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유경노 한국지구과학회 1984 韓國地球科學會誌 Vol.5 No.1
N-logM diagrams of 29 open clusters are obtained by, using observational data and theoretical evolutionary track of stars on M_(bol)-T_(eff) diagram. A certain relation between the forms of N-logM diagrams and their ages are found. And a temporary interpretation is given for it.
조선왕조실록(朝鮮王朝實錄)에 기재된 Kepler초신성(超新星)의 관측기록
유경노,Yu, Gyeong-No 한국천문학회 1990 天文學論叢 Vol.5 No.1
Wangjo Silok, the official chronicle of Lee Dynasty, carries 131 records on the Kepler Supernova 1604; all of them are given in the present report. Among them 112 records are detailed descriptions about the observed brightness variation over the period from October 13, 1604 (the 37th year of King Sunjo) to April 23, 1605. On July 14, 1605, an addendum is given as a final assessment of the guest star incidence. Since the apparent brightness, size and position are carefully described as compared to bright planets and stars, these records are ideal for retrieving light curve of the Kepler Supernova over the seven month period. Simple procedures are suggested for the derivation of light curve.
유경노,Yu, Kyung-Loh 한국천문학회 1973 Journal of The Korean Astronomical Society Vol.6 No.1
A simple model of the galactic mass distribution consisting of one sphere and two spheroids with different eccentricities is considered. The resulting model is found to be consistent with the recent observations of the galactic rotation as well as suggested shape of the Galaxy.
은하성단(銀河星團)의 광도함수(光度函數)에 관(關)한 연구(硏究)-I
유경노,Yun, Kyung-Loh 한국천문학회 1976 Journal of The Korean Astronomical Society Vol.9 No.1
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.
은하계(銀河系)의 질량분포(質量分布) 모형(模型)-III
유경노,강용희,Yu, Kyung-Loh,Kang, Yong-Hee 한국천문학회 1975 Journal of The Korean Astronomical Society Vol.8 No.1
Densities of the three constituent spheroids of the same eccentricity as our earlier model of the Galaxy are assumed to be given by an analytical form of $_{{\rho}i}$(r)=$k_ie^{-m_ir^u{_i}}$, where $k_i,\;m_i$, and ${\alpha}i$ are obtained by comparing with the results of the previous model. Using three values of $_{{\rho}i}$(r) the galactic rotation curve, mass of each spheroid and the whole Galaxy are calculated, and the three dimensional density distribution in the Galaxy is also obtained. The calculated rotation curve of the model Galaxy is in good agreement with the observed curve, and the shape of the cross section of the model Galaxy given by the computed density is very similar to the inferred shape of the spiral galaxies.
Pleiades와 h and x Persei 성단(星團) 둘레의 HI gas clouds의 가원(加速)에 관(關)한 연구(硏究)
유경노,Yu, Kyung-Loh 한국천문학회 1968 Journal of The Korean Astronomical Society Vol.1 No.1
By comparison and analysis of the optical data of the two galactic clusters of Pleiades and h and x Persei and the radio data of the HI gas clouds which are related with those two clusters, the relative motions of those gas clouds with retpect to the two clusters were obtained. The three theories on the acceleration of HI gas cloud surrounding a star cluster by Blaauw. Oort and Spitzer, and Kahn were examined with the above obtained kinetic data of the Pleiades and the h and x Penei clouds. And it was shown that Blaauw's theory is applicable to the h and x Persoi clouds but not to the Pleiades, that Dart and Spitzer's theory can explain the motions of both clouds, and that Kahn's theory needs more improvement to be a complete one.