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Theoretical Light Curves for Type Ia Supernovae and Determination of the Hubble Constant

Published online by Cambridge University Press:  25 May 2016

Koichi Iwamoto  and
Ken'Ichi Nomoto
Koichi Iwamoto
Affiliation:
Department of Astronomy, University of Tokyo Yayoi 2-11-16, Bunkyo ward, Tokyo 113, JAPAN
Ken'Ichi Nomoto
Affiliation:
Department of Astronomy, University of Tokyo Yayoi 2-11-16, Bunkyo ward, Tokyo 113, JAPAN

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The large luminosity (MV ≈ −19 ∼ −20) and the homogeneity in light curves and spectra of Type Ia supernovae(SNe Ia) have led to their use as distance indicators ultimately to determine the Hubble constant (H0). However, an increasing number of the observed samples from intermediate- and high-z (z ∼ 0.1 − 1) SN Ia survey projects(Hamuy et al. 1996, Perlmutter et al. 1997) have shown that there is a significant dispersion in the maximum brightness (∼ 0.4 mag) and the brighter-slower correlation between the brightness and the postmaximum decline rate, which was first pointed out by Phillips(1993). By taking the correlation into account, Hamuy et al.(1996) gave an estimate of H0 within the error bars half as much as previous ones.

Type
I. Cosmological Parameters, H0, q0, Ω0 and Λ
Information
Symposium - International Astronomical Union , Volume 183: Cosmological Parameters and the Evolution of the Universe , 1999 , pp. 68
Copyright
Copyright © Kluwer 1999 

References

Hamuy, M. et al., 1996, AJ 112, 2398.Google Scholar
Iwamoto, K., 1997, , .Google Scholar
Iwamoto, K. et al., 1998, in preparation Google Scholar
Perlmutter, S. et al., 1997, ApJ 483, 565.Google Scholar
Phillips, M.M. 1993, ApJ 413, L105.Google Scholar