# Cosmic-web quenching with DESI DR1: T-Web environments and mass-dependent red/blue classification

**Authors:** Hafiz Inam Ullah, Muhammad Awais, Tonatiuh Matosb, John F. Suárez-Pérez  
**arXiv:** [2604.02463](https://arxiv.org/abs/2604.02463)  
**Date:** 2026-04-02  
**Summary page:** https://www.summarizepaper.com/en/paper/2604.02463v1/

## Key points

- Relationship between galaxy properties and cosmic web environment studied using DESI DR1 survey data
- Large-scale structures of voids, sheets, filaments, and knots reconstructed using Tidal-Tensor formalism
- Analysis focused on BGS (redshift $0.15$-$0.55$), LRG ($0.6$-$0.9$), and ELG ($0.6$-$1.6$) galaxy populations
- Trends in color distribution of galaxies across different cosmic environments observed:
- Non-monotonic evolution of red fraction in BGS galaxies with differences in voids, sheets, filaments, and knots
- Environment-dependent quenching patterns in LRGs with variations in red fractions across cosmic structures
- Strong redshift evolution in ELGs' color distribution, especially noticeable in filaments
- High-mass selection increased red fractions of galaxies while maintaining environmental influences
- Filaments and sheets hosted a larger proportion of both red and blue galaxies compared to knots despite having elevated red fractions themselves
- Stellar mass primarily drives galaxy quenching processes with environmental factors as secondary modulators

## Summary

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In this study, we have explored the relationship between galaxy properties and their cosmic web environment using data from the DESI DR1 survey. By utilizing a sophisticated tidal-tensor (T-Web) formalism, we reconstructed the large-scale structures of voids, sheets, filaments, and knots in a vast cosmic volume. Our analysis focused on three distinct galaxy populations: BGS (with redshifts ranging from $0.15$ to $0.55$), LRG ($0.6$ to $0.9$), and ELG ($0.6$ to $1.6$), representing different evolutionary stages of galaxies. Through our investigation, we uncovered intriguing trends in the color distribution of galaxies across various cosmic environments. Notably, we observed a non-monotonic evolution of the red fraction in BGS galaxies with subtle differences between voids, sheets, filaments, and knots at different redshifts. Similarly, LRGs exhibited clear environment-dependent quenching patterns with significant variations in red fractions across different cosmic structures. ELGs displayed a strong redshift evolution in their color distribution, particularly evident in filaments where a substantial drop in red fractions was observed over time. Interestingly, our analysis revealed that high-mass selection increased the red fractions of galaxies while preserving underlying trends related to environmental influences. Furthermore, our examination of relative red and blue fractions highlighted that filaments and sheets hosted a larger proportion of both types of galaxies compared to knots despite exhibiting elevated red fractions themselves. The $(g-r)$ color distributions provided additional insights into the diversity of galaxy populations within different cosmic environments. Overall, our findings suggest that stellar mass plays a primary role in driving galaxy quenching processes, while environmental factors serve as secondary modulators influencing these trends. This is particularly pronounced in dense knots and lower stellar mass regimes. This comprehensive analysis sheds light on the complex interplay between galaxy properties and their surrounding cosmic web environments and underscores the importance of considering both intrinsic characteristics and external influences when studying galaxy evolution. This detailed exploration provides valuable insights into the mechanisms shaping galaxy evolution across diverse cosmic environments and sets the stage for further investigations into the intricate interplay between stellar properties and large-scale structures in shaping the cosmos as we know it today.