CosmicWeb is a pipeline for reconstructing the COSMOS-Web large-scale structure using weighted kernel density estimation (KDE). The workflow produces per-slice density maps, per-galaxy overdensities, and files that can be used for visualization and analysis. For a full detail of the procedure, you can read Hatamnia et al. 2025.
The reconstructed density maps and per-galaxy overdensity catalogs are now publicly available via the official COSMOS-Web data release portal and Google Drive:
https://cosmos2025.iap.fr/lss.html
https://drive.google.com/drive/folders/1FaqB8LKz1Sdrc-vnBJ_cv6pHbGS5rSEJ?usp=sharing
A Jupyter notebook demonstrating how to load and use the released catalog is provided in:
Codes/6-Process_Available_Data.ipynb
Photometric-redshifts are used to compute statistical weights for each galaxy.
File: 1-Weight_Estimations.ipynb
Smoothing bandwidths are derived for each redshift slice.
File: 2-Bandwidth.ipynb
Weighted KDE density maps are generated for all slices across the COSMOS-Web field.
File: 3-Density_Construction.py
Each galaxy’s overdensity is computed.
File: 4-Galaxy_Density.ipynb
Instructions and examples showing how to load density maps and visualize them.
File: 5-Plotting_Slices.ipynb
Demonstrates how to load and work with the publicly released COSMOS-Web LSS catalog.
File: Codes/6-Process_Available_Data.ipynb
If you use any part of this pipeline, please cite:
- Hatamnia et al. 2025 (ADS)
- Taamoli et al. 2024 (ADS)
- Chartab et al. 2020 (ADS)
- Darvish et al. 2015 (ADS)
An augmented-reality visualization of COSMOS-Web has been developed in Unity.