Optical emission from aspherical core-collapse supernovae

Masaomi Tanaka, Keiichi Maeda, Ken'ichi Nomoto, Paolo A. Mazzali, Nozomu Tominaga, Koji S. Kawabata, Takashi Hattori

研究成果: Conference contribution

抄録

Optical emission from supernovae (SNe) reflects physical properties of SNe, such as mass and kinetic energy of the ejecta and the ejected 56Ni mass, which are closely related to the central remnants, explosion scenarios and progenitor stars of SNe. Modelling of the optical emission has been done mostly under the assumption of spherical symmetry. In this paper, we present multidimensional modelling of optical emission using a multi-dimensional Monte-Carlo radiative fransfer code, SAMURAI (SupemovA MUlti-dimensional RAdlative fransfer code). We show that all the optical observations of SN 1998bw/GRB 980425, including the light curve and optical specfra at early and late phases, are consistent with polar-viewed radiation of the aspherical explosion model. The kinetic energy, which has been estimated to be 30 - 50 × 10 51 ergs by spherical models, can be reduced to 20 × 10 51 ergs. Such reduction of the kinetic energy is less effective for offaxis or less aspherical cases. As an observational test of SN asphericity, we also show our recent specfropolarimetric observations of Type Ic SN 2007gr with Subaru telescope. The data clearly indicate the difference in the distribution of the newly synthesized elements and the elements in the pre-explosion star

本文言語English
ホスト出版物のタイトルProbing Stellar Populations Out To The Distant Universe - Cefalu 2008 - Proceedings of the International Conference
ページ413-420
ページ数8
DOI
出版ステータスPublished - 2009
外部発表はい
イベントInternational Conference on Probing Stellar Populations Out To The Distant Universe, Cefalu 2008 - Cefalu, Sicily, Italy
継続期間: 2008 9 72008 9 19

出版物シリーズ

名前AIP Conference Proceedings
1111
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Other

OtherInternational Conference on Probing Stellar Populations Out To The Distant Universe, Cefalu 2008
CountryItaly
CityCefalu, Sicily
Period08/9/708/9/19

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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