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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.
Abstract
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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