/ 98 02 11 0 v 2 1 7 Fe b 19 98 SPINNING PARTICLE AS A SUPER BLACK HOLE

ar X iv : a st ro - p h / 98 02 22 4 v 1 1 7 Fe b 19 98 M 87 as a Galaxy

I review recent studies about the gravitational potential and stellar dynamics of M87 in particular, and the dynamics of the stars in the presence of a super-massive central black hole, in general. At large radii, investigations of both the X-ray emitting gas and the velocity distribution of globular clusters indicate the presence of large amounts of non-luminous matter, possibly belonging to t...

ar X iv : h ep - p h / 98 02 41 9 v 1 2 5 Fe b 19 98 COURSE LARGE N QCD

ar X iv : h ep - t h / 04 02 11 4 v 1 1 6 Fe b 20 04 Two Stringy Systems of the Kerr Spinning Particle

A classical spinning particle based on the Kerr-Newman black hole (BH) solution is considered. For parameters of spinning particles |a| >> m, the BH horizons disappear and BH image is drastically changed. We show that it turns into a skeleton formed by two coupled stringy systems. One of them is the Kerr singular ring which can be considered as a circular D-string with an orientifold worldsheet...

ar X iv : a st ro - p h / 98 08 19 1 v 2 2 7 Fe b 19 99 Can precessing jets explain the light curves of Gamma - ray Bursts ?

We present a phenomenological model to explain the light curves of gamma-ray bursts. In the model a black hole is orbited by a precessing accretion disc which is fed by a neutron star. Gamma-rays are produced in a highly collimated beam via the Blandford-Znajek mechanism. The gamma-ray beam sweeps through space due to the precession of the slaved accretion disc. The light curve expected from su...

Integrability of spinning particle motion in higher-dimensional rotating black hole spacetimes.

We study the motion of a classical spinning particle (with spin degrees of freedom described by a vector of Grassmann variables) in higher-dimensional general rotating black hole spacetimes with a cosmological constant. In all dimensions n we exhibit n bosonic functionally independent integrals of spinning particle motion, corresponding to explicit and hidden symmetries generated from the princ...