Description
Chair: R. Mann
Silke Britzen
(MPIfR)
23/07/2015, 15:30
Seniors
Highest resolution Event Horizon Telescope (EHT) observations will probably soon
tell us more about the supermassive black hole at the Galactic Centre (Sgr A*) and the cores of active galactic nuclei (AGN).
It might also help to clarify the long-standing question whether the central massive
objects in AGN are instead close pairs of black holes. Mergers of supermassive black hole pairs...
Prof.
REMO GARATTINI
(University of Bergamo)
23/07/2015, 16:00
Seniors
We consider the effects of Distorted Gravity on the traversability of the wormholes. In particular, we consider configurations which are sustained by their own gravitational quantum fluctuations. The Ultra-Violet divergences appearing to one loop are taken under control with the help of a Noncommutative geometry representation and Gravity's Rainbow. In this context, it will be shown that for...
Prof.
Mariafelicia De Laurentis
(Tomsk State Pedagogical University)
23/07/2015, 16:30
Seniors
Axially symmetric solutions for f(R)-gravity can be derived starting from exact spherically symmetric solutions achieved by Noether symmetries. The method takes advantage of a complex coordinate transformation previously developed by Newman and Janis in general relativity. An example is worked out to show the general validity of the approach. The physical properties of the solution are also considered.
Jürgen Struckmeier
(GSI)
23/07/2015, 17:00
Seniors
Any physical theory that follows from an *action principle* should be *invariant in its form* under mappings of the reference frame in order to comply with the *general principle of relativity*. The required form-invariance of the action principle implies that the mapping must constitute a particular *extended canonical transformation*.
In the realm of the covariant Hamiltonian formulation...
