Shell-like structures in our cosmic neighbourhood

Understand

Signatures of the processes in the early Universe are imprinted in the cosmic web.

• Some of them may define shell-like structures characterised by typical scales.
• We search for shell-like structures in the distribution of nearby rich clusters of galaxies drawn from the SDSS DR8.
• We calculate the distance distributions between rich clusters of galaxies, and groups and clusters of various richness, look for the maxima in the distance distributions, and select candidates of shell-like structures.