6533b858fe1ef96bd12b5967
RESEARCH PRODUCT
The orientations of galaxy groups and formation of the Local Supercluster
Piotr FlinWlodzimierz Godlowskisubject
PhysicsCosmology and Nongalactic Astrophysics (astro-ph.CO)Group (mathematics)Semi-major axisFOS: Physical sciencesAstronomy and AstrophysicsAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsVirgo ClusterGalaxySpace and Planetary ScienceSuperclusterOrientation (geometry)Galaxy groupAstrophysics::Galaxy AstrophysicsAstrophysics - Cosmology and Nongalactic AstrophysicsLine (formation)description
We analysed the orientation of galaxy groups in the Local Supercluster (LSC). It is strongly correlated with the distribution of neighbouring groups in the scale till about 20 Mpc. The group major axis is in alignment with both the line joining the two brightest galaxies and the direction toward the centre of the LSC, i.e. Virgo cluster. These correlations suggest that two brightest galaxies were formed in filaments of matter directed towards the protosupercluster centre. Afterwards, 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-11-14 |