标题： 孤立星系CIG 993的运动学 显示英文标题

标题： Kinematics of an isolated galaxy, CIG 993

摘要： 我们展示了对CIG 993的扫描法布里-珀罗干涉观测，这是一个明显孤立的明亮红外星系，同时表现出明亮的蓝色致密和沃尔夫-拉叶星系特征，以及高的恒星形成率。 我们的高分辨率H$\alpha$发射线观测使我们能够推导出径向速度场，以及速度弥散$\sigma$，以及星系的速度场残差。 这个星系表现出几个动力学成分。 一方面，速度场中检测到的速度梯度可以与旋转盘相关联——与之前分辨率较低的光谱结果相反。 然而，速度场、$\sigma$和速度场残差在星系中心部分显示出显著偏离圆周运动的特征，这与沃尔夫-拉叶星和O型星数量较多的区域相匹配，该区域与星系的蓝色明亮组分重合。 我们在星系中心部分发现了电离气体的窄和宽速度成分。 宽成分是与正在进行的恒星形成爆发相关的中心外流的证据。 星系的形态-动力学分析表明，我们只看到了星系最明亮的部分，这些部分对应于核球、中央棒和盘的开始部分。 我们认为CIG 993是一个包含重要恒星形成过程的盘状星系，这很可能是由于相对较近的相互作用引起的。 这可能意味着小规模的相遇可以在不扰乱主要旋转盘运动或星系形态的情况下改变星系的整体特性。 显示英文摘要

摘要： We present scanning Fabry-Perot interferometric observations of CIG 993, an apparently isolated luminous infrared galaxy also exhibiting luminous blue compact and Wolf-Rayet galaxy features, as well as high star formation rate. Our high resolution observations of the H$\alpha$ emission line allowed us to derive the radial velocity field, as well as the velocity dispersion $\sigma$, and the residual velocity fields of the galaxy. This galaxy exhibits several kinematical components. On one hand, the velocity gradients detected on the velocity field can be associated with a rotating disk -contrary to previous results with less spectral resolution-. However, the velocity field, the $\sigma$ and residual velocity field show significant deviations from circular motions in the central part of the galaxy that matches a region with high number of Wolf-Rayet and O stars, coincident with the blue luminous component of the galaxy. We find narrow and broad velocity components for the ionized gas in the central part of the galaxy. The broad component is evidence of a central outflow related with the on-going burst of stellar formation. The morpho-kinematical analysis of the galaxy indicates we are only seeing the brightest parts of the galaxy which correspond to the bulge, a central bar and the beginning of the disk. We believe CIG 993 is a disk galaxy harboring important star-forming processes most likely caused by a relatively recent interaction. This could imply that small encounters could change the global characteristics of a galaxy without disturbing the main rotation disk motion, nor the morphology of the galaxy.