The Properties of Isolated Main Galaxies in Sloan Digital Sky Survey Data Release 3 (SDSS DR3)

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Contents Vol 23(2)

doi:10.1071/AS05019

The Properties of Isolated Main Galaxies in Sloan Digital Sky Survey Data Release 3 (SDSS DR3)

Xinfa Deng ^A ^B, Xinsheng Ma ^A, Chenghong Luo ^A, Qun Zhang ^A, Qing-Hua Liao ^A, Ji-zhou He ^A

^A Mathematics and Physics College, Nanchang University, Jiangxi 330047, China
^B Corresponding author. E-mail: xinfadeng@163.com





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Publications of the Astronomical Society of Australia 23(2) 76–81 http://dx.doi.org/10.1071/AS05019
Submitted: 22 June 2005 Accepted: 7 October 2005 Published online: 25 July 2006

Abstract

We have constructed a Main galaxy subsample of 67777 galaxies with redshifts in the range 0.08 ≤ z ≤ 0.12 from the Sloan Digital Sky Survey Data Release 3. Using cluster analysis, two isolated Main galaxy samples were extracted from this subsample. The two isolated Main galaxy samples identified at different radii have the same properties. Additionally, we find fewer early-type galaxies in isolated Main galaxy samples than in a close double galaxy sample.

Keywords: cosmology, galaxy, cluster analysis