Circumstellar Material in Type Ia Supernovae via Sodium Absorption Features

A. Sternberg; A. Gal‐Yam; Joshua D. Simon; Douglas C. Leonard; R. Quimby; M. M. Phillips; N. Morrell; I. B. Thompson; Inese I. Ivans; J. L. Marshall; Alexei V Filippenko; Geoffrey W. Marcy; J. S. Bloom; F. Patat; R. J. Foley; David Yong; Bryan E. Penprase; Daniel J. Beeler; Carlos Allende Prieto; Guy S. Stringfellow

doi:10.1126/science.1203836

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Abstract

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Most of the progenitors of type Ia supernovae in nearby spiral galaxies may be white dwarf−normal star binary systems.

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