We construct a simple photometric evolution model of galaxies based on the evolutionary population synthesis. In our models an exponentially decreasing SFR with a power law IMF is used to compute the UBV colors of galaxies from ellipticals to late type spirals. It is shown that the integrated colors of galaxies with different Hubble type can be explained by one parameter, SFR.

ABSTRACT
Ⅰ. INTRODUCTION
Ⅱ. FUNDAMENTAL DATA OF STARS
Ⅲ. PHOTOMETRIC MODELS
Ⅳ. RESULTS AND DISCUSSIONS
Ⅴ. CONCLUDING REMARKS
REFERENCES

• ANN HONG BAE(Department of Earth Science, Pusan National University)
• LEE CHANG WON(Department of Earth Science, Pusan National University)
• LEE SEE-WOO(Department of Astronomy, Seoul National University)