1999/04/25 by R. Tripp, Robert D. Tripp, D. Branch +1 · 2 citations
Physics and Astronomy · #Astro and Planetary Science #Gamma-ray bursts and supernovae #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/307883
To appear in ApJ
arxiv created 1999/04/25 · openalex publication_date 1999/11/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
In this paper, we make a comprehensive determination of the Hubble constant H 0 by using two parameters—the B - V color and the rate of decline Δ m 15 —to simultaneously standardize the luminosities of all nearby Cepheid-calibrated Type Ia supernovae (SNe Ia) and those of a larger, more distant sample of 29 SNe Ia. Each group is treated in as similar a manner as possible in order to avoid systematic effects. A simultaneous χ 2 minimization yields a standardized absolute luminosity of the Cepheid-calibrated supernovae as well as the Hubble constant obtained from the more distant sample. With an adopted LMC distance modulus of 18.50, we find H 0 = 62 km s -1 Mpc -1 and a standardized absolute magnitude of -19.46. The sensitivity of H 0 to a metallicity dependence of the Cepheid-determined distances is investigated. The total uncertainty δ H 0 , dominated by uncertainties in the primary distance indicators, is estimated to be 5 km s -1 Mpc -1 .