• The Bulletin of The Korean Astronomical Society
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• v.21
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• pp.7-7
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• 1996

• The Bulletin of The Korean Astronomical Society
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• v.28 no.2
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• pp.77-77
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• 2003

• The Bulletin of The Korean Astronomical Society
• /
• v.24 no.1
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• pp.29-29
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• 1999

• The Bulletin of The Korean Astronomical Society
• /
• v.30 no.1
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• pp.26.1-26.1
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• 2005

• The Bulletin of The Korean Astronomical Society
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• v.27 no.1
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• pp.21-21
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• 2002

• The Bulletin of The Korean Astronomical Society
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• v.19
• /
• pp.21.2-22
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• 1994

• The Bulletin of The Korean Astronomical Society
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• v.34 no.1
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• pp.121-121
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• 2009

• Journal of The Korean Astronomical Society
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• v.29 no.spc1
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• pp.223-225
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• 1996

We review current theoretical understanding of the spectral properties (low and high states, transition of states, quasi-periodic oscillations etc.) of the low mass as well as supermassive black hole candidates.

• Journal of Astronomy and Space Sciences
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• v.39 no.4
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• pp.169-180
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• 2022

We investigated the chemical composition of the planetary host halo star HD47536 via high-resolution spectral observations recorded using a 1.5 meter Cerro Tololo Inter-American Observatory (CTIO) telescope (Chile). Furthermore, we determined the abundances of 38 chemical elements. Both light and heavy elements were overabundant compared to the iron group elements. The abundance pattern of HD47536 was similar to that of halo-type stars, with an enrichment of heavy elements. We analyzed the relationships between the relative abundances of chemical elements and their second ionization potentials and condensation temperatures. We demonstrated that the interplay of charge-exchange reactions owing to the accretion of interstellar matter and the gas-dust separation mechanism can influence the initial abundances and can be used to qualitatively explain the abundance patterns in the atmosphere of HD47536.

• The Bulletin of The Korean Astronomical Society
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• v.39 no.2
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• pp.104.2-104.2
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• 2014

The RGB Bayer filter system consists of mosaic R, G, and B filters on the grid of photo sensors with which typical commercial DSLR (Digital Single Lens Reflex) cameras and CCD/CMOS cameras are taken. Many unique astronomical data taken with RGB Bayer filter systems are available, including transient objects, e.g., supernovae, variable stars, and solar system bodies. The utilization of such data in scientific research strongly requires reliable photometry transformation methods. In this work, we develop a series of formulae to derive magnitudes in the Johnson-Cousins BVR filter system from those in the RGB Bayer filter system.