A Complex Stellar Line-of-Sight Velocity Distribution in the Lenticular Galaxy NGC 524
A Complex Stellar Line-of-Sight Velocity Distribution in the Lenticular Galaxy NGC 524
复制标题
透镜状星系 NGC 524 中复杂的恒星视线速度分布
DOI：
10.1515/astro-2017-0318
复制
发表时间：
2011
期刊：
影响因子：
0.7
通讯作者：
V. Afanasiev
中科院分区：
文献类型：
--
作者：
I. Katkov;I. Chilingarian;O. Sil’chenko;A. Zasov;V. Afanasiev
摘要利用俄罗斯6米望远镜获得的长缝光谱观测数据和SAURON巡天的IFU数据，对明亮的早期星系NGC 524的恒星和气体运动学进行了详细的研究。NGC 524的恒星视距速度分布（LOSVD）表现出强烈的不对称性。我们使用nburst全光谱拟合技术的两种互补方法对LOSVD进行了全面分析：(a)非参数LOSVD恢复和(b)具有不同恒星群的两个高斯运动分量的参数恢复。我们讨论了ngc524复杂的恒星LOSVD的起源。
Abstract We present a detailed study of the stellar and gaseous kinematics in the luminous early-type galaxy NGC 524, derived from the long-slit spectroscopic observations obtained with the Russian 6 m telescope and the IFU data from the SAURON survey. The stellar line-of-sight velocity distribution (LOSVD) of NGC 524 exhibits strong asymmetry. We performed a comprehensive analysis of the LOSVD using two complementary approaches by the nbursts full spectral fitting technique: (a) a non-parametric LOSVD recovery and (b) a parametric recovery of two Gaussian kinematical components having different stellar populations. We discuss the origin of the complex stellar LOSVD of NGC 524.