Spectral analysis of the 91bg-like Type Ia SN 2005bl: low luminosity, low velocities, incomplete burning

• Published in: Monthly notices of the Royal Astronomical Society Vol. 399; no. 3; pp. 1238 - 1254
• Main Authors: Hachinger, Stephan, Mazzali, Paolo A., Taubenberger, Stefan, Pakmor, Rüdiger, Hillebrandt, Wolfgang
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.11.2009; Wiley-Blackwell; Oxford University Press
• Subjects: Astronomy; Astrophysics; Earth, ocean, space; Exact sciences and technology; radiative transfer; Spectrum analysis; Supernovae; supernovae: general; techniques: spectroscopic; Theory; supernovae: general; radiative transfer; techniques: spectroscopic; Type I supernova; Detonations; Nucleosynthesis; Luminosity; Standard model; Abundance; Radiative transfer; Kinetic energy; Spectral analysis

The properties of underluminous Type Ia supernovae (SNe Ia) of the 91bg subclass have yet to be theoretically understood. Here, we take a closer look at the structure of the dim SN Ia 2005bl. We infer the abundance and density profiles needed to reproduce the observed spectral evolution between −6 d...