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arxiv: astro-ph/9609059 · v1 · submitted 1996-09-07 · 🌌 astro-ph

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The Absolute Luminosities of the Calan/Tololo Type Ia Supernovae

Mario Hamuy (CTIO , University of Arizona) , M.M. Phillips (CTIO) , Robert A. Schommer (CTIO) , Nicholas B. Suntzeff (CTIO) Jos\'e Maza (University of Chile) , R. Avil\'es (CTIO)
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classification 🌌 astro-ph
keywords absoluteraterelationbandcalancurvedeclinelight
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We examine the absolute luminosities of 29 SNe Ia in the Calan/Tololo survey. We confirm a relation between the peak luminosity of the SNe and the decline rate as measured by the light curve, as suggested by Phillips (1993). We derive linear slopes to this magnitude-decline rate relation in BV(I)kc colors, using a sample with Bmax-Vmax < 0.2 mag. The scatter around this linear relation (and thus the ability to measure SNe Ia distances) ranges from 0.13 mag (in the I band) to 0.17 mag (in the B band). We also find evidence for significant correlations between the absolute magnitudes or the decline rate of the light curve, and the morphological type of the host galaxy.

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Cited by 1 Pith paper

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