Using the volume-limited Main galaxy sample constructed from the Sloan Digital Sky Survey Data Release 7 (SDSS DR7), we explore the environmental dependence of the fraction of ‘unconventional’ galaxies: luminous blue and faint red. It is found that the fraction of faint red increases apparently with increasing local density, and the fraction of luminous blue declines substantially with increasing local density, which shows that there is an environmental dependence for color beyond that for luminosity.

ABSTRACT
1. INTRODUCTION
2. DATA AND SAMPLE
3. ENVIRONMENTAL DEPENDENCE OF THE FRACTION OF ‘UNCONVENTION-AL’ GALAXIES
4. SUMMARY
REFERENCES

• XIN-FA DENG(School of Science, Nanchang University) Corresponding Author
• FUYANG ZHANG(School of Information Engineering, Nanchang University)
• JUN SONG(School of Science, Nanchang University)
• YI-QING CHEN(School of Science, Nanchang University)
• PENG JIANG(School of Science, Nanchang University)