3 papers
astro-ph.CO2026
Turning dispersion into signal: density-split analyses of pairwise velocities
Aritra Kumar Gon, Yan-Chuan Cai
Pairwise velocities of the large-scale structure encode valuable information about the growth of structure. They can be observed indirectly through redshift-space distortions and t…
astro-ph.CO2025
Dynamical analysis of stacked samples of asymmetric, non-static, self-gravitating systems
Yan-Chuan Cai, Nick Kaiser, Shaun Cole +1
We use numerical simulations to explore biases that arise in dynamical estimates of the mean mass profile for a collection of galaxy clusters that have been stacked to make a compo…
astro-ph.CO2024
Estimation of line-of-sight velocities of individual galaxies using neural networks I. Modelling redshift-space distortions at large scales
Hongxiang Chen, Jie Wang, Tianxiang Mao +7
We present a scheme based on artificial neural networks (ANN) to estimate the line-of-sight velocities of individual galaxies from an observed redshift-space galaxy distribution. W…