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Dwarf Galaxies in Clusters as Probes of Galaxy Formation and Dark Matter

Published online by Cambridge University Press:  11 July 2011

M. Koleva ,
Ph. Prugniel ,
I. Vauglin ,
S.J. Penny  and
C.J. Conselice
S.J. Penny
Affiliation:
School of Physics & Astronomy, University of Nottingham, Nottingham NG7 2RD, UK
C.J. Conselice
Affiliation:
School of Physics & Astronomy, University of Nottingham, Nottingham NG7 2RD, UK
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Abstract

We present the results of a Hubble Space Telescope (HST) study of dwarf galaxies in the nearby Perseus Cluster, down to MV = −12, spanning the core and outer regions of this cluster. We examine how the colour magnitude relation, structure and morphology are affected by environment for the lowest mass galaxies. On average, dwarfs in the outer regions of Perseus are more disturbed than those in the cluster core, with higher asymmetries and clumpier light distributions. We measure the (V − I)0 colours of the dEs, and find that dwarfs in the cluster core and outskirts lie on the same colour magnitude relation. We suggest that the disturbed dwarfs in the cluster outskirts are likely “transition dwarfs”, with their colours transforming before their structures. Finally, we infer from the smoothness of the cluster core population that these dwarfs must be highly dark matter dominated to prevent their disruption by the cluster potential.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 48: CRAL-2010 A Universe of Dwarf Galaxies , 2011 , pp. 197 - 202
Copyright
© EAS, EDP Sciences, 2011

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References

Conselice, C.J., 2003, ApJS, 147, 1CrossRef
De Rijcke, S., & Dejonghe, H., 2002, MNRAS, 329, 829CrossRef
De Rijcke, S., Penny, S.J., Conselice, C.J., Valcke, S., & Held, E.V., 2009, MNRAS, 393, 798CrossRef
Dressler, A., 1980, ApJ, 236, 351CrossRef
Gallagher, J.S. III, & Hunter, D.A., 1989, AJ, 98, 806CrossRef
Grebel, E.K., Gallagher, J.S. III, & Harbeck, D., 2003, AJ, 125, 1926CrossRef
Mathews, W.G., Faltenbacher, A., & Brighenti, F., 2005, ApJ, 638, 659CrossRef
Penny, S.J., & Conselice, C.J., 2008, MNRAS, 383, 247CrossRef
Penny, S.J., Conselice, C.J., De Rijcke, S., & Held, E.V., 2009, MNRAS, 393, 1054CrossRef
Smith, Castelli, A.V., Bassino, L.P., Richtler, T., et al., 2008, MNRAS, 386, 2311CrossRef
Strigari, L.E., Bullock, J.S., Kaplinghat, M., et alet al., 2007, ApJ, 669, 676CrossRef
Trentham, T., & Tully, R.B., 2009, MNRAS, 398, 722CrossRef