2014
DOI: 10.1017/pasa.2014.9
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Constraining a Possible Variation of G with Type Ia Supernovae

Abstract: Astrophysical cosmology constrains the variation of Newton's Constant in a manner complementary to laboratory experiments, such as the celebrated lunar laser ranging campaign. Supernova cosmology is an example of the former and has attained campaign status, following planning by a Dark Energy Task Force in 2005. In this paper, we employ the full SNIa data set to the end of 2013 to set a limit on G variation. In our approach, we adopt the standard candle delineation of the redshift distance relation. We set an … Show more

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Cited by 39 publications
(38 citation statements)
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“…The dependence of the absolute magnitude on the two parameters can be estimated using an entire sample of SNe Ia simultaneously, not just lowredshift SNe Ia whose distances can be computed from other methods. Any remaining dispersion in the absolute magnitudes of a sample after this stretch-color standardisation could be used in combination with our model to constrain the variation of G more accurately than has been done in previous works [23][24][25].…”
Section: A Gravitational Effect On Wlr and Standardisabilitymentioning
confidence: 99%
See 1 more Smart Citation
“…The dependence of the absolute magnitude on the two parameters can be estimated using an entire sample of SNe Ia simultaneously, not just lowredshift SNe Ia whose distances can be computed from other methods. Any remaining dispersion in the absolute magnitudes of a sample after this stretch-color standardisation could be used in combination with our model to constrain the variation of G more accurately than has been done in previous works [23][24][25].…”
Section: A Gravitational Effect On Wlr and Standardisabilitymentioning
confidence: 99%
“…However, these initial studies assumed a straightforward proportionality between L and G, and either did not attempt to produce light curves [20,21], or if they did produce light curves [22] did not attempt to reproduce the WLR or quantitatively verify that the standardisation procedures still work when G = G 0 , where G 0 is the value of G at the present day. This method has also been utilised to place constraints on the variation of G using the observational dispersion in SNe Ia absolute magnitudes [23][24][25].…”
mentioning
confidence: 99%
“…Contrary to what one could think ext G is not necessarily equal, within the proposed model, to the quantity 3 2 2 P P P l m c t (with the Planck's unites given by the commonly accepted values) since the values of Planck's units themselves is derived by previously assuming a value for G (measured at Earth's surface or deduced by astronomical observation [15]) in the presence of other massive bodies. Furthermore we should also consider the contributions to ZPF, and then its Dependence on the Distance from Mass eventually on G , coming from strong and weak interactions, at this stage not still included in our model of the function describing ( ) G r (and not considered in the Haisch, Rueda and Puthoff model of inertia as well [6]).…”
Section: Discussionmentioning
confidence: 74%
“…Indeed, the present modes arise precisely from would-be massive spin 2 modes, albeit the details are different. A time dependence ∼ a(t) −1 of the Newton constant seems to be somewhat large in view of recent estimates [38,39]. However, we have not properly taken into account the coupling to matter, and the underlying FLRW cosmology is non-standard.…”
Section: Scalar Modes a (−) [D + Dφ] And The Schwarzschild Metricmentioning
confidence: 93%