K CORRECTIONS FOR TYPE IA SUPERNOVAE AND A TEST FOR SPATIAL VARIATION OF THE HUBBLE CONSTANT The Supernova Cosmology Project: II
نویسندگان
چکیده
Cross-filter K corrections for a sample of “normal” Type Ia supernovae (SNe) have been calculated for a range of epochs. With appropriate filter choices, the combined statistical and systematic K correction dispersion of the full sample lies within 0.05 mag for redshifts z < 0.7. This narrow dispersion of the calculated K correction allows the Type Ia to be used as a cosmological probe. We use the K corrections with observations of seven Presented by A. Kim, e-mail address:[email protected] Current address: CNRS-IN2P3, Paris Current address: Anglo-Australian Observatory 2 SNe at redshifts 0.3 < z < 0.5 to bound the possible difference between the locally measured Hubble constant (HL) and the true cosmological Hubble constant (H0).
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