Type Ia supernovae high-velocity features

'High-velocity features' (HVFs) are spectral features in Type Ia supernovae (SNe Ia) that have minima indicating significantly higher (by greater than about 6000km/s) velocities...高速特征（High-velocity features，HVFs）是Ia型超新星（Type Ia supernovae，SNe Ia）中的光谱特征，其光谱极小值对应的速度显著更高（高出约6000km/s以上）……