FUNDAMENTAL PLANE OF GROUPS AND CLUSTERS OF GALAXIES: DISTANCES AND PECULIAR VELOCITIES OF SUPERCLUSTERS OF GALAXIES ON SMALL SCALES
Section: PHYSICS OF GALAXIES AND COSMOLOGY
Authors:
1.
Special Astrophysical Observatory of the Russian Academy of Sciences
2.
Special Astrophysical Observatory of the Russian Academy of Sciences
Type:
Сonference article
Published:
27.12.2024
Subject area:
52
53
520
521
523
524
52-1
52-6
41.00
29.35
29.31
29.33
29.27
29.05
03.06.01
03.05.01
03.04.03
2
223
614
6135
SCI004000
SCI005000
53
520
521
523
524
52-1
52-6
41.00
29.35
29.31
29.33
29.27
29.05
03.06.01
03.05.01
03.04.03
2
223
614
6135
SCI004000
SCI005000
Language:
English
Keywords:
galaxies: groups and clusters: distances and redshifts; cosmology: large-scale structure of universe
Abstract (English):
We have studied the relationships between the basic properties of 172 groups and clusters of galaxies based on archival data from the SDSS, 2MASX, and NED catalogs. The measured parameters ($\log R_e$, $\langle \log I_e \rangle $ and $\log \sigma$ of the clusters of galaxies determine the fundamental plane (FP) in the near infrared: $\log R_e=0.98(\pm0.06)\,\log \sigma-0.56(\pm0.04)\langle \log \langle I_e \rangle \rangle+3.57(\pm0.07)$, which can be used to determine the distances of the galaxy systems. The root-mean-square deviation of the FP zero-point is 0.07, which corresponds to an error of 16% in determining the distance of the group or cluster of galaxies. For the first time we have measured the peculiar velocities of the superclusters of galaxies. The mean peculiar velocity of the 5 superclusters of galaxies relative to the CMB is $+75\pm360$ km/s.
We have studied the relationships between the basic properties of 172 groups and clusters of galaxies based on archival data from the SDSS, 2MASX, and NED catalogs. The measured parameters ($\log R_e$, $\langle \log I_e \rangle $ and $\log \sigma$ of the clusters of galaxies determine the fundamental plane (FP) in the near infrared: $\log R_e=0.98(\pm0.06)\,\log \sigma-0.56(\pm0.04)\langle \log \langle I_e \rangle \rangle+3.57(\pm0.07)$, which can be used to determine the distances of the galaxy systems. The root-mean-square deviation of the FP zero-point is 0.07, which corresponds to an error of 16% in determining the distance of the group or cluster of galaxies. For the first time we have measured the peculiar velocities of the superclusters of galaxies. The mean peculiar velocity of the 5 superclusters of galaxies relative to the CMB is $+75\pm360$ km/s.
Keywords:
galaxies: groups and clusters: distances and redshifts; cosmology: large-scale structure of universe
galaxies: groups and clusters: distances and redshifts; cosmology: large-scale structure of universe
1. Kopylova F.G. and Kopylov A.I., 2016, Astrophysical Bulletin, 71, 3, p. 257
2. Kopylova F.G. and Kopylov A.I., 2024, Astrophysical Bulletin, 79, 1, p. 1
3. Schaeffer R., Maurogordato S., Cappi A., et al., 1993, Monthly Notices of the Royal Astronomical Society, 263, p. L21
