The luminosity-redshift relation in brane-worlds: I. Analytical results

Keresztes, Zoltán; Gergely, L.; Nagy, Balázs; Szabó, Gyula

doi:10.1186/1754-0410-1-4

Cited by 19 publications

(27 citation statements)

References 58 publications

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“…Unfortunately the lack of closure of the dynamical equations on the brane, despite some progress [22]- [24], hindered the development of a full perturbation theory on the brane, hence observations on the Cosmic Microwave Background and on structure formation could not be explored in full generality within the theory. Confrontation with Nucleosynthesis [25] and type Ia supernova data has been successfully done [26]- [27]. Brane-world effects were also shown to successfully replace dark matter, both in the dynamics of clusters [28] and in galactic dynamics [29]- [31], thus solving the rotation curve problem [32].…”

Section: Introductionmentioning

confidence: 99%

Brane-world stars with a solid crust and vacuum exterior

Ovalle

Gergely

Casadio

2015

Class. Quantum Grav.

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170

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The minimal geometric deformation approach is employed to show the existence of braneworld stellar distributions with vacuum Schwarzschild exterior, thus without energy leaking from the exterior of the brane-world star into the extra dimension. The interior satisfies all elementary criteria of physical acceptability for a stellar solution, namely, it is regular at the origin, the pressure and density are positive and decrease monotonically with increasing radius, finally all energy conditions are fulfilled. A very thin solid crust with negative radial pressure separates the interior from the exterior, having a thickness ∆ inversely proportional to both the brane tension σ and the radius R of the star, i.e. ∆ −1 ∼ R σ. This brane-world star with Schwarzschild exterior would appear only thermally radiating to a distant observer and be fully compatible with the stringent constraints imposed on stellar parameters by observations of gravitational lensing, orbital evolutions or properties of accretion disks. * jovalle@usb.ve † laszlo.a.

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Section: Introductionmentioning

confidence: 99%

Brane-world stars with a solid crust and vacuum exterior

Ovalle

Gergely

Casadio

2015

Class. Quantum Grav.

Self Cite

133

170

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“…Recently there has been some progress in this direction [35]. An extensive study on confronting this braneworld model with observations in a more rigorous method can provide us with necessary information on the merits and demerits of the formalism.…”

Section: Summary and Open Issuesmentioning

confidence: 99%

“…It is thus important to determine the nature as well as the role of this entity, called in general the Weyl fluid, in the cosmological dynamics and perturbations, and find if this scenario has some advantages over others. A recent work [21] has shown its significance as a possible dark matter candidate by Newtonian analysis of perturbations, followed by some confrontation with observations [35]. However, as in GR, the Newtonian analysis of gravitational instability is limited in the sense that it fails to account for the perturbations on scales larger than the Hubble radius.…”

Section: Introductionmentioning

confidence: 99%

Brane cosmology, Weyl fluid, and density perturbations

Pal

2008

Phys. Rev. D

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We develop a technique to study relativistic perturbations in the generalised brane cosmological scenario, which is a generalisation of the multi-fluid cosmological perturbations to brane cosmology.The novelty of the technique lies in the inclusion of a radiative bulk which is responsible for bulkbrane energy exchange, and in turn, modifies the standard perturbative analysis to a great extent.The analysis involves a geometric fluid -called the Weyl fluid -whose nature and role have been studied extensively both for the empty bulk and the radiative bulk scenario. Subsequently, we find that this Weyl fluid can be a possible geometric candidate for dark matter in this generalised brane cosmological framework.

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“…The most general form of the four-dimensional Friedmann equation in braneworld models can be written as [70][71][72][73][74][75][76]…”

Section: −180mentioning

confidence: 99%

Probing extra dimension through gravitational wave observations of compact binaries and their electromagnetic counterparts

Huang

et al. 2017

J. Cosmol. Astropart. Phys.

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The future gravitational wave (GW) observations of compact binaries and their possible electromagnetic counterparts may be used to probe the nature of the extra dimension. It is widely accepted that gravitons and photons are the only two completely confirmed objects that can travel along null geodesics in our four-dimensional space-time. However, if there exist extra dimensions and only GWs can propagate freely in the bulk, the causal propagations of GWs and electromagnetic waves (EMWs) are in general different. In this paper, we study null geodesics of GWs and EMWs in a five-dimensional anti-de Sitter space-time in the presence of the curvature of the universe. We show that for general cases the horizon radius of GW is longer than EMW within equal time. Taking the GW150914 event detected by the Advanced Laser Interferometer Gravitational-Wave Observatory and the X-ray event detected by the Fermi Gamma-ray Burst Monitor as an example, we study how the curvature k and the constant curvature radius l affect the horizon radii of GW and EMW in the de Sitter and Einstein-de Sitter models of the universe. This provides an alternative method for probing extra dimension through future GW observations of compact binaries and their electromagnetic counterparts.

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The luminosity-redshift relation in brane-worlds: I. Analytical results

Cited by 19 publications

References 58 publications

Brane-world stars with a solid crust and vacuum exterior

Brane-world stars with a solid crust and vacuum exterior

Brane cosmology, Weyl fluid, and density perturbations

Probing extra dimension through gravitational wave observations of compact binaries and their electromagnetic counterparts

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