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Back to the Institute Motion of test particles in six-dimensional dilatonic Kaluza-Klein theory (pdf file)
by M. Biesiada, J. Syska

Abstract (html file)    Figures: Fig.1Fig.2 Fig.3Fig.4 Fig.5Fig.6 Fig.7Fig.8

Multidimensional theories still remain attractive from the point of view of better understanding of fundamental interactions. In this paper we consider a six - dimensional Kaluza -- Klein type model at the classical level. We derive static spherically symmetric solutions to the multidimensional Einstein equations. They are fundamentally different from four - dimensional Schwarzschild solutions: they are horizon free and the presence of massless dilaton field has the same dynamical effect as the existence of additional massive matter in the system.
Then we analyse the motion of test particles in such spherically symmetric configurations. The emphasis is put on some observable quantities like redshifts.  It is suggested that strange features of emission lines from active galactic nuclei as well as quasar - galaxy associations may in fact be manifestations of multidimensionality of ourworld.   To the top   Dilatons, redshifts  and the structure of galaxies       Figure
by M. Biesiada  

Abstract (html file)

Some open problems in extragalactic astrophysics like: the nature of central massive objects, asymmetric K emission lines from AGNs and quasar-galaxy associations are reviewed.
It is proposed that these facts can be understood within the classical self-consistent multidimensional field theory with dilaton. Dilatonic balls in the centers of galaxies can be responsible for kinematical effects usually attributable to hypothethical massive central black hole. Moreover, peculiarities of emission lines from active galactic nuclei can be explained in a natural way assuming that dilatonic configurations are placed in central parts of AGNs. When we imagine that the large scale structure in the universe could have been built upon dilatonic condensates we are also able to understand qualitatively the existence of associations of high and low reshift objects as well as their main features.  
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          Last updated: 12.08.2000