Vertical population gradients in NGC 891. I.

We have measured vertical and radial stellar population gradients in NGC 891. We compare these gradients to those known for the Milky Way from studies of resolved stars. Optical...我们对NGC 891星系内恒星族群的垂直与径向梯度进行了测量。我们将此类梯度与通过分辨恒星研究得到的银河系已知梯度进行比对。光学……