2014/04/03 by Wei Li, Lixin Xu, Li, Wei +1
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Quantum Chromodynamics and Particle Interactions #astro-ph.CO
paper · pdf · doi:10.48550/arxiv.1404.1855
openalex publication_date 2014/04/03 · arxiv created 2014/07/18 · arxiv updated 2014/07/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The nonlinear collapse for viscous generalized Chaplygin gas Model (VGCG) was analyzed in the framework of spherical top-hat collapse. As the VGCG and baryons are essential to form the large scale structure, we focused on their nonlinear collapse in this paper. We discussed the influence of model parameters α and ζ0 on the spherical collapse by varying their values and compare with ΛCDM. The results show that, for the VGCG model, smaller ζ0 and larger α make the structure formation earlier and faster, and the collapse curves of VGCG model is almost distinguished with the ΛCDM model when the model parameter α is less than 10-2.