Could the variation in quasar luminosity, due to extra dimension 3-brane in RS model, be me.pdfVIP

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Could the variation in quasar luminosity, due to extra dimension 3-brane in RS model, be me.pdf

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Could the variation in quasar luminosity, due to extra dimension 3-brane in RS model, be me

a r X i v : a s t r o - p h / 0 5 0 9 3 6 3 v 3 1 6 S e p 2 0 0 5 Could the variation in quasar luminosity, due to extra dimension 3-brane in RS model, be measurable? R. da Rocha? IFGW, Universidade Estadual de Campinas, CP 6165, 13083-970 Campinas, SP, Brazil. C. H. Coimbra-Arau?jo? Departamento de Astronomia, Universidade de Sa?o Paulo, 05508-900 Sa?o Paulo, SP, Brazil. and IFGW, Universidade Estadual de Campinas, CP 6165, 13083-970 Campinas, SP, Brazil. We propose an alternative theoretical approach showing how the existence of an extra dimension in RS model can estimate the correction in the Schwarzschild radius of 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 a brane-world scenario in an AdS5 bulk. This paper is intended to investigate the variation of luminosity due to accretion of gas in black holes (BHs) in the center of quasars, besides also investigating the variation of luminosity in supermassive BHs by brane-world effects, using RS model. PACS numbers: 04.50.+h 11.25.-w, 98.80.Jk I. INTRODUCTION The possibility concerning the existence of extra di- mensions is one of the most astonishing aspects on string theory and the formalism of p-branes. In spite of this possibility, extra dimensions still remain up to now un- accessible and obliterated to experiments. An alternative approach to the compactification of extra dimensions, provided by, e.g., Kaluza-Klein (KK) and string theories [1, 2, 3, 4], involves an extra dimension which is not com- pactified, as pointed by, e.g., RS model [5, 6]. This extra dimension implies deviations on Newton’s law of grav- ity at scales below about 0.1 mm, where objects may be indeed gravitating in more dimensions. The electromag- netic, weak and strong forces, as well as all the matter in the universe, would be trapped on a brane with three spatial dimensions, and only gravitons would be allo