The asymmetric explosion of type Ia supernovae as seen from near-infrared observations'

Kentaro Motohara, Keiichi Maeda, Christopher L. Gerardy, Ken'ichi Nomoto, Masaomi Tanaka, Nozomu Tominaga, Takuya Ohkubo, Paolo A. Mazzali, Robert A. Fesen, Peter Höflich, J. Craig Wheeler

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53 Citations (Scopus)

Abstract

We present near-infrared spectra of late-phase (>200 days) Type Ia supernovae (SNe Ia) taken at the Subaru Telescope. The [Fe II] line of SN 2003hv shows a clear flat-topped feature, while that of SN 2005W shows a less prominent flatness. In addition, a large shift in their line center, varying from -3000 to 1000 km s-1 with respect to the host galaxies, is seen. Such a shift suggests the occurrence of an off-center, nonspherical explosion in the central region and provides important, new constraints on the explosion models of SNe la.

Original languageEnglish
Pages (from-to)L101-L104
JournalAstrophysical Journal
Volume652
Issue number2 II
DOIs
Publication statusPublished - 2006 Dec 1
Externally publishedYes

Keywords

  • Infrared: stars
  • Supernovae: general
  • Supernovae: individual (SN 2003du, SN 2003hv, SN 2005W)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Motohara, K., Maeda, K., Gerardy, C. L., Nomoto, K., Tanaka, M., Tominaga, N., Ohkubo, T., Mazzali, P. A., Fesen, R. A., Höflich, P., & Wheeler, J. C. (2006). The asymmetric explosion of type Ia supernovae as seen from near-infrared observations'. Astrophysical Journal, 652(2 II), L101-L104. https://doi.org/10.1086/509919