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Tidal Dwarf Galaxies around a Post-Merger Galaxy, NGC 4922
Sheen, Yun-Kyeong,Jeong, Hyun-Jin,Yi, Suk-Young K,Ferreras, Ignacio,Lotz, Jennifer M.,Olsen, Knut A.G.,Dickinson, Mark,Barnes, Sydney,Lee, Young-Wook,Park, Jang-Hyun,Ree, Chang-H. 한국우주과학회 2009 한국우주과학회보 Vol.18 No.2
One possible channel for the formation of dwarf galaxies involves birth in the tidal tails of interacting galaxies. We report the detection of a bright UV tidal tail and several young tidal dwarf galaxy candidates in the post-merger galaxy NGC 4922 in the
THE NIGHT SKY SPECTRUM OF MOUNT BOHYUN
SHEEN YUN-KYEONG,BYUN YONG-IK The Korean Astronomical Society 2004 Journal of The Korean Astronomical Society Vol.37 No.2
Spectrophotometry of the night sky over Mount Bohyun is presented for the nearly entire visible wavelengths of $3600{\~}$8600{\AA}$. The data was obtained under moonless clear sky in February 2004 with the 1.8-m telescope and the long slit spectrograph. The sky spectrum shows a number of strong emission lines originated from light pollution, especially due to high pressure sodium lamps. When compared to the night sky of Kitt Peak, our sky continuum is 1 to 2 magnitude brighter at all wavelengths, the worst being around the broad emission region near 6000${\AA}$. The night sky spectrum presented here with almost complete line identifications is a useful reference for arc-independent wavelength calibrations to check the gravity flexure of the spectrograph and the wavelength shift between FeNeArHe arc frames and science frames.