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The Dwarf Low Surface Brightness Population in Different Environments of the Local Universe

Published online by Cambridge University Press:  01 June 2007

S. Sabatini ,
J. I. Davies ,
S. Roberts  and
R. Scaramella
S. Sabatini
Affiliation:
INAF-Osservatorio Astronomico di Roma, via Frascati 33, 00040 Monte Porzio Catone, Roma,Italy email: sabatini@oa-roma.inaf.it; kosmobob@oa-roma.inaf.it Present address: INAF-OAR, via Frascati 33, Monte Porzio Catone, Roma, Italy
J. I. Davies
Affiliation:
Department of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff, CF24 3AA, UK email: Jonathan.Davies@astro.cf.ac.uk; Sarah.Roberts@faulkes-telescope.com
S. Roberts
Affiliation:
Department of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff, CF24 3AA, UK email: Jonathan.Davies@astro.cf.ac.uk; Sarah.Roberts@faulkes-telescope.com
R. Scaramella
Affiliation:
INAF-Osservatorio Astronomico di Roma, via Frascati 33, 00040 Monte Porzio Catone, Roma,Italy email: sabatini@oa-roma.inaf.it; kosmobob@oa-roma.inaf.it
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Abstract

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The nature of the dwarf galaxy population as a function of location in the cluster and within different environments is investigated. We have previously described the results of a search for low surface brightness objects in data drawn from an East-West strip of the Virgo cluster (Sabatini et al(2004)) and have compared this to a large area strip outside of the cluster (Roberts et al (2004)). In this talk I compare the East-West data (sampling sub-cluster A and outward) to new data along a North-South cluster strip that samples a different region (part of sub-cluster A, and the N, M clouds) and with data obtained for the Ursa Major cluster and fields around the spiral galaxy M101. The sample of dwarf galaxies in different environments is obtained from uniform datasets that reach central surface brightness values of 26 B mag/arcsec2 and an apparent B magnitude of 21 (MB =−10 for a Virgo Cluster distance of 16 Mpc). We discuss and interpret our results on the properties and distribution of dwarf low surface brightness galaxies in the context of variuos physical processes that are thought to act on galaxies as they form and evolve.

Keywords

dwarf galaxieslow suface brightness galaxiesclusters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S244: Dark Galaxies and Lost Baryons , June 2007 , pp. 311 - 320
Copyright
Copyright © International Astronomical Union 2008

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