An example of matter distribution in the Szekeres model, which has the structure of a mass-dipole superposed on a monopole. Figure (a) shows various 2D cross-sections, which are presented in the subsequent insets. Figure (b) shows a colour-coded density distribution on a vertical cross-section as depicted in Figure (a). Underdense regions are represented by a dark region in the centre, while the adjacent overdensity is represented by bright colours. The structure's diameter is approximately 80 Mpc, beyond which the density becomes homogeneous ($\rho/\rho_b \rightarrow 1$). Figures (c) and (d) present the matter density distribution on a 2D horizontal cross section that passes through the origin (green plane in Figure (a)). In Figure (c) the density is depicted by the amplitude (the higher amplitude the larger the density), in Figure (d) density is depicted by colours (darker represents underdense regions with $\rho/\rho_b < 1$, and brighter overdense regions with $\rho/\rho_b > 1$). Figures (e) and (f) present the matter density distribution on a 2D horizontal cross section (lower, red horizontal plane in Figure (a)). In Figure (e) the density is depicted by the amplitude, in Figure (f) density is depicted by colours. When referring to this figure, apart from this Scholarpedia article, please also cite Bolejko,Phys.Rev.D73:123508,2006, http://arxiv.org/abs/astro-ph/0604490v2] and [Bolejko,Phys.Rev.D75:043508,2007, http://arxiv.org/abs/astro-ph/0610292].
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|current||11:09, 11 March 2015||1,913 × 2,249 (1.15 MB)||Krzysztof Bolejko||An example of matter distribution in the Szekeres model, which has a structure of a mass-dipole superposed on a monopole. In this case the monopole describes an underdensity (such as a cosmic void) and the dipole describes an overdensity region (such a...|