Galaxy clusters are powerful cosmological probes, sensitive to the growth of structure and the matter content of the universe. Using the AMICO algorithm on the KiDS-DR4 dataset, we present a homogeneous catalog of ~8000 clusters with accurate richness and membership estimates up to z ≈ 0.8. We jointly model cluster counts and weak-lensing profiles in KiDS-1000 to calibrate the mass–richness...
I will present cosmological constraints using the abundance of weak-lensing shear-selected galaxy clusters selected in the Hyper Suprime-Cam (HSC) Subaru Strategic Program. The clusters are selected on the mass maps constructed using the latest three-year (Y3) weak-lensing data with an area of ≈ 500 deg2, resulting in a sample size of 129 clusters with a high signal-to-noise ratio 𝜈 of 𝜈 ≥...
The damping wing signatures in high-redshift quasars have proven instrumental in studying the epoch of reionization. With the upcoming Euclid mission set to discover many more quasars, it is crucial to explore what this new set of quasars might reveal not only about the reionization history but also its topology. The reionization topology near the epoch depends on several parameters, including...
SKA Science Data Challenge 3b (SDC3b) ended in May 2025 and released the results in August. Participants are required to perform inference on the simulated 21cm power spectrum and imaging to estimate the HI fraction. The simulation represents the SKA-Low observation of the 21cm signal from Cosmic Dawn and Era of Reionization (CD/EoR). YEYE team participated and submitted results on all four...
