The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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The effects of circumstellar medium on Type Ic supernova light curve and color evolution and implications for LSQ14efd

  • Jin, Harim (Department of Physics and Astronomy, Seoul National University) ;
  • Yoon, Sung-Chul (Department of Physics and Astronomy, Seoul National University)
  • Published : 2019.10.14
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Abstract

A bright post-breakout emission was detected for a Type Ic supernova (SN Ic) LSQ14efd, which was among the first for SNe Ic. To explain the early-time light curve and color evolution, the effects of the circumstellar medium (CSM) are investigated. Four main parameters, CSM mass, CSM radius, nickel distribution, and explosion energy, are systematically explored in multi-group radiation hydrodynamics simulations, STELLA. Matching the model light curves and color evolution with the observation, we could constrain the parameter space and find out the best fit models. Our results imply that the progenitor suffered a strong mass loss shortly before the explosion and had a massive CSM of ~0.1 M⊙.

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