It is well known that 4–dimensional Kerr–NUT–AdS spacetime possesses the hidden symmetry associated with the Killing–Yano tensor. This tensor is ‘universal’ in the sense that there exist coordinates where it does not depend on any of the free parameters of the metric. Recently the general higher dimensional Kerr–NUT–AdS solutions of the Einstein equations were obtained. We demonstrate that all ...

Smooth time dependent supergravity solutions corresponding to analytic continuations of Kerr black holes are constructed and limits with a local de Sitter phase are found. These solutions are non-singular due to a helical twist in space and a fine tuning of the energy flow in the spacetime. For the extremal limit in which the mass and twist parameters are equal the S-brane undergoes de Sitter e...

Dynamics of relativistic outflows along the rotation axis of a Kerr black hole is investigated using a simple model and the evolution of the speed of the flow relative to the ambient medium is studied. We assume that a flow clump is under the influence of the relativistic tidal force of the central source as well as the Lorentz force due to the large-scale electromagnetic field that is assumed ...

Appetite and gut hormone responses to moderate-intensity continuous exercise versus high1 intensity interval exercise, in normoxic and hypoxic conditions 2 3 Daniel P Bailey, Lindsey R Smith, Bryna C Chrismas, Lee Taylor, David J Stensel, Kevin 4 Deighton, Jessica Douglas, Catherine J Kerr. 5 6 Author affiliations 7 Institute for Sport and Physical Activity Research, Department of Sport Science...

We present black hole uniqueness theorems for the C-metric and Ernst solution. The proof follows a similar strategy as that used to prove the uniqueness of the Kerr-Newman solution, however the presence of an acceleration horizon provides some critical differences. We also show how to derive the Bunting/Mazur result (on the positivity of a suitable divergence required in the proof) using new me...

We present a modified version of the boundary counterterm method for removing divergences from the action of an asymptotically AdS spacetime. The standard approach renders the action finite but leaves diffeomorphism invariance partially broken if the dimension of the spacetime is odd. We show that this symmetry is restored by a new boundary counterterm, needed to cancel a divergence that appear...

We develop a formalism for general relativistic, grand canonical ensembles in space-times with timelike Killing fields. Using that, we derive ideal gas laws, and show how they depend on the geometry of the particular space-times. A systematic method for calculating Newtonian limits is given for a class of these space-times, which is illustrated for Kerr space-time. In addition, we prove uniquen...

The strain-magnetooptical properties of single crystals the ferrimagnetic spinel CoFe2O4, which reflect a correlation between optical (magnetoabsorption and magnetoreflection) magnetostriction, have been studied in infrared spectral range. conditions for observation strain-magnetooptics are specified physical mechanisms responsible these effects explained.

We report an experimental study on magneto-optical (MO) Kerr effects of yttrium-iron garnet (YIG) thin films incorporating Au nanoparticles. The polar MO Kerr spectra in the wavelength between 400 and 800 nm show that, by incorporating the Au nanoparticles, Kerr rotation angles become negative values in the region, where the localized surface plasmon polariton (SPP) resonance of the Au nanopart...