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 › peer-review

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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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 › peer-review

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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title = "The asymmetric explosion of type Ia supernovae as seen from near-infrared observations'",

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.",

keywords = "Infrared: stars, Supernovae: general, Supernovae: individual (SN 2003du, SN 2003hv, SN 2005W)",

author = "Kentaro Motohara and Keiichi Maeda and Gerardy, {Christopher L.} and Ken'ichi Nomoto and Masaomi Tanaka and Nozomu Tominaga and Takuya Ohkubo and Mazzali, {Paolo A.} and Fesen, {Robert A.} and Peter H{\"o}flich and Wheeler, {J. Craig}",

note = "Funding Information: We thank all the staff at the Subaru Observatory for their excellent support of the observations. This work has been supported in part by the Grants-in-Aid for Scientific Research (17030005, 17033002, 18104003, and 18540231) and the 21st Century COE Program (QUEST) from the JSPS and MEXT of Japan. C. L. G. is supported by UK PPARC grant PPA/G/S/ 2003/00040. J. C. W. is supported by NSF grant AST-0406740.",

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doi = "10.1086/509919",

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T1 - The asymmetric explosion of type Ia supernovae as seen from near-infrared observations'

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

N1 - Funding Information: We thank all the staff at the Subaru Observatory for their excellent support of the observations. This work has been supported in part by the Grants-in-Aid for Scientific Research (17030005, 17033002, 18104003, and 18540231) and the 21st Century COE Program (QUEST) from the JSPS and MEXT of Japan. C. L. G. is supported by UK PPARC grant PPA/G/S/ 2003/00040. J. C. W. is supported by NSF grant AST-0406740.

PY - 2006/12/1

Y1 - 2006/12/1

N2 - 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.

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.

KW - Infrared: stars

KW - Supernovae: general

KW - Supernovae: individual (SN 2003du, SN 2003hv, SN 2005W)

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DO - 10.1086/509919

M3 - Article

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VL - 652

SP - L101-L104

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2 II

ER -

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

Abstract

Keywords

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