Swarm Intelligence-based Extraction and Manifold Crawling Along the Large-Scale Structure

Petra Awad*, Reynier Peletier, Marco Canducci, Rory Smith, Abolfazl Taghribi, Mohammad Mohammadi, Jihye Shin, Peter Tino, Kerstin Bunte

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

The distribution of galaxies and clusters of galaxies on the mega-parsec scale of the Universe follows an intricate pattern now famously known as the Large-Scale Structure or the Cosmic Web. To study the environments of this network, several techniques have been developed that are able to describe its properties and the properties of groups of galaxies as a function of their environment. In this work we analyze the previously introduced framework: 1-Dimensional Recovery, Extraction, and Analysis of Manifolds (1-DREAM) on N-body cosmological simulation data of the Cosmic Web. The 1-DREAM toolbox consists of five Machine Learning methods, whose aim is the extraction and modelling of 1-dimensional structures in astronomical big data settings. We show that 1-DREAM can be used to extract structures of different density ranges within the Cosmic Web and to create probabilistic models of them. For demonstration, we construct a probabilistic model of an extracted filament and move through the structure to measure properties such as local density and velocity. We also compare our toolbox with a collection of methodologies which trace the Cosmic Web. We show that 1-DREAM is able to split the network into its various environments with results comparable to the state-of-the-art methodologies. A detailed comparison is then made with the public code DisPerSE, in which we find that 1-DREAM is robust against changes in sample size making it suitable for analyzing sparse observational data, and finding faint and diffuse manifolds in low density regions.
Original languageEnglish
Article numberstad428
JournalMonthly Notices of the Royal Astronomical Society
Early online date8 Feb 2023
DOIs
Publication statusE-pub ahead of print - 8 Feb 2023

Keywords

  • Cosmology: large-scale structure of Universe
  • methods: data analysis
  • techniques: miscellaneous

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