Conveners
Cosmology 7
- Li Ran
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 ≥...
We present a joint analysis of galaxy clustering and galaxy-galaxy lensing measurements from BOSS galaxies using the method of simulation-based emulation combined with halo occupation distribution model. Our emulator is constructed with Aemulus $\nu$ simulations, a suite of $w\nu$CDM N-body simulations with massive neutrinos as an independent particle species. We combine the small-scale...
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...
The LCDM model has long served as the cornerstone of modern cosmology, successfully explaining a wide range of observations. However, with the advent of precision cosmology, emerging discrepancies among key parameters have highlighted its limitations in comprehensively describing the universe’s evolution. To address these challenges, my research explores interacting dark sector models,...
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...
