2016/07/31 by M. R. Setare, F. Felegary, F. Darabi
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology #Cosmology and Gravitation Theories #Dark energy #Friedmann–Lemaître–Robertson–Walker metric #Galaxies: Formation, Evolution, Phenomena #Geometry #Lambda #Mathematical physics #Mathematics #Metric expansion of space #Physics #Quantum mechanics #Scalar (mathematics) #Scalar field #Scale factor (cosmology) #Tachyon #gr-qc
paper · pdf · doi:10.1016/j.physletb.2017.06.039
published as Physics Letters B, 772, 70 (2017) · 14 pages, 15 figures, revision
openalex publication_date 2017/06/17 · arxiv created 2017/06/28 · arxiv updated 2017/08/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the tachyon scalar field model in flat FRW cosmology with the particular potential ϕ−2 and the scale factor behavior a(t)=tn. We consider the spherical collapse model and investigate the effects of the tachyon scalar field on the structure formation in flat FRW universe. We calculate δc(zc), λ(zc), ξ(zc), ΔV(zc), log[νf(ν)] and log[n(k)] for the tachyon scalar field model and compare the results with the results of EdS model and ΛCDM model. It is shown that in the tachyon scalar field model the structure formation may occur earlier, in comparison to the other models.