Anti-De Sitter Curvature Radius Constrained by Quasars in Brane-World Scenarios

Coimbra-Araújo, Carlos H.; Rocha, Roldão da; Pedron, Isabel Tamara

doi:10.1142/s0218271805007462

Cited by 22 publications

(24 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shall be seen in a sequel paper these corrections are shown to be outstandingly wide in the case of mini-BHs, wherein the event horizon can be a lot of magnitude orders smaller than ℓ. As proved in [28], the solution above for R Sbrane can be also found in terms of the curvature radius ℓ. It is then possible to find an expression for the luminosity L in terms of the radius of curvature, regarding formula (14).…”

Section: A Corrections In the Radius Of Schwarzschildmentioning

confidence: 79%

Variation in the luminosity of Kerr quasars due to an extra dimension in the brane Randall–Sundrum model

Rocha¹,

Coimbra-Araújo²

2005

J. Cosmol. Astropart. Phys.

View full text Add to dashboard Cite

We propose an alternative theoretical approach showing how the existence of an extra dimension in Randall-Sundrum model can estimate the correction in the horizon of Schwarzschild and Kerr black holes, and consequently its measurability in terms of the variation of quasar luminosity, which can be caused by a imprint of an extra dimension endowing the geometry of brane-world scenario in AdS5 bulk. The rotation effects cause a more prominent correction in Kerr horizon radii than in Schwarzschild (static black hole) radius, via brane-world effects, and the consequent bigger variation in the luminosity in Kerr black holes quasars. This paper is intended to investigate the variation of luminosity due to accretion of gas in Schwarzschild and Kerr black holes (BHs) in the center of quasars, besides also investigating the variation of luminosity in supermassive BHs by brane-world effects, using Randall-Sundrum model.

show abstract

Section: A Corrections In the Radius Of Schwarzschildmentioning

confidence: 79%

Variation in the luminosity of Kerr quasars due to an extra dimension in the brane Randall–Sundrum model

Rocha¹,

Coimbra-Araújo²

2005

J. Cosmol. Astropart. Phys.

View full text Add to dashboard Cite

show abstract

“…In previous papers we have explored Randall-Sundrum (RS) formalism in the context of supermassive black holes (BHs) present in the nucleus of galaxies and quasars, and when they cause deviations from the 4D general relativity, these corrections should cause a small deviation in all BH properties [18,19]. It has already proposed the observation of brane-world BHs, and there are also other proposals on probing extra dimensions [20,21].…”

Section: Introductionmentioning

confidence: 99%

Extra dimensions at the CERN LHC via mini-black holes: Effective Kerr-Newman brane-world effects

Rocha

Coimbra-Araújo

2006

Phys. Rev. D

View full text Add to dashboard Cite

We solve Einstein equations on the brane to derive the exact form of the brane-world-corrected perturbations in Kerr-Newman singularities, using Randall-Sundrum and Arkani-Hamed-DimopoulosDvali (ADD) models. It is a consequence of such models that Kerr-Newman mini-black holes can be produced in LHC. We use this approach to derive a normalized correction for the Schwarzschild MyersPerry radius of a static 4 n-dimensional mini-black hole, using more realistic approaches arising from Kerr-Newman mini-black hole analysis. Besides, we prove that there are four Kerr-Newman black hole horizons in the brane-world scenario we use, although only the outer horizon is relevant in the physical measurable processes. Parton cross sections in LHC and Hawking temperature are also investigated as functions of Planck mass (in the LHC range 1-10 TeV), mini-black hole mass, and the number of large extra dimensions in brane-world large extra-dimensional scenarios. In this case a more realistic braneeffect-corrected formalism can achieve more precisely the effective extra-dimensional Planck mass and the number of large extra dimensions-in the Arkani-Hamed-Dimopoulos-Dvali model -or the size of the warped extra dimension -in Randall-Sundrum formalism.

show abstract

“…Now we can explore the idea that, if black holes and specially the supermassive black holes (SMBHs) present in the nucleus of galaxies and quasars, do cause deviations from the 4D general relativity, these corrections should cause a small deviation in all SMBH properties [4]. First we need to estimate the corrected Schwarzschild brane radius R Sbrane .…”

Section: Accretion Efficience In Schwarzschild Quasars With Corrementioning

confidence: 99%

Is it possible to test brane-world scenarios by observation of quasars and microquasars?

2005

View full text Add to dashboard Cite

The aim of this work is to present a possible way to estimate observational electromagnetical clues in the spectrum of quasars and microquasars due to the presence of extra dimensions. Here we analyze two possible ways to detect these electromagnetic signals: by the brane corrected accretion mechanism and by production of electromagnetic KK modes. We show that for the static black hole accretion case, the brane corrections cause a extremelly small variation in the luminosity of the quasar. For the electromagnetic KK modes case, apparently the answer for the biggest quasars is positive and on the other hand, the possibility that microquasars can present constraints on extra-dimensional gravity in their spectra is less probable.

show abstract

Anti-De Sitter Curvature Radius Constrained by Quasars in Brane-World Scenarios

Cited by 22 publications

References 57 publications

Variation in the luminosity of Kerr quasars due to an extra dimension in the brane Randall–Sundrum model

Variation in the luminosity of Kerr quasars due to an extra dimension in the brane Randall–Sundrum model

Extra dimensions at the CERN LHC via mini-black holes: Effective Kerr-Newman brane-world effects

Is it possible to test brane-world scenarios by observation of quasars and microquasars?

Contact Info

Product

Resources

About