SN 2017hpa: A Nearby Carbon-rich Type Ia Supernova with a Large Velocity Gradient

  title={SN 2017hpa: A Nearby Carbon-rich Type Ia Supernova with a Large Velocity Gradient},
  author={Xiangyun Zeng and Xiaofeng Wang and Ali Esamdin and Craig Pellegrino and WeiKang Zheng and Jujia Zhang and Jun Mo and Wenxiong Li and D. Andrew Howell and Alexei V. Filippenko and Han Lin and Thomas G. Brink and Edward A. Baron and Jamison Burke and James M. DerKacy and Curtis McCully and Daichi Hiramatsu and Griffin Hosseinzadeh and Benjamin T. Jeffers and Timothy W. Ross and Benjamin E. Stahl and Samantha Stegman and Stefano Valenti and Lifan Wang and Danfeng Xiang and Jicheng Zhang and Tianmeng Zhang},
  journal={The Astrophysical Journal},
We present extensive, well-sampled optical and ultraviolet photometry and optical spectra of the Type Ia supernova (SN Ia) 2017hpa. The light curves indicate that SN 2017hpa is a normal SN Ia with an absolute peak magnitude of −19.12 ± 0.11 mag and a postpeak decline rate Δm 15(B) = 1.02 ± 0.07 mag. According to the quasi-bolometric light curve, we derive a peak luminosity of 1.25 × 1043 erg s−1 and a 56Ni mass of 0.63 ± 0.02 M ⊙. The spectral evolution of SN 2017hpa is similar to that of… Expand
1 Citations
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