Brazilian Journal of Physics
versión On-line ISSN 1678-4448
CAPRONI, Anderson; ABRAHAM, Zulema y CUESTA, Herman J.Mosquera. Influence of the black hole rotation on accretion discs and jets in active galaxies: the case of NGC 1068. Braz. J. Phys. [online]. 2005, vol.35, n.4b, pp. 1167-1171. ISSN 1678-4448. http://dx.doi.org/10.1590/S0103-97332005000700044.
Although we do not observe directly black holes in the Universe, their presence has been inferred in several astrophysical systems, from galactic to extragalactic scales. In this work, we will restrict our focus in the possible signatures of the presence of Kerr black holes in active galactic nuclei, one of the most powerful sources in the Universe. Particularly, we will discuss how jet/accretion disc precession and their directional stability can be used to trace the accretion disc properties as well as the black hole spin in the Seyfert galaxy NGC 1068.