Journal of The Korean Astronomical Society (천문학회지)
- Volume 29 Issue 1
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- Pages.63-73
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- 1996
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- 1225-4614(pISSN)
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- 2288-890X(eISSN)
CHEMICAL EVOLUTION OF THE GALAXY: RADIAL PROPERTIES
- PARK BYEONG-GON (Bohyunsan Optical Astronomy Observatory, Korea Astronomy Observatory, Department of Astronomy and Atmospheric Sciences, Kyungpook National University) ;
- KANG YONG HEE (Department of Earth Science Education, Kyungpook National University) ;
- LEE SEE-WOO (Department of Astronomy, Seoul National University)
- Published : 1996.04.01
Abstract
The previous study of chemical evolution of the Galaxy is extended to the radial properties of the Galactic disk. The present model includes radial dependency of the time-dependent bimodal IMF, radial flow of material in the disk, and the change of type I supernova explosion rate with radial distance from the disk center as model parameters and observed gas and stellar density distributions and metallicity abundance gradient as observational constraints. The results of two models in this study explain the observed gas and stellar density distributions well, with the slope of the gas density gradient in the region of 4.5 kpc