Aspherical ejecta of type Ia supernovae inferred from high velocity features

M. Tanaka, P. A. Mazzali, K. Maeda, K. Nomoto

研究成果: Conference contribution

抄録

Spectral synthesis in 3-dimensional space for the early phase spectra of Type Ia supernovae is presented. In particular, the high velocity absorption features that ubiquitously exist at the earliest epochs (∼ 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.

本文言語English
ホスト出版物のタイトルORIGIN OF MATTER AND EVOLUTION OF GALAXIES
ホスト出版物のサブタイトルInternational Symposium on Origin of Matter and Evolution of Galaxies 2005: New Horizon of Nuclear Astrophysics and Cosmology
ページ485-487
ページ数3
DOI
出版ステータスPublished - 2006 12 1
外部発表はい
イベントORIGIN OF MATTER AND EVOLUTION OF GALAXIES: International Symposium on Origin of Matter and Evolution of Galaxies 2005: New Horizon of Nuclear Astrophysics and Cosmology - Tokyo, Japan
継続期間: 2005 11 82005 11 11

出版物シリーズ

名前AIP Conference Proceedings
847
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Other

OtherORIGIN OF MATTER AND EVOLUTION OF GALAXIES: International Symposium on Origin of Matter and Evolution of Galaxies 2005: New Horizon of Nuclear Astrophysics and Cosmology
CountryJapan
CityTokyo
Period05/11/805/11/11

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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