Long slit spectroscopy in M31

We present new optical long-slit data along six position angles of the bulge region of M31. We derive accurate stellar and gas kinematics reaching 5-arcmin from the center,...本研究提供了沿仙女座星系（M31）核球区域六个方位角的新型光学长缝光谱数据。我们获取了覆盖至距星系中心5角分范围的高精度恒星与气体运动学参数……