The Asymmetric Explosion of Type Ia Supernovae as Seen from Near-Infrared Observations | Zendy

Kentaro Motohara | Zendy; Keiichi Maeda | Zendy; Christopher L. Gerardy | Zendy; K. Nomoto | Zendy; Masaomi Tanaka | Zendy; Nozomu Tominaga | Zendy; Takuya Ohkubo | Zendy; P. A. Mazzali | Zendy; Robert A. Fesen | Zendy; Peter Höflich | Zendy; J. C. Wheeler | Zendy

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The Asymmetric Explosion of Type Ia Supernovae as Seen from Near-Infrared Observations

Author(s) -

Kentaro Motohara,

Keiichi Maeda,

Christopher L. Gerardy,

K. Nomoto,

Masaomi Tanaka,

Nozomu Tominaga,

Takuya Ohkubo,

P. A. Mazzali,

Robert A. Fesen,

Peter Höflich,

J. C. Wheeler

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/509919

Subject(s) - supernova , physics , flatness (cosmology) , subaru telescope , astrophysics , infrared , spectral line , galaxy , line (geometry) , telescope , astronomy , cosmology , geometry , mathematics , spectrograph

We present near-infrared spectra of late phase (>200 d) Type Ia supernovae(SNe Ia) taken at the Subaru telescope. The [Fe II] line of SN 2003hv shows aclear flat-topped feature, while that of SN 2005W show less prominent flatness.In addition, a large shift in their line center, varying from -3000 to 1000(km/s) with respect to the host galaxies, is seen. Such a shift suggests theoccurrence of an off-center, non-spherical explosion in the central region, andprovides important, new constraints on the explosion models of SNe Ia.Comment: 8 pages, 10 figures. Accepted for publication in the Astrophysical Journal (Letters); some corrections don

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