2006年
Aspherical ejecta of Type Ia supernovae inferred from high velocity features
ORIGIN OF MATTER AND EVOLUTION OF GALAXIES
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- 巻
- 847
- 号
- 開始ページ
- 485
- 終了ページ
- +
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1063/1.2234467
- 出版者・発行元
- AMER INST PHYSICS
Spectral synthesis in 3-dimensional space for the early phase spectra of Type la supernovae is presented. In particular, the high velocity absorption features that ubiquitously exist at the earliest epochs (similar to 10 days before maximum light) are investigated. The increasing number of early spectra available allows statistical study on the geometry of the ejecta. The observed diversity in the strength of the high velocity features (HVFs) can be reproduced through a "covering factor", which represents the fraction of the projected photosphere that is concealed by high velocity material. Various geometrical models involving high velocity material with a clumpy structure or a thick torus can naturally account for the observed statistics of HVFs. Models with 1 or 2 blobs, as well as a thin torus or disk-like enhancement seem to be unlikely as a standard situation.
- リンク情報
- ID情報
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- DOI : 10.1063/1.2234467
- ISSN : 0094-243X
- Web of Science ID : WOS:000239488100093