3 papers
astro-ph.CO2025
Nonlinear reconstruction of general dark energy theories
Yunhao Gao, Baojiu Li, Jie Wang
The large variety and number of dark energy (DE) theories make it impractical to perform detailed analyses on a case-by-case basis, which has motivated proposals to ``parameterize"…
astro-ph.CO2025
The Poisson noise in modeling the redshift-space distortion at large scales
Hongxiang Chen, Jie Wang, Baojiu Li
We investigate the errors in modeling the redshift-space distortion (RSD) effect at large linear scales, using data from the Millennium simulation. While standard theoretical templ…
astro-ph.CO2023
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…