On the high-velocity ejecta of the Type Ia supernova SN 1994D

被引：64

作者：

Hatano, K ^{[1
]}

Branch, D

Fisher, A

Baron, E

Filippenko, AV

机构：

[1] Univ Oklahoma, Dept Phys & Astron, Norman, OK 73019 USA

[2] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

来源：

ASTROPHYSICAL JOURNAL | 1999年 / 525卷 / 02期

基金：

美国国家科学基金会;

关键词：

radiative transfer; stars : winds; outflows; supernovae : individual (SN 1994D);

D O I：

10.1086/307947

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Synthetic spectra generated with the parameterized supernova synthetic-spectrum code SYNOW are compared with 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 (greater than or equal to 20,000 km s(-1)) and lower velocity (less than or equal to 16,000 km s(-1)) matter. Possible interpretations of these spectral splits, and implications for using early-time spectra of Type Ia supernovae 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.

引用

页码：881 / 885

页数：5

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