A WC/WO star exploding within an expanding carbon–oxygen–neon nebula

  title={A WC/WO star exploding within an expanding carbon–oxygen–neon nebula},
  author={A. Gal-Yam and Rachel J. Bruch and Steve Schulze and Y. Yang and Daniel A. Perley and Ido Irani and Jesper Sollerman and Erik C. Kool and Maayane T. Soumagnac and Ofer Yaron and Nora Linn Strotjohann and E. Zimmerman and Cristina Barbarino and Shrinivas R. Kulkarni and Mansi M. Kasliwal and K. De and Y. Yao and Christoffer U. Fremling and L. L. Yan and Eran. O. Ofek and C. Fransson and Alexei V. Filippenko and W. K. Zheng and Thomas G. Brink and C. M. Copperwheat and Ryan J. Foley and J. M. Brown and Matthew R. Siebert and Giorgos Leloudas and Antonio Cabrera-Lavers and David Garc{\'i}a-{\'A}lvarez and A. Marante-Barreto and Sara Frederick and T. Hung and J. Craig Wheeler and J{\'o}zsef Vink{\'o} and Biju Thomas and Matthew J. Graham and Dmitry A. Duev and Andrew J. Drake and Richard Dekany and Eric C. Bellm and Ben Rusholme and David L. Shupe and Igor Andreoni and Yashvi Sharma and Reed L. Riddle and Jan van Roestel and Neven Knezevic},
The final fate of massive stars, and the nature of the compact remnants they leave behind (black holes and neutron stars), are open questions in astrophysics. Many massive stars are stripped of their outer hydrogen envelopes as they evolve. Such Wolf–Rayet stars 1 emit strong and rapidly expanding winds with speeds greater than 1,000 kilometres per second. A fraction of this population is also helium-depleted, with spectra dominated by highly ionized emission lines of carbon and oxygen (types… 

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Type Ibn supernovae (SNe Ibn) show signatures of strong interaction between the SN ejecta and hydrogen-poor circumstellar matter (CSM). Deriving the ejecta and CSM properties of SNe Ibn provides a

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With the advent of new wide-field, high-cadence optical transient surveys, our understanding of the diversity of core-collapse supernovae has grown tremendously in the last decade. However, the

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