English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We carry out a statistical analysis of the spatial distribution of galaxiesat cosmological redshifts $0.16 \leq z \leq 0.47$ based on the SDSS\ DR12\ LOWZcatalogue. Our aim is to search and study possible large-scale quasi-regularstructures embedded in the {\it cosmic web}. We calculate projections of theCartesian galaxy coordinates on different axes (directions) densely coveringcertain regions in the sky to look for special directions along whichone-dimensional distributions of the projections contain significantquasi-periodic components. These components appear as peaks in the powerspectra and lie in a narrow range of wave numbers $0.05 < k < 0.07$. Particularattention is paid to the evaluation of the significance of the peaks. It isfound that the significance of the dominant peaks for some selected directionsexceeds $(4 - 5)\sigma$. In order to reduce possible selection effects, wecreate a mock homogeneous catalogue of spatial distribution of galaxies byadding a random set of artificial objects (points) to the real galaxies understudy. The power spectrum of this cumulative model data also demonstratessignificant peak corresponding to approximately the same scale. As a result weassume the existence of an anisotropic cosmological quasi-periodic structurewith characteristic scale $(116 \pm 10)~h^{-1}$~Mpc.

Search for a possible quasi-periodic structure based on data of the SDSS DR12 LOWZ