Tracing correlations between galaxy properties across the Cosmic Web: An IllustrisTNG-based study

Anindita Nandi; Biswajit Pandey; Prakash Sarkar

doi:10.1016/j.ascom.2025.101023

Tracing correlations between galaxy properties across the Cosmic Web: An IllustrisTNG-based study

Cosmology and Nongalactic Astrophysics 2026-01-07 v2

Authors: Anindita Nandi , Biswajit Pandey , Prakash Sarkar

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Abstract

We explore the impact of cosmic web environments on galaxy properties such as $(u-r)\,$ colour, stellar mass, star formation rate, and stellar metallicity, using a stellar mass-matched sample of simulated galaxies from the IllustrisTNG simulation. We use Normalized Mutual Information (NMI) to quantify correlations among galaxy properties and apply Student's t-test to assess the statistical significance of their differences across cosmic web environments. In every case, the null hypothesis is rejected at $> 99.99\%$ confidence, providing strong evidence that correlations among galaxy properties are strongly dependent on cosmic web environments.

Cite

@article{arxiv.2509.11288,
  title  = {Tracing correlations between galaxy properties across the Cosmic Web: An IllustrisTNG-based study},
  author = {Anindita Nandi and Biswajit Pandey and Prakash Sarkar},
  journal= {arXiv preprint arXiv:2509.11288},
  year   = {2026}
}

Comments

18 pages, 7 figures, 2 tables. Accepted for publication in Astronomy and Computing

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