标题： 特殊星系 NGC 128 的结构和运动学特性 显示英文标题

标题： Structure and kinematics of the peculiar galaxy NGC 128

摘要： 这是一项关于特殊S0星系NGC128的多波段测光和光谱研究。 我们展示了来自宽波段（B和R）和窄波段光学CCD测光、近红外（NIR）和远红外（FIR）观测、长缝光谱学以及法布里-珀罗干涉仪（CIGALE）的结果。 该星系的特殊花生状形态在光学和近红外波长下都被观察到。 恒星盘厚且扭曲（弧形弯曲），由于存在大量尘埃而沿主轴出现颜色不对称，通过与伴星系NGC127相互作用区域的NIR和FIR数据估算约为6×10^6 M_sun。 颜色图在整个星系中几乎均匀分布，但主轴有不对称性，并向中心方向有轻微梯度，表明存在一个更红的盘状成分。 H_alpha图像确实揭示了围绕中心存在一个倾斜的气体“盘”，其主轴指向伴星系NGC127。 长缝和CIGALE数据显示，在视线方向上，存在一个反向旋转且大约倾斜50度的盘状气体组件。 内区气体盘的质量约为2.7×10^4 M_sun。 恒星速度场在推导出的旋转曲线的最后测量点之前是圆柱形的，而速度弥散剖面对于S0星系来说是典型的，但在短轴上表现出扩展的恒定行为。 显示英文摘要

摘要： This is a multiband photometric and spectroscopic study of the peculiar S0 galaxy NGC128. We present results from broad (B and R) and narrow band optical CCD photometry, near (NIR) and far (FIR) infrared observations, long slit spectroscopy, and Fabry-Perot interferometry (CIGALE). The peculiar peanut shape morphology of the galaxy is observed both at optical and near-infrared wavelengths. The stellar disk is thick and distorted (arc-bended), with a color asymmetry along the major axis due to the presence of a large amount of dust, estimated through NIR and FIR data of ~6x10^6 M_sun, in the region of interaction with the companion galaxy NGC127. The color maps are nearly uniform over the whole galaxy, but for the major axis asymmetry, and a small gradient toward the center indicating the presence of a redder disk-like component. The H_alpha image indeed reveals the existence of a tilted gaseous ``disk'' around the center, oriented with the major axis toward the companion galaxy NGC127. Long slit and CIGALE data confirm the presence of gas in a disk-like component counter-rotating and inclined approximately of 50 deg. to the line of sight. The mass of the gas disk in the inner region is ~2.7x10^4 M_sun. The stellar velocity field is cylindrical up to the last measured points of the derived rotation curves, while the velocity dispersion profiles are typical for an S0 galaxy, but for an extended constant behaviour along the minor axis.