标题： 基于 SAURON 和 OASIS积分场光谱仪的早期星系的恒星运动学和恒星群特性 显示英文标题

标题： Stellar Kinematics and Populations of Early-Type Galaxies with the SAURON and OASIS Integral-Field Spectrographs

摘要： 我们总结了早期星系的积分场光谱观测结果与成就，这些观测是作为一项使用SAURON和OASIS光谱仪的调查的一部分进行的。 从积分场光谱学的角度来看，这些原本光滑且无特征的星系显示出丰富的结构，无论是恒星动力学还是恒星群体方面。 我们重点关注恒星成分，并使用SAURON在千秒差距尺度上以及使用OASIS在数百秒差距尺度上研究其性质。 这些互补的研究揭示了两种主要在固有大小上不同的运动学上独立的组件（KDCs）。 在之前的研究中，KDCs及其宿主星系在其他方面通常被认为是平凡的。 我们表明，典型的大型KDCs确实与其宿主星系几乎没有年龄差异。 通过OASIS更高的空间分辨率检测到的KDCs本质上更小，并且包括显著比例的年轻恒星。 我们推测了KDCs与其宿主星系之间的关系，以及这对早期星系中的年轻恒星群体的意义。 显示英文摘要

摘要： We summarise the results and achievements of integral-field spectroscopy of early-type galaxies, observed as part of a survey using both the SAURON and OASIS spectrographs. From the perspective of integral-field spectroscopy, these otherwise smooth and featureless objects show a wealth of structure, both in their stellar kinematics and populations. We focus on the stellar content, and examine properties on both kiloparsec scales with SAURON, and scales of 100's of parsecs with OASIS. These complementary studies reveal two types of kinematically distinct components (KDCs), differing primarily in their intrinsic sizes. In previous studies, KDCs and their host galaxies have generally been found to be unremarkable in other aspects. We show that large KDCs, typical of the well-studied cases, indeed show little or no age differences with their host galaxy. The KDCs detected with the higher spatial-resolution of OASIS are intrinsically smaller and include, in contrast, a significant fraction of young stars. We speculate on the relationship between KDCs and their host galaxies, and the implications for young populations in early-type galaxies.