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

doi:10.1086/509919

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

Research output: Contribution to journal › Article

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 language	English
Pages (from-to)	L101-L104
Journal	Astrophysical Journal
Volume	652
Issue number	2 II
DOIs	https://doi.org/10.1086/509919
Publication status	Published - 2006 Dec 1
Externally published	Yes

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

The asymmetric explosion of type Ia supernovae as seen from near-infrared observations'. / Motohara, Kentaro; Maeda, Keiichi; Gerardy, Christopher L.; Nomoto, Ken'ichi; Tanaka, Masaomi; Tominaga, Nozomu; Ohkubo, Takuya; Mazzali, Paolo A.; Fesen, Robert A.; Höflich, Peter; Wheeler, J. Craig.

In: Astrophysical Journal, Vol. 652, No. 2 II, 01.12.2006, p. L101-L104.

Research output: Contribution to journal › Article

Motohara, Kentaro ; Maeda, Keiichi ; Gerardy, Christopher L. ; Nomoto, Ken'ichi ; Tanaka, Masaomi ; Tominaga, Nozomu ; Ohkubo, Takuya ; Mazzali, Paolo A. ; Fesen, Robert A. ; Höflich, Peter ; Wheeler, J. Craig. / The asymmetric explosion of type Ia supernovae as seen from near-infrared observations'. In: Astrophysical Journal. 2006 ; Vol. 652, No. 2 II. pp. L101-L104.

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AU - Motohara, Kentaro

AU - Maeda, Keiichi

AU - Gerardy, Christopher L.

AU - Nomoto, Ken'ichi

AU - Tanaka, Masaomi

AU - Tominaga, Nozomu

AU - Ohkubo, Takuya

AU - Mazzali, Paolo A.

AU - Fesen, Robert A.

AU - Höflich, Peter

AU - Wheeler, J. Craig

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AB - 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.

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