Volume 86, Number 2, April 2009
|Number of page(s)||5|
|Section||Geophysics, Astronomy and Astrophysics|
|Published online||06 May 2009|
Flat Universe with hyperbolic voids
Yerevan Physics Institute - Yerevan, Armenia
2 Yerevan State University - Yerevan, Armenia
3 School of Mathematical Sciences, Monash University - Clayton, Australia
Corresponding author: email@example.com
Accepted: 31 March 2009
The properties of geodesics flow are studied in a Friedmann-Robertson-Walker metric perturbed due to the inhomogeneities of matter. The basic, averaged Jacobi equation is derived, which reveals that the low-density regions (voids) are able to induce hyperbolicity, even if the global curvature of the Universe is zero or slightly positive. It is shown that the energy independence is a characteristic property of these geometric effects. The importance of these conclusions is determined by the temperature independent ellipticity of excursion sets and regions of different randomness found in Kolmogorov Cosmic Microwave Background (CMB) maps.
PACS: 98.80.-k – Cosmology / 98.70.Vc – Background radiations / 95.10.Fh – Chaotic dynamics
© EPLA, 2009
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