bounds on the possible evolution of the gravitational constant from cosmological type-Ia supernovae,” Phys. Rev. D 65(2), 023506-19 (2001).
8. D. B. Guenther, L. M. Krauss, and P. Demarque, “ Testing the constancy of the gravitational constant using helioseismology,” Astrophys. J. 498(2), 871876 (1998).
9. F. S. Accetta, L. M. Krauss, and P. Romanelli, “ New limits on the variability of G from big-bang nucleosynthesis,” Phys. Lett. B 248(1–2), 146150 (1990).
10. Y. Lau, “ The large number hypothesis and Einstein's theory of gravitation,” Aust. J. Phys. 38(4), 547553 (1985).
11. J. P. Uzan, “ Varying constants, gravitation and cosmology,” Living Rev. Relativ. 14(2), 1155 (2011); <>.
12. M. Reuter and H. Weyer, “Running Newton constant, improved gravitational actions, and galaxy rotation curves,” Phys. Rev. D 70(12), 124028-128 (2004).
13. S. Ray et al., “ Dark energy models with a time-dependent gravitational constant,” Int. J. Mod. Phys. D 16(11), 17911802 (2007).
14. J. Ponce de Leon, “ Cosmological model with variable equations of state for matter and dark energy,” Class. Quantum Grav. 29(13), 135009-131 (2012).
15. K. Freese et al., “ Cosmology with decaying vacuum energy,” Nucl. Phys. B 287(4), 797814 (1987).
16. B. G. Sidharth, “ Tests for varying G,” Found. Phys. Lett. 19(6), 611617 (2006).
17. J. A. Belinchón and I. Chakrabarty, “ Perfect fluid cosmological models with time-varying constants,” Int. J. Mod. Phys. D 12(6), 11131129 (2003).
18. V. Faraoni, Cosmology in Scalar-Tensor Gravity ( Kluwer, The Netherlands, 2004), pp. 8–12.
19. M. Endō and T. Fukui, “ The cosmological term and a modified Brans-Dicke cosmology,” Gen. Relativ. Grav. 8(10), 833839 (1977).
20. E. Garcia-Berro et al., “ The variation of the gravitational constant inferred from the Hubble diagram of type Ia supernovae,” Int. J. Mod. Phys. D 15(8), 11631173 (2006).
21. J. D. Barrow and P. Parsons, “ Behaviour of cosmological models with varying G,” Phys. Rev. D 55(4), 19061936 (1997).
22. J. D. Barrow and J. Magueijo, “ Solving the quasi-flatness problems in Brans-Dickie cosmologies with a varying light speed,” Class. Quantum Grav. 16(4), 14351454 (1999).
23. R. Dungan and H. B. Prosper, “ Varying-G cosmology and type Ia supernovae,” Am. J. Phys. 79(1), 5762 (2011).
24. M. Kowalski et al., “ Improved cosmological constraints from new, old, and combined supernova data sets,” Astrophys. J. 686(2), 749778 (2008).
25. H. Štefančić, “ Partial rip scenario—a cosmology with a growing cosmological term,” Phys. Lett. B 595(1-4), 915 (2004).

Data & Media loading...


Article metrics loading...



In a recent paper, Dungan and Prosper claim that the Type Ia supernovae data alone are not enough to distinguish between the standard ΛCDM model and other models with varying . To substantiate this, they present two spatially flat variable FRW models with Λ = 0 that fit well the Type Ia supernova data. In these models they assumed that the energy momentum tensor of the matter distribution is conserved. We show that this assumption is inconsistent with variable cosmology when Λ is assumed to be constant, thus rendering the suggested models erroneous.


Full text loading...


Access Key

  • FFree Content
  • OAOpen Access Content
  • SSubscribed Content
  • TFree Trial Content
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd