Applying five morphological parameters defined along the main sequence (MS), red giant branch (RGB) and horizontal branch (HB) in the C-M diagram (CMD), and the transition period-luminosity relation for RR Lyrae variables, some basic physical quantities such as helium abundance, age, mass and luminosity are determined for 21 well observed globular clusters with combination of evolutionary models and atmospheric models properly chosen by the numerical test. The dependences of these quantities on the age and chemical abundance are investigated.

ABSTRACT
Ⅰ. INTRODUCTION
Ⅱ. MORPHOLOGICAL PARAMETERS
Ⅲ. DETERMINATION OF SOME PHYSICAL QUANTITIES
Ⅳ. CORRELATIONS BETWEEN PHYSICAL PARAMETERS
Ⅴ. SUMMARY AND DISCUSSION
REFERENCES

• KIM KANG MIN(Institute of Space Science and Astronomy)
• LEE SEE-WOO(Department of Astronomy, Seoul National University)