星系团宽场巡天中的WINGS-SPE光谱
WINGS-SPE Spectroscopy in the WIde-field Nearby Galaxy-cluster Survey
摘要：
目标。我们提出的结果，从一个全面的光谱调查的WINGS（宽场附近的星系团调查）集群，一个程序称为WINGS-SPE。WINGS-SPE样本由48个星团组成，其中22个在南部天空，26个在北部天空。这次光谱巡天的主要目的是：（1）研究WINGS星系团及其组成星系的动力学和运动学，（2）探索在不同密度环境下，以及在广泛的星系团X射线光度和光学性质之间的光谱性质和形态演化之间的联系。方法.我们用多目标光纤光谱仪对WINGS星系团样品进行了中分辨率的观测，用互相关技术测量了红移，平均精度约为45 km/s。结果本文介绍了6137个星系的红移测量结果及其初步分析。详细的光谱观测报告。WINGS-SPE与以前发表的数据集有大约30%的重叠，使我们能够与文献进行完整的比较，并扩展目录。结论.使用我们的红移，我们计算的速度色散的所有集团在WINGS-SPE样品。我们几乎trip- licate已知的成员星系在每个星系团的数量与以前的工作。我们还研究了WINGS-SPE星系团的X射线光度与速度色散的关系，发现它与Lx与σ成正比的形式^[4]是一致的。
英文摘要：
Aims. We present the results from a comprehensive spectroscopic survey of the WINGS (WIde-field Nearby Galaxy-cluster Survey) clusters, a program called WINGS-SPE. The WINGS-SPE sample consists of 48 clusters, 22 of which are in the southern sky and 26 in the north. The main goals of this spectroscopic survey are: (1) to study the dynamics and kinematics of the WINGS clusters and their constituent galaxies, (2) to explore the link between the spectral properties and the morphological evolution in different density environments and across a wide range in cluster X-ray luminosities and optical properties. Methods. Using multi object fiber fed spectrographs, we observed our sample of WINGS cluster galaxies at an intermediate resolu- tion of 6-9 A and, using a cross-correlation technique, we measured redshifts with a mean accuracy of about 45 km/s. Results. We present redshift measurements for 6137 galaxies and their first analyses. Details of the spectroscopic observations are reported. The WINGS-SPE has about 30% overlap with previously published data sets, allowing us to do both a complete comparison with the literature and to extend the catalogs. Conclusions. Using our redshifts, we calculate the velocity dispersion for all the clusters in the WINGS-SPE sample. We almost trip- licate the number of member galaxies known in each cluster with respect to previous works. We also investigate the X-ray luminosity vs. velocity dispersion relation for our WINGS-SPE clusters, and find it to be consistent with the form Lx proportional to sigma^4.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
