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Open Access Publications from the University of California

On the hydrogen emission from the type Ia supernova 2002ic

  • Author(s): Wang, Lifan;
  • Baade, Dietrich;
  • Hoflich, Peter;
  • Wheeler, J. Craig;
  • Kawabata, Koji;
  • Nomoto, Ken'ichi
  • et al.

The discovery of SN 2002ic by the Supernova Factory and the subsequent spectroscopic studies have led to the surprising finding that SN 2002ic is a type Ia supernova with strong ejecta-circumstellar interaction. Here we show that nearly 1 year after the explosion the supernova has become fainter overall, but the H-alpha emission has brightened and broadened dramatically compared to earlier observations. We have obtained spectropolarimetry data which show that the hydrogen-rich matter is highly aspherically distributed. These observations suggest that the supernova exploded inside a dense, clumpy, disk-like circumstellar environment.

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