Metamorphosis of SN 2014C: Delayed Interaction Between a Hydrogen Poor Core-collapse Supernova and a Nearby Circumstellar Shell

@article{Milisavljevic2015MetamorphosisOS,
  title={Metamorphosis of SN 2014C: Delayed Interaction Between a Hydrogen Poor Core-collapse Supernova and a Nearby Circumstellar Shell},
  author={D. Milisavljevic and R. Margutti and A. Kamble and D. Patnaude and J. Raymond and J. Eldridge and W. Fong and M. Bietenholz and P. Challis and R. Chornock and M. Drout and C. Fransson and R. Fesen and J. Grindlay and R. Kirshner and R. Lunnan and J. Mackey and G. Miller and J. Parrent and N. Sanders and A. Soderberg and B. Zauderer},
  journal={arXiv: High Energy Astrophysical Phenomena},
  year={2015}
}
We present optical observations of supernova SN 2014C, which underwent an unprecedented slow metamorphosis from H-poor type Ib to H-rich type IIn over the course of one year. The observed spectroscopic evolution is consistent with the supernova having exploded in a cavity before encountering a massive shell of the progenitor star's stripped hydrogen envelope. Possible origins for the circumstellar shell include a brief Wolf-Rayet fast wind phase that overtook a slower red supergiant wind… Expand
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