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The Silicon and Calcium High-Velocity Features in Type Ia Supernovae from Early to Maximum Phases
Xulin Zhao, Xiaofeng Wang, Keiichi Maeda +7
The high-velocity features (HVFs) in optical spectra of type Ia supernovae (SNe Ia) are examined with a large sample including very early-time spectra (e.g., t < -7 days). Multiple…
SN 2013ej in M74: A Luminous and Fast-declining Type II-P Supernova
Fang Huang, Xiaofeng Wang, Jujia Zhang +7
We present extensive ultraviolet, optical, and near-infrared observations of the type IIP supernova (SN IIP) 2013ej in the nearby spiral galaxy M74. The multicolor light curves, sp…
Massive stars exploding in a He-rich circumstellar medium. IV. Transitional Type Ibn Supernovae
A. Pastorello, S. Benetti, P. J. Brown +30
We present ultraviolet, optical and near-infrared data of the Type Ibn supernovae (SNe) 2010al and 2011hw. SN 2010al reaches an absolute magnitude at peak of M(R) = -18.86 +- 0.21.…