A Survey of the Interstellar Medium in Early-Type Galaxies. III. Stellar and Gas Kinematics
A Survey of the Interstellar Medium in Early-Type Galaxies. III. Stellar and Gas Kinematics
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早期星系中星际介质的调查。
DOI：
10.1086/313315
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
M. Pastoriza
中科院分区：
文献类型：
--
作者：
N. Caon;D. Macchetto;M. Pastoriza
我们提出了气体和恒星运动学的14个富含气体的早型星系。一半的样品表现出不规则的气体速度分布，气体/星星反向旋转是可见的五个星系。我们还发现了五个反向旋转的恒星核心，而五个星系显示内部组件运动学解耦的主要恒星体。我们解释我们的结果表明，电离气体是外部来源，一般不平衡，可能是最近收购。将气体带入星系的合并或吸积事件也影响了恒星的运动学。
We present gaseous and stellar kinematics for 14 gas-rich early-type galaxies. Half of the sample exhibit irregular gaseous velocity profiles; gas/star counter-rotation is visible in five galaxies. We also find five counter-rotating stellar cores, while five more galaxies display inner components kinematically decoupled from the main stellar body. We interpret our results as an indication that the ionized gas is of external origin, is generally not in equilibrium, and may have been acquired recently. The merging or accretion events that brought the gas into the galaxy have also affected the stellar kinematics.