TY - JOUR
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
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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U2 - 10.1086/509919
DO - 10.1086/509919
M3 - Article
AN - SCOPUS:33845890339
VL - 652
SP - L101-L104
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 2 II
ER -