标题： 合并残余物的调查 II：正在出现的动力学和 photometric 相关性 显示英文标题

标题： A Survey of Merger Remnants II: The Emerging Kinematic and Photometric Correlations

摘要： This paper is the second in a series exploring the properties of 51 {\it 光学地} selected, single-nuclei merger remnants. Spectroscopic data have been obtained for a sub-sample of 38 mergers and combined with previously obtained infrared photometry to test whether mergers exhibit the same correlations as elliptical galaxies among parameters such as stellar luminosity and distribution, central stellar velocity dispersion ($\sigma$$_{\circ}$ ), and metallicity. Paramount to the study is to test whether mergers lie on the Fundamental Plane. Measurements of $\sigma$$_{\circ}$ have been made using the Ca triplet absorption line at 8500 {\AA } for all 38 mergers in the sub-sample. 对于子样本中的两个合并事件，使用 2.29 $\micron$处的 CO 吸收线进行了 $\sigma$$_{\circ}$ 的额外测量。 结果表明，合并事件在 Fundamental Plane 参数之间显示出强烈的关联性，但未能在 $\sigma$$_{\circ}$ 和金属丰度（Mg$_{2}$）之间显示出强烈的关联性。 与早期的研究相反，这些合并事件的$\sigma$$_{\circ}$ 与位于中间质量到明亮巨椭圆星系之间的天体一致。然而，与早期研究的差异似乎与是使用CaⅡ三重线还是CO吸收线来推导$\sigma$$_{\circ}$ 有关，后者几乎总是产生较小的值。最后，利用测光和动力学数据首次证明了合并星系的中心相空间密度与椭圆星系相当。这解决了长期以来对合并假说的批评。 显示英文摘要

摘要： This paper is the second in a series exploring the properties of 51 {\it optically} selected, single-nuclei merger remnants. Spectroscopic data have been obtained for a sub-sample of 38 mergers and combined with previously obtained infrared photometry to test whether mergers exhibit the same correlations as elliptical galaxies among parameters such as stellar luminosity and distribution, central stellar velocity dispersion ($\sigma$$_{\circ}$), and metallicity. Paramount to the study is to test whether mergers lie on the Fundamental Plane. Measurements of $\sigma$$_{\circ}$ have been made using the Ca triplet absorption line at 8500 {\AA} for all 38 mergers in the sub-sample. Additional measurements of $\sigma$$_{\circ}$ were made for two of the mergers in the sub-sample using the CO absorption line at 2.29 $\micron$. The results indicate that mergers show a strong correlation among the parameters of the Fundamental Plane but fail to show a strong correlation between $\sigma$$_{\circ}$ and metallicity (Mg$_{2}$). In contrast to earlier studies, the $\sigma$$_{\circ}$ of the mergers are consistent with objects which lie somewhere between intermediate-mass and luminous giant elliptical galaxies. However, the discrepancies with earlier studies appears to correlate with whether the Ca triplet or CO absorption lines are used to derive $\sigma$$_{\circ}$, with the latter almost always producing smaller values. Finally, the photometric and kinematic data are used to demonstrate for the first time that the central phase-space density of mergers are equivalent to elliptical galaxies. This resolves a long-standing criticism of the merger hypothesis.