Spectropolarimetry of SN 2001el in NGC 1448: Asphericity of a Normal Type Ia Supernova*

  title={Spectropolarimetry of SN 2001el in NGC 1448: Asphericity of a Normal Type Ia Supernova*},
  author={Lifan Wang and Dietrich Baade and P. Hoeflich and Alexei M. Khokhlov and J. Craig Wheeler and Daniel N. Kasen and Peter E. Nugent and Claes Fransson and Peter Lundqvist},
  journal={The Astrophysical Journal},
High-quality spectropolarimetry (range 417-860 nm; spectral resolution 1.27 nm and 0.265 nm pixel-1) of the Type Ia supernova (SN Ia) 2001el was obtained with the ESO Very Large Telescope Melipal (+FORS1) at five epochs. The spectra a week before maximum and around maximum indicate photospheric expansion velocities of about 10,000 km s-1. Prior to optical maximum, the linear polarization of the continuum was ≈0.2%-0.3% with a constant position angle, showing that SN 2001el has a well-defined… Expand

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