Fundamental Plane of Groups and Clusters of Galaxies: Distances and Pecular Velocities of Superclusters of Galaxies on Small Scales

IF 1.3 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Astrophysical Bulletin Pub Date : 2024-05-08 DOI:10.1134/s1990341324600054

F. G. Kopylova, A. I. Kopylov

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Abstract

This work is a continuation of the work of Kopylova and Kopylov published in 2016 on constructing the fundamental plane (FP) of groups and clusters of galaxies. In this article, the sample of galaxy systems has been increased from 94 to 172 objects. We have studied the relationships between the main characteristics of groups and clusters of galaxies using archival data from the SDSS, 2MASX, and NED catalogs. The measured parameters (\(\log L_{K}\), \(\log R_{e}\) and \(\log\sigma\)) of galaxy clusters define the fundamental plane in the near-infrared region: \(L_{K}\propto R_{e}^{0.77\pm 0.09}\sigma^{1.44\pm 0.12}\). The shape of the FP of groups and clusters is consistent with the FP of early-type galaxies (SDSS, \(r\)-filter), determined in the same way. Regression against \(\log R_{e}\) in kpc gives the projection of the FP: \(\log R_{e}=0.98(\pm 0.06)\,\log\sigma-0.56(\pm 0.04)\langle\log I_{e}\rangle+3.57(\pm 0.07)\), which can be used to determine the distances of galaxy systems. The \(rms\) scatter of the zero point is 0.07, which is equivalent to a 16\(\%\) error in determining the distance to a group or cluster of galaxies. For the first time, we have determined the average relative FP distances and peculiar velocities of five large superclusters of galaxies. According to our estimates, the average peculiar velocity of these superclusters relative to the CMB is \(+75\pm 360\) km s\({}^{-1}\).

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星系群和星系团的基本平面：小尺度超星系团的距离和奇点速度

摘要这项工作是Kopylova和Kopylov于2016年发表的关于构建星系群和星系团基本面（FP）的工作的延续。在这篇文章中，星系系统的样本从94个增加到了172个。我们利用来自SDSS、2MASX和NED星表的档案数据，研究了星系群和星系团主要特征之间的关系。星系团的测量参数（\(\log L_{K}\)，\(\log R_{e}\)和\(\log\sigma\)）定义了近红外区域的基本面：\L_{K}\propto R_{e}^{0.77\pm 0.09}\sigma^{1.44\pm 0.12}\).星系团和星团的FP形状与早期型星系的FP（SDSS，\(r\)-filter）是一致的，是用同样的方法确定的。以kpc为单位对\(\log R_{e}\)进行回归，就得到了FP的投影：\(\log R_{e}=0.98(\pm 0.06)\,\log\sigma-0.56(\pm 0.04)\langle\log I_{e}\rangle+3.57(\pm 0.07)\)，它可以用来确定星系系统的距离。零点的（rms）散度是0.07，这相当于在确定一个星系群或星系团的距离时有16（\%）的误差。我们首次测定了五个大型超星系团的平均相对FP距离和奇特速度。根据我们的估计，这些超星系团相对于CMB的平均奇特速度是\(+75\pm 360\) km s\({}^{-1}\).

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来源期刊

Astrophysical Bulletin 地学天文-天文与天体物理

CiteScore

2.00

自引率

33.30%

发文量

审稿时长

>12 weeks

期刊介绍： Astrophysical Bulletin is an international peer reviewed journal that publishes the results of original research in various areas of modern astronomy and astrophysics, including observational and theoretical astrophysics, physics of the Sun, radio astronomy, stellar astronomy, extragalactic astronomy, cosmology, and astronomy methods and instrumentation.