2001/04/30 by Kenji Tomita · 7 citations
Physics and Astronomy · #Astrophysics #Astrophysics and Cosmic Phenomena #Constant (computer programming) #Cosmological constant #Cosmology #Dark energy #Gamma-ray bursts and supernovae #Homogeneous #Hubble's law #Local Void #Mechanics #Neutrino Physics Research #Physics #Statistical physics #Supernova #Theoretical physics #Type (biology) #Void (composites) #astro-ph
paper · pdf · doi:10.1143/ptp.106.929
published as Prog.Theor.Phys. 106 (2001) 929-939 · 12 pages, 6 figures, Accepted for publication in Prog. Theor. Phys. (Vol.106, No.5, 2001)
openalex publication_date 2001/11/01 · arxiv created 2001/11/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The data for type Ia supernovae obtained by the High-z SN Search Team and Supernova Cosmology Project are analyzed using inhomogeneous cosmological models with a local void on scales of about 200 Mpc, to derive the best-fit values of model parameters and the confidence contours. The χ2 fitting is found to be slightly better than that in homogeneous models. It is shown that (1) the best-fit values are most sensitive to the ratio R of the outer Hubble constant, H0II, to the inner Hubble constant, H0I, (2) the best-fit outer density parameter, Ω0II, and cosmological constant parameter, λ0II, are, respectively, increasing and decreasing functions of R, and (3) (Ω0II, λ0II) can be (1, 0) for R ≈0.8. Moreover, it is shown that these models are naturally consistent with the new supernova data (SN1997ff) with z = 1.7.