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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Publications of The Korean Astronomical Society
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Journal DOI :
The Korean Astronomical Society
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Volume & Issues
Volume 2, Issue 1 - Dec 1985
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On the SNU uvby,
Kim, Hee-Soo ; Lee, See-Woo ;
Publications of The Korean Astronomical Society, volume 2, issue 1, 1985, Pages 1~12
We examined the characteristics of the SNU uvby,
filter system through the computation of theoretical photometric indices and the transformation of the observed instrumental system to the natural and standard systems.
Magnetic Reconnection and the Substorm
Min, Kyoung-Wook ;
Publications of The Korean Astronomical Society, volume 2, issue 1, 1985, Pages 13~20
Magnetic reconnect ion is studied numerically by means of a two dimensional MHD code. The initial magnetic field configuration is the two-dimensional dipole field, and the simulation model involves magnetic reconnect ion driven by the magnetized plasma flow. Strong plasma jetting, plasmoid formation and its fast ejection are observed in the downstream region. The dependence of reconnection rate on the incoming energy flux is found to be very sensitive, while the magnitude of the resistivity does not influence much on the reconnection rate. The simulation results are discussed in the context of the geomagnetic substorm.
On the Galaxy Formation: Two Theories of Galaxy Formation
Hyun, Jong-June ;
Publications of The Korean Astronomical Society, volume 2, issue 1, 1985, Pages 21~29
Two theories, the adiabatic and the isothermal, of galaxy formation are surveyed with regard to the current observational constraints, Some advantage of non-baryonic theory compared with the usual baryonic theory is discussed.
Initial Mass Functions of Massive Stars in OB Associations
Kang, Yong-Hee ;
Publications of The Korean Astronomical Society, volume 2, issue 1, 1985, Pages 30~38
We derived initial mass functions (IMF) of massive stars in three different regions of spiral arms within 2.5kpc from the sun. The derived IMF slope
of Local arm stars is found to be
, very close to that of Bisiacchi et al. (1983). For Sagittarius-Carina arm stars
ranges from -1.77 to - 1.72 which is close to that of overall stars given by Germany et al. (1982). Possible causes inducing the regional difference in IMFs are discussed.
The Reddening of the Bright G and K Stars
Ann, Hong-Bae ;
Publications of The Korean Astronomical Society, volume 2, issue 1, 1985, Pages 39~46
We analyzed the reddening of 873 bright G and K stars from the DDO photometry in combination with MK spectral classes and (B-V) colors. About a quarter of the sample stars have DDO indices beyond the limits of DDO calibrations. To extend the reddening determination to all stars, we applied a scheme for reddening determination of field G and K stars by using the DDO calibrations (Janes 1977, 1979b) and MK-(B-V) relation of FitzGerald (1970).
A Method of Utilizing Small Astronomical Telescopes in Earth Science Instruction
Kim, Kyong-Im ; Lee, Young-Bom ;
Publications of The Korean Astronomical Society, volume 2, issue 1, 1985, Pages 47~60
Four observational astronomical item, have been pilottested with a 150mm refracting telescope in order to layout the detailed procedures for the suggested (inquiry) activities listed in the high school earth science curriculum and to contrive some adequate instructions for students stressed on how to make proper treatments with the collected materials. The tested items were of sunspots' motion, the size of lunar craters, the Galilian satellites' revolution, and the galactic distribution of stars. Following series of activities are suggested with respect to the way of collecting observational data and of giving proper instruction to students in class: 1) Photography and other material, he made by teacher and/or extracurricular group of students; 2) Replicas (xeroxed, photographs, Or slides) he made from the collected materials, '0 that they are available to all the students in class; 3) Quantative analyses, be taken as student' activity.