The Reddening-Free Decline Rate Versus Luminosity Relationship for Type Ia Supernovae

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dc.creatorPhillips, M. M.
dc.creatorLira, P.
dc.creatorSuntzeff, N. B.
dc.creatorSchommer, R. A.
dc.creatorHamuy, M.
dc.creatorMaza, J.
dc.date1999-07-05
dc.date.accessioned2026-07-07T10:51:32Z
dc.date.available2026-07-07T10:51:32Z
dc.descriptionWe develop a method for estimating the host galaxy dust extinction for type Ia supernovae based on an observational coincidence first noted by Lira (1995), who found that the B-V evolution during the period from 30-90 days after V maximum is remarkably similar for all events, regardless of light curve shape. This fact is used to calibrate the dependence of the B(max)-V(max) and V(max)-I(max) colors on the light curve decline rate parameter delta-m15, which can, in turn, be used to separately estimate the host galaxy extinction. Using these methods to eliminate the effects of reddening, we reexamine the functional form of the decline rate versus luminosity relationship and provide an updated estimate of the Hubble constant of Ho = 63.3 +- 2.2(internal) +- 3.5(external) km/s/Mpc.
dc.description32 pages, 10 figures, AJ 1999 in press
dc.identifierhttps://arxiv.org/abs/astro-ph/9907052
dc.identifierhttp://arxiv.org/abs/astro-ph/9907052
dc.identifierAstron.J.118:1766,1999
dc.identifierdoi:10.1086/301032
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/184853
dc.subjectAstrophysics
dc.titleThe Reddening-Free Decline Rate Versus Luminosity Relationship for Type Ia Supernovae
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