19 citations · 44 across the 4 of their papers we have counts for
6 papers
Testing LTB as an alternative to dynamical dark energy
Yukang Zhang, Pengjie Zhang
A cosmological constant in a universe weakly violating the cosmological principle (CP) can mimic a dynamical dark energy (DDE) in a FRW universe, and therefore challenging the…
CSST large-scale structure analysis pipeline: IV. Cosmic Voids Identified from Galaxy Group Samples as Probes of the Large-scale Structure
Yingxiao Song, Xiaohu Yang, Yan Gong +16
Because groups are directly associated with halos, they allow for considerably simpler theoretical modeling than approaches based on individual galaxies. We therefore propose to us…
First Observational Evidence for Split Infall Flow of Cosmic Filaments into Clusters
Ji Yao, Huanyuan Shan, Pengjie Zhang +5
Velocity fields in the cosmic web are fundamental to structure formation but remain difficult to observe directly beyond the linear regime. Here we present observational evidence t…
Measuring the Hubble constant with coalescences of binary neutron star and neutron star-black hole: bright sirens \& dark sirens
Jiming Yu, Zhengyan Liu, Xiaohu Yang +4
The observations of gravitational wave (GW) provide us a new probe to study the universe. GW events can be used as standard sirens if their redshifts are measured. Normally, starda…
Nonlinearities in modified gravity cosmology. II. Impacts of modified gravity on the halo properties
Youcai Zhang, Pengjie Zhang, Xiaohu Yang +1
The statistics of dark matter halos is an essential component of understanding the nonlinear evolution in modified gravity cosmology. Based on a series of modified gravity N-body s…
Nonlinearities in modified gravity cosmology I: signatures of modified gravity in the nonlinear matter power spectrum
Weiguang Cui, Pengjie Zhang, Xiaohu Yang
A large fraction of cosmological information on dark energy and gravity is encoded in the nonlinear regime. Precision cosmology thus requires precision modeling of nonlinearities i…