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Supernova Explosions: Lessons from Spectropolarimetry
Lifan Wang
Supernova can be polarized by an asymmetry in the explosion process, an off-center source of illumination, scattering in an envelope distorted by rotation or a binary companion, or…
On The Hydrogen Emission From The Type Ia Supernova 2002ic
Lifan Wang, Dietrich Baade, Peter Hoeflich +3
The discovery of SN 2002ic and subsequent spectroscopic studies have led to the surprising finding that SN 2002ic is a Type Ia supernova with strong ejecta-circumstellar interactio…
Spectroscopic detection of Type Ia Supernovae in the Sloan Digital Sky Survey
Darren S. Madgwick, Paul Hewett, Daniel Mortlock +1
We present the results of a novel new search of the first data-release from the Sloan Digital Sky Survey (SDSS-DR1) for the spectra of supernovae. The use of large spectroscopic ga…
Could There Be A Hole In Type Ia Supernovae?
Daniel Kasen, Peter Nugent, R. C. Thomas +1
In the favored progenitor scenario, Type Ia supernovae arise from a white dwarf accreting material from a non-degenerate companion star. Soon after the white dwarf explodes, the ej…
SN 2003du: Signatures of the Circumstellar Environment in a Normal Type Ia Supernova?
C. L. Gerardy, P. Hoeflich, R. A. Fesen +6
We present observations of the Type Ia supernova 2003du and report the detectionof an unusual, high-velocity component in the Ca II infrared triplet, similar tofeatures previously…
Spectropolarimetry of SN 2001el in NGC 1448: Asphericity of a Normal Type Ia Supernova
Lifan Wang, Dietrich Baade, Peter Hoeflich +6
High-quality spectropolarimetry (range 417-860 nm; spectral resolution 1.27 nm and 0.265 nm/pixel) of the SN Ia 2001el were obtained with the ESO Very Large Telescope Melipal (+ FO…