Branes: cosmological surprise and observational deception

Fay, Stéphane

doi:10.1051/0004-6361:20054154

Cited by 8 publications

(16 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such a value is consistent with those found in the literature, i.e., Ω λ = 0.026 which was obtained from a different approach (see Keresztes et al 2007), assuming 4Ω λ Ω Λ = Ω 2 m , and also to the values obtained from statistical analysis which resulted in Ω λ = 0.04 (see, e.g., Dabrowski et al 2004) and Ω λ = 0.02 (Fay 2006). Furthermore, with the high number of sources per year obtained for the GW detector, we obtain a great statistics.…”

Section: Discussionsupporting

confidence: 91%

Constraining the brane tension in Randall-Sundrum cosmology through gravitational waves from binary neutron stars

Moraes

Miranda

2014

Astrophys Space Sci

View full text Add to dashboard Cite

When describing our world as a brane embedded in a higher dimensional hypersurface (or bulk) we are led to consider the existence of some new parameters related to the extra dimension or to the brane itself, as the brane tension density parameter Ω λ . We show that gravitational waves emitted by binary neutron stars can constrain the values that Ω λ might assume. Our approach is applied to the perspectives of Einstein Telescope gravitational wave detector and results in Ω λ ≤ 0.037, which is in agreement with other estimates obtained from different methods in the literature.

show abstract

Section: Discussionsupporting

confidence: 91%

Constraining the brane tension in Randall-Sundrum cosmology through gravitational waves from binary neutron stars

Moraes

Miranda

2014

Astrophys Space Sci

View full text Add to dashboard Cite

show abstract

“…In addition to their simplicity, one of the main reasons for their popularity has been the fact that an effective model of this type can mimic a very wide variety of models, ranging from the cosmological constant with EOS equal to ÿ1 to models with variable EOS such as quintessence models and brane inspired models such as that due to Dvali-Gabadadze-Porrati [7,8].…”

Section: Introductionmentioning

confidence: 99%

Model-independent dark energy reconstruction scheme using the geometrical form of the luminosity-distance relation

Fay¹,

Tavakol²

2006

Phys. Rev. D

View full text Add to dashboard Cite

We put forward a new model-independent reconstruction scheme for dark energy which utilizes the expected geometrical features of the luminosity-distance relation. The important advantage of this scheme is that it does not assume explicit ansatzes for cosmological parameters but only some very general cosmological properties via the geometrical features of the reconstructed luminosity-distance relation. Using the recently released supernovae data by the Supernova Legacy Survey together with a phase space representation, we show that the reconstructed luminosity-distance curves best fitting the data correspond to a slightly varying dark energy density with the Universe expanding slightly slower than the CDM model. However, the CDM model fits the data at 1 significance level and the fact that our best fitting luminosity-distance curve is lower than that of the corresponding CDM model could be due to systematics. The transition from an accelerating to a decelerating expansion occurs at a redshift larger than z 0:35. Interpreting the dark energy as a minimally coupled scalar field we also reconstruct the scalar field and its potential. We constrain m 0 using the baryon acoustic oscillation peak in the SDSS luminous red galaxy sample and find that the best fit is obtained with m 0 0:27, in agreement with the CMB data.

show abstract

“…Generally, numerical values of cosmological parameters depend on a model in which the experimental data were processed. Recently fits of parameters were made in RSII-like models with positive tension of the brane [21,22,23,24]. The main cosmological parameters obtained in these fits do not considerably differ from those of the standard model used in the present note.…”

Section: Model With Negative Tension Of the Branementioning

confidence: 68%

Constraints on Parameters of Models With Extra Dimension From Primordial Nucleosynthesis

Iofa

2009

Mod. Phys. Lett. A

View full text Add to dashboard Cite

Abstract5D models with one 3D brane and one infinite extra dimension are studied. Matter is confined to the brane, gravity extends to the bulk. Models with positive and negative tension of the brane are studied. Cosmological solutions on the brane are obtained by solving the generalized Friedmann equation. As the input in cosmological solutions we use the present-time observational cosmological parameters. We find constraints on dimensionless combinations of scales of 5D models which follow from the requirement that with cosmological solutions we reproduce the data on production of 4 He in primordial nucleosynthesis.

show abstract

Branes: cosmological surprise and observational deception

Cited by 8 publications

References 22 publications

Constraining the brane tension in Randall-Sundrum cosmology through gravitational waves from binary neutron stars

Constraining the brane tension in Randall-Sundrum cosmology through gravitational waves from binary neutron stars

Model-independent dark energy reconstruction scheme using the geometrical form of the luminosity-distance relation

Constraints on Parameters of Models With Extra Dimension From Primordial Nucleosynthesis

Contact Info

Product

Resources

About