Internal Motions in NGC 5128
Internal Motions in NGC 5128
复制标题
NGC 5128 的内部运动
作者：
J. Sérsic
在过去的两年里，NGC 5128已经在博斯克阿雷格里（Córdoba天文台的天体物理分支）的154厘米反射器上用各种技术进行了观测。这些观测的目的是测量该星系中发射线和吸收线的径向速度场，以发现气体和恒星之间是否存在由发射线和吸收线分别表示的相对运动。先前关于这一课题的工作1 - 3没有给出明确的结果，因为很难获得同时显示适度色散的发射线和吸收线的充分曝光光谱。我在这里展示一些结果。
DURING the past 2 years, NGC 5128 has been observed with various techniques at the 154 cm reflector in Bosque Alegre (Astrophysical Branch of the Observatorio de Córdoba). The aim of these observations was to measure the radial velocity field for emission and absorption lines in this galaxy in order to find whether there is relative motion between gas and stars as represented by the emission and absorption lines respectively. Previous work on this subject1–3 has given no definite results because of the difficulty of getting well exposed spectra simultaneously showing emission and absorption lines with moderate dispersion. Here I present some results.