Environmental enhancement of loose groups around rich clusters of galaxies - INSPIRE

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Environmental enhancement of loose groups around rich clusters of galaxies

Maret Einasto
(
- Tartu Observ.
)
,
J. Einasto
(
- Tartu Observ.
)
,
V. Mller
(
- Potsdam, Astrophys. Inst.
)
,
P. Heinamaki
(
- Tartu Observ. and
- Tuorla Observ.
)
,
D.L. Tucker
(
- Fermilab
)

Nov, 2002

13 pages

Published in:

Astron.Astrophys. 401 (2003) 851-862

e-Print:

astro-ph/0211590 [astro-ph]

DOI:

10.1051/0004-6361:20021727

Report number:

FERMILAB-PUB-02-447-A

View in:

ADS Abstract Service

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Abstract: (arXiv)

We have studied the properties of Las Campanas Loose Groups in the neighbourhood of rich (Abell, APM and X-ray) clusters of galaxies. These loose groups show strong evidence of segregation measured in terms of the group richness and the group velocity dispersion: loose groups in the neighbourhood of a rich cluster are typically 2.5 times more massive and 1.6 times more luminous than groups on average, and these loose groups havevelocity dispersions 1.3 times larger than groups on average. This is evidence that the large-scale gravitational field causing the formation of rich clusters enhances the evolution of neighbouring poor systems, a phenomenon recently established in numerical simulations of group and cluster formation.

COSMOLOGY OBSERVATIONS
LSS

References(42)

Figures(0)

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