Apparent velocity measurements of DA WDs

We measure apparent velocities (v_app_) of the H{alpha} and H{beta} Balmer line cores for 449 non-binary thin disk normal DA white dwarfs (WDs) using optical spectra taken for...我们利用所采集的光学光谱，对449颗非双星薄盘正常DA型白矮星（DA white dwarf）的Hα与Hβ巴尔默谱线核的视速度（apparent velocity，v_app）进行了测量。