6 papers
Constraining gravity with the decay rate of cosmological gravitational potential
Xinyi Zhao, Pengjie Zhang, Fuyu Dong
A key task in cosmology is to test the validity of general relativity (GR) at cosmological scales and, therefore, to distinguish between dark energy and modified gravity (MG) as th…
Synergy between the gravitational potential decay rate and other structure growth probes in testing gravity
Shang Li, Pengjie Zhang, Fuyu Dong
We test gravity by exploiting the synergy between the gravitational potential decay rate () and complementary structure-growth probes: these observables respond to MG…
Closing the Observational Gap in Cosmic Dynamics: AI-Enabled Reconstruction of the Universe's Vorticity and Rotational Flow Morphology
Ziyong Wu, Xu Xiao, Fuyu Dong +7
The cosmic vorticity field, an essential tracer of nonlinear structure formation, has remained observationally inaccessible because transverse galaxy motions are difficult to measu…
The Most Probable Behaviour of the Dark Energy Equation of State Indicates a Thawing Quintessence Field: Tomographic Alcock-PaczyÅski Test with Redshift-Space Correlation Function II
Fuyu Dong, Changbom Park
We apply an extended Alcock-PaczyÅski (AP) test to the Sloan Digital Sky Survey data to constrain the dark energy models with the Chevallier-Polarski-Linder (CPL) parametrization…
Constraining with Lensing Statistics in Low and High Density Regions
Yiqi Huang, Fuyu Dong, Jun Zhang +2
Lensing studies are typically carried out around high density regions, such as groups and clusters, where the lensing signals are significant and indicative of rich density structu…
Self-similar decomposition of the hierarchical merger tree of dark matter halos
Wenkang Jiang, Jiaxin Han, Fuyu Dong +1
In the CDM universe, structure formation is generally not a self-similar process, while some self-similarity remains in certain statistics which can greatly simplify our descri…