Talk detail

Participant	Krasinski, Andrzej
Institution	N. Copernicus Astronomical Center, Polish Academy of Sciences - Bartycka 18 - Warsaw - Poland - Poland

Session	TC3	Accepted		Order	Time
Talk	Oral abstract	Title	DRIFT OF LIGHT SOURCES INDUCED BY NONSYMMETRIC COSMIC FLOW - an observational test of inhomogeneity of the Unviverse
Co-authors
Abstract	Investigation of null geodesic equations in the Szekeres models shows that each observer would see any chosen galaxy drift across the sky at a rate of up to 10^(-6) arc seconds per year [1]. The drift will be possible to measure using devices that are under construction; the required time of monitoring would be approx. 10 years. This effect is zero in the FLRW models, so it provides a measure of inhomogeneity of the Universe. In the Szekeres models, the condition for zero drift is zero shear. But in the shearfree normal models, the condition for zero drift is zero conformal curvature [2]. This shows that the drift is induced by low symmetry rather than shear. [1] A. Krasinski and Krzysztof Bolejko, Phys. Rev. D83, 083503 (2011). [2] A. Krasinski, Phys. Rev. D84, 023510 (2011).