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

2006/10/31 by Kentaro Motohara, K. Motohara, K. Maeda +16 · 2 citations
Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Cosmology #Flatness (cosmology) #Galaxy #Gamma-ray bursts and supernovae #Geometry #Infrared #Line (geometry) #Physics #Pulsars and Gravitational Waves Research #Spectral line #Subaru Telescope #Supernova #Telescope #astro-ph

paper · pdf · doi:10.1086/509919

published as Astrophys.J.652:L101-L104,2006 · 8 pages, 10 figures. Accepted for publication in the Astrophysical Journal (Letters); some corrections done

openalex publication_date 2006/11/06 · arxiv created 2006/11/24 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

Citations

• Measurements of Ω and Λ from 42 High‐Redshift Supernovae
• Off‐Center Carbon Ignition in Rapidly Rotating, Accreting Carbon‐Oxygen White Dwarfs
• Late Light Curves of Type Ia Supernovae
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Type Ia Supernova Explosion Models

Cited by

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