The Orientations of Galaxy Groups and Formation of the Local Supercluster

We analyzed the orientation of galaxy groups in the Local Supercluster (LSC). It is strongly correlated with the distribution of neighboring groups in the scale up to about 20 Mpc. The group major axis is in alignment with both the line joining the two brightest galaxies and the direction toward the...

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Published in:The Astrophysical journal 2010-01, Vol.708 (2), p.920-926
Main Authors: Godłowski, Włodzimierz, Flin, Piotr
Format: Article
Language:English
Subjects:
AGGLOMERATION
Astronomy
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COMPUTERIZED SIMULATION
Earth, ocean, space
Exact sciences and technology
FILAMENTS
GALAXIES
GALAXY CLUSTERS
MATTER
SIMULATION
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description We analyzed the orientation of galaxy groups in the Local Supercluster (LSC). It is strongly correlated with the distribution of neighboring groups in the scale up to about 20 Mpc. The group major axis is in alignment with both the line joining the two brightest galaxies and the direction toward the center of the LSC, i.e., Virgo cluster. These correlations suggest that two brightest galaxies were formed in filaments of matter directed toward the protosupercluster center. Afterward, the hierarchical clustering leads to aggregation of galaxies around these two galaxies. The groups are formed on the same or similarly oriented filaments. This picture is in agreement with the predictions of numerical simulations.
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subjects AGGLOMERATION
Astronomy
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COMPUTERIZED SIMULATION
Earth, ocean, space
Exact sciences and technology
FILAMENTS
GALAXIES
GALAXY CLUSTERS
MATTER
SIMULATION
title The Orientations of Galaxy Groups and Formation of the Local Supercluster
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