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Velocity field in cluster outskirts in $Lambda$CDM models

Published online by Cambridge University Press:  06 October 2004

Maximiliano C. Pivato ,
N. D. Padilla  and
D. G. Lambas
Maximiliano C. Pivato
Affiliation:
Grupo IATE, Observatorio Astronómico de Córdoba, UNC, Argentina email: maxip@oac.uncor.edu; dgl@oac.uncor.edu
N. D. Padilla
Affiliation:
Dept. Physics, University of Durham, South Road, Durham, DH1 3LE, UK email: n.d.padilla@durham.ac.uk
D. G. Lambas
Affiliation:
Grupo IATE, Observatorio Astronómico de Córdoba, UNC, Argentina email: maxip@oac.uncor.edu; dgl@oac.uncor.edu
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Abstract

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We analyse statistically the infall of mass onto clusters in $\Lambda$-CDM numerical simulations. Also, we consider numerical simulations which include galaxy formation through semi-analytical models to compare the expected infall of mass and galaxies. We find the most probable values at $V \sim 300-400$ km/s and a significant tail of large infall velocities ($V > 1000$ km/s). The flow onto cluster is more pronounced for high local density regions. Mass and galaxies behave similarly although with a slightly lower amplitude.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUC195 , March 2004 , pp. 316 - 318
Copyright
© 2004 International Astronomical Union