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The radial extent of the Fornax cluster Low Surface Brightness galaxy population

Published online by Cambridge University Press:  12 April 2016

J.I. Davies ,
A. Kambas ,
Z. Morshidi-Esslinger  and
R. Smith
J.I. Davies
Affiliation:
Department of Physics and Astronomy, University of Cardiff, Cardiff, UK
A. Kambas
Affiliation:
Department of Physics and Astronomy, University of Cardiff, Cardiff, UK
Z. Morshidi-Esslinger
Affiliation:
Department of Physics and Astronomy, University of Cardiff, Cardiff, UK
R. Smith
Affiliation:
Department of Physics and Astronomy, University of Cardiff, Cardiff, UK

Abstract

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In this paper we compare the radial distribution of Fornax cluster galaxies selected at different surface brightness values. The bright galaxy (RC3) sample surface brightness distribution peaks at a μBx = 21.5, the Low Surface Brightness (LSB) sample at μBx = 23.7 and the very Low Surface Brigthness (VLSB) sample at μBx = 25.7. The bright galaxy surface density decreases with an exponential scale length of α = 0.5°, the LSB galaxies with α = 1.3° and the VLSB galaxies with α = 2.0°. Thus the LSB and VLSB populations define a mass scale size some 2.5 and 4 times larger than the bright galaxies respectively. The contribution of the VLSB population to the total cluster luminosity is comparible to that of the brighter galaxies. If their mass to light ratios are significantly larger than than that of the bright galaxies they will dominate the mass and possibly account for the missing mass in clusters.

Type
Low Surface Brightness galaxy surveys
Information
International Astronomical Union Colloquium , Volume 171: The Low Surface Brightness Universe , 1999 , pp. 138 - 144
Copyright
Copyright © Astronomical Society of the Pacific 1999

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