49. Agnieszka Uczyńska  wywiad z Sebastianem J. Szybka Osobliwości  patologie czasu i przestrzeni Nauka W Polsce  serwis PAP (2007). [abstract] [journal] 
Abstract: Wywiad dla Polskiej Agencji Prasowej  serwis Nauka w Polsce. 
50. Agnieszka Uczyńska  wywiad z Sebastianem J. Szybka Tajemnice ciemnej energii Nauka w Polsce  serwis PAP (2007). [abstract] [journal] 
Abstract: Wywiad dla Polskiej Agencji Prasowej  serwis Nauka w Polsce. 
51. Artur Janda Spherically Symmetric Solutions of the EinsteinBach Equations and a Consistent Spin2 Field Theory Acta Phys. Pol., B , vol. B37/12, pp. 36673678 (2006). [abstract] [preprint] [journal] [download] 
Abstract: We briefly present a relationship between General Relativity coupled to certain spin0 and spin2 field theories and higher derivatives metric theories of gravity. In a special case, described by the EinsteinBach equations, the spin0 field drops out from the theory and we obtain a consistent spintwo field theory interacting gravitationally, which overcomes a well known inconsistency of the theory for a linear spintwo field coupled to the Einstein's gravity. Then we discuss basic properties of static spherically symmetric solutions of the EinsteinBach equations. 
52. Leszek M. Sokołowski, Andrzej Staruszkiewicz On the issue of gravitons Class. Quant. Grav. , vol. 23, pp. 59075918 (2006). [abstract] [preprint] [journal] 
Abstract: We investigate the problem of whether one can anticipate any features of the graviton without a detailed knowledge of a full quantum gravity. Assuming that in linearized gravity the graviton is in a sense similar to the photon, we derive a curious large number coincidence between the number of gravitons emitted by a solar planet during its orbital period and the number of its nucleons. In Einstein's GR the analogy between the graviton and the photon is ill founded. A generic relationship between quanta of a quantum field and plane waves of the corresponding classical field is broken in the case of GR. The graviton cannot be classically approximated by a generic pp wave nor by the exact plane wave. Most important, the ADM energy is a zero frequency characteristic of any asymptotically flat spacetime and this means that any general relationship between energy and frequency is a priori impossible. In particular the formula $E=\hbar \omega$ does not hold. The graviton must have features different from those of the photon and these cannot be predicted from classical general relativity. 
53. P. T. Chrusciel, G. M. Greuel, R. Meinel, S. J. Szybka The Ernst equation and ergosurfaces Class. Quantum Grav., vol. 23, pp. 43994414 (2006). [abstract] [preprint] [journal] 
Abstract: We show that analytic solutions $\mcE$ of the Ernst equation with nonempty zerolevelset of $\Re \mcE$ lead to smooth ergosurfaces in spacetime. In fact, the spacetime metric is smooth near a "Ernst ergosurface" $E_f$ if and only if $\mcE$ is smooth near $E_f$ and does not have zeros of infinite order there. 
54. Leszek M. Sokołowski Physical interpretation and viability of various metric nonlinear gravity theories Proceedings of MG11 Meeting, Berlin, July 2329, 2006 (2006).

Abstract:
