Determination of the Hubble Constant Using a Two-Parameter Luminosity Correction for Type Ia Supernovae

Journal Article · Mon Nov 01 04:00:00 EST 1999 · Astrophysical Journal

DOI:https://doi.org/10.1086/307883· OSTI ID:20216192

Tripp, Robert; Branch, David

In this paper, we make a comprehensive determination of the Hubble constant H{sub 0} by using two parameters--the B-V color and the rate of decline {delta}m{sub 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 {chi}{sup 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{sub 0} =62 km s{sup -1} Mpc{sup -1} and a standardized absolute magnitude of -19.46. The sensitivity of H{sub 0} to a metallicity dependence of the Cepheid-determined distances is investigated. The total uncertainty {delta}H{sub 0}, dominated by uncertainties in the primary distance indicators, is estimated to be 5 km s{sup -1} Mpc{sup -1}. (c) (c) 1999. The American Astronomical Society.

• OSTI ID: 20216192
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 525; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CALIBRATION
CEPHEIDS
EXPERIMENTAL DATA
HUBBLE EFFECT
LUMINOSITY
RED SHIFT
SUPERNOVAE