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

Authors

Kentaro Motohara, University of Tokyo
Keiichi Maeda, University of Tokyo
Christopher L. Gerardy, Blackett Laboratory
Ken'ichi Nomoto, University of Tokyo
Masaomi Tanaka, University of Tokyo
Nozomu Tominaga, University of Tokyo
Takuya Ohkubo, University of Tokyo
Paolo A. Mazzali, University of Tokyo
Robert A. Fesen, Dartmouth CollegeFollow
Peter Hoflich, University of Texas
J. Craig Wheeler, University of Texas

Document Type

Article

Publication Date

11-6-2006

Publication Title

The Astrophysical Journal

Department

Department of Physics and Astronomy

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 Ia.

DOI

10.1086/509919

Original Citation

Kentaro Motohara et al 2006 ApJ 652 L101

Dartmouth Digital Commons Citation

Motohara, Kentaro; Maeda, Keiichi; Gerardy, Christopher L.; Nomoto, Ken'ichi; Tanaka, Masaomi; Tominaga, Nozomu; Ohkubo, Takuya; Mazzali, Paolo A.; Fesen, Robert A.; Hoflich, Peter; and Wheeler, J. Craig, "The Asymmetric Explosion of Type Ia Supernovae as Seen from Near-Infrared Observations" (2006). Dartmouth Scholarship. 3389.
https://digitalcommons.dartmouth.edu/facoa/3389