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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of The Korean Astronomical Society
Journal Basic Information
Journal DOI :
The Korean Astronomical Society
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Volume & Issues
Volume 9, Issue 1 - Dec 1976
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Effect of a Magnetic Field on Thermal Conductivity of Partially Ionized Gases
Yun, Hong-Sik ;
Journal of The Korean Astronomical Society, volume 9, issue 1, 1976, Pages 1~6
The translational and reactive parts of thermal conductivity of a partially ionized solar magneto-plasma gas have been calculated based on Yun and Wyller's formulation (1972) along with Devoto's theory(1968). The computed results are presented as functions of temperature and pressure for given magnetic field strengths. The results of the calculations show that for most photospheric conditions the magnetic field does not play any important role in characterizing thermal properties of the ionized gas. However, when the gas pressure is low(e.g., P<10 dynes/
) the field becomes extremely effective even if its strength is quite small (e.g., B<0.1 gauss). The reactive part of the thermal transport is found to be very important when the gas is undertaking active ionization.
Photoelectric Observations of Selected Visual Binaries
Nha, Il-Seong ;
Journal of The Korean Astronomical Society, volume 9, issue 1, 1976, Pages 7~8
Standardized photoelectric magnitudes and color indices of 23 components of 17 visual binaries are presented.
Global Theory of Einstein-Cartan Equations - Godel Universe with Torsion -
Minn, Ho-Kee ;
Journal of The Korean Astronomical Society, volume 9, issue 1, 1976, Pages 9~14
Godel models of the universe filled with fluid are studied in the framework of the Einstein-Cartan theory of gravitation. It is assumed that the models admit a group of motions simply transitive on space-time. The combined effects of spin and rotation(vorticity) are studied with a particular attention to whether the held equations impose any restriction on alignement of spin direction (a polarized spin distribution). The solutions are found explicitly in a closed form, which show that spin components are vanishingly small except in the direction of z-axis (the compass of inertia) in which they can assume an arbitrary distribution.
A Study on the Luminosity Function of the Galactic Clusters-I
Yun, Kyung-Loh ;
Journal of The Korean Astronomical Society, volume 9, issue 1, 1976, Pages 15~39
188 galactic clusters have been investigated to obtain their luminosity functions. It is attempted to interpret the resulting luminosity functions in regard to cluster formation.