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

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

2006-10-11

arxiv.org/abs/astro-ph/0610303v2

Astrophys.J.652:L101-L104,2006

Astronomy and Astrophysics

Astrophysics

8 pages, 10 figures. Accepted for publication in the Astrophysical Journal (Letters); some corrections done

Scientific paper

10.1086/509919

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 a clear 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 the occurrence of an off-center, non-spherical explosion in the central region, and provides important, new constraints on the explosion models of SNe Ia.

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