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On the High--Velocity Ejecta of the Type Ia Supernova 1994D
release_ltd64dcdlbhuhcnlzmxwrya7dm
by
K. Hatano,
D. Branch,
A. Fisher,
E. Baron,
A. V.
Filippenko
Released
as a article
.
1999
Abstract
Synthetic spectra generated with the parameterized supernova
synthetic-spectrum code SYNOW are compared to spectra of the Type Ia SN 1994D
that were obtained before the time of maximum brightness. Evidence is found for
the presence of two-component Fe II and Ca II features, forming in high
velocity (> 20,000 ) and lower velocity (< 16,000 ) matter.
Possible interpretations of these spectral splits, and implications for using
early--time spectra of SNe Ia to probe the metallicity of the progenitor white
dwarf and the nature of the nuclear burning front in the outer layers of the
explosion, are discussed.
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astro-ph/9903333v2
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