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1984년 ~ 2026년까지 1,258 건의 한국우주과학회지를 계간으로 확인하실 수 있습니다.
- The Korean Space Science Society (The Korean Astronomical Society)
- 계간 (Quarterly)
- ISSN : 1225-052x (ISSN : 1225-052x)
1225-052x
- DB구축현황 : 1,258건 (DB Construction : 1,258 Articles)
총 게시글 1,258건
페이지 115/126
1141
- Lee, Chang-Hoon
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 11, n.2
- pp.232-249
- 1994
- 원문 바로보기
Since we finished the purchase of the cooled Schottky diode mixer receiver made by Radiometer Physics Co. for the 120-170GHz range in October 1991, we have not prepared the PPL hardware and software for this receiver and the ellipsolidal mirror for beam guiding. After these problems were solved, this receiver was installed at the 14m telescope in late December 1993, and used for the confirmation of a spectral line detection and the measurement of the beam efficiency. The beam efficiency is about 36% at 146 GHz.
1142
- 표유선
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 11, n.1
- pp.81-92
- 1994
- 원문 바로보기
The magnetic field measurements from the KitSat-1 and KitSat-2 were tested by comparing with the IGRF model. The magnetic data have been collected by a three-axis fluxgate magnetometer on each satellite at an latitude of 1,325 km and 820 km, respectively. To avoid highly variable magnetic disturbances at the polar region, the field map has been within the limits of 50 degrees in latitude. Each data is averaged over the square of <TEX>$5{\times}5$</TEX> degrees in both latitude and longitude. In these results, the relatively quiet periods were selected and the sampling rate was 30 seconds. It is shown that the results from these measurements are consistent with the IGRF map over the global surface map.
1143
- 이용삼
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 11, n.2
- pp.175-184
- 1994
- 원문 바로보기
초장주기 식쌍성 AZ Cas의 RI 측광관측을 1990년부터 1993년까지 3년간 연세대 학교 천문대 60 cm Goto 반사망원경으로 수행하였다. 총 관측일 수는 77일이고 관 측첨 옴 884점 이다. 매년 관측한 모든 관측값들을 가지고 표준화 등급으로 환산하여 AZ Cas의 R,l, 색지수의 광도곡선을 만들어 제시하였다. 이 광도곡선의 위상의 구간은 식현상이 없는 <TEX>$0.^p54$</TEX>~<TEX>$0.^p87$</TEX>이며, 광도곡선상에서 식 바깥에서의 광도의 변화는 나타나지 않았다.
1144
- Kang, Young-Woon
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 11, n.1
- pp.31-40
- 1994
- 원문 바로보기
The IUE low dispersion spectra of AZ Cas have been analyzed for line identifications and energy distribution in ultraviolet region. Highly ionized atoms, SiIV and CIV are identified. We could infer a temperature range of the B star between 15,000K and 20,000K. The energy density distribution shows a hump between IUE short wavelength and long wavelength regions. Photometric and spectroscopic elements were revised based on the Florkowisk photeelectric observations and collected radial velocities. The temperature of both stars were reduced as 16,000K and 3,800K. The radii of both stars are <TEX>$10 R_{\odot}\;and\;320R_{\odot}$</TEX>. The eccentricity and longitude of periastron are 0.61 and <TEX>$10.5^{\circ}$</TEX>, respectively.
1145
- 송두종
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 10, n.2
- pp.163-188
- 1993
- 원문 바로보기
적색편이 공간에서 보이는 국부 요동지역 주변의 초면은 프리이드만 배경 우주에 포함된 툴만 시공간 모형 관점에서 보면 국부 중력장에 유도된 국부 팽창율이 원인이 됨을 알고 있다. 초면은 국부적인 것으로서 요동지역에 포함된 질량에 크게 지배되고 물질들의 동력학적 상태와 밀접한 관계가 았다. 은하단의 밀도 분포 모형으로 광학 관측과 X-선 관측을 잘 맞추는 아벨 윤곽과 폴리트로프적 밀도 분포 윤곽을 택하여 틀만 시공간 모형으로 계산한 적색편이 공간에 나타나는 초면과 코마 은하단과 페르세우스 은하단 성분은하들에서 관측되는 적색편이-중심거리 형태와 비교하였을 때, 초면은 은하단의 크기와 질량에 한계값을 설정할 수 있었고, 뜨거운 기체의 물질 상태를 짐작할 수 있는 단서를 제공한다.
1146
- Suh, Kyung-Won
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 10, n.1
- pp.25-35
- 1993
- 원문 바로보기
Stars lose their masses constantly after their birth, but the stellar mass loss is especially prominent in the last stages of their lives. It has been believed that red superginats are losing their masses at rates of 10-8∼10-4M/yr. They are known to be asymptotic giant branch stars that are at the end stages of the evolution for the stars with zero age main sequence masses of 1∼10M. Red supergiants are often characterized by the thick dust envelopes and large amplitude pulsations. According to their energy spectra, chemical composition, they are divided into three main group; M-type Miras, C-type carbon stars, and OH/IR stars. The purpose of this work is to clarify the evolutionary aspects in the physical parameters of the red supergiants mainly from the direct interpretation of their infrared spectra.
1147
- 이현주
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 10, n.1
- pp.17-27
- 1993
- 원문 바로보기
The orbit characteristics and perturbation effects of an artificial satellite with critical inclination have been studied. The critical inclination problem in artificial satellite theory is treated as Ideal Resonance Problem(IRP). The KITSAT-1 satellite launched by Arian 42P at Guiana in August 11, 1992 has orbital inclination close to the critical value cos-1(1/√5). In that case, there is a singularity in some perturbation terms and perigee of the orbit is fixed because d<TEX>$\omega$</TEX>/dt is theoretically equal to zero. But actually the long periodic behaviour in argument of perigee, <TEX>$\omega$</TEX> shows a small oscillation. The causes of the oscillation and the relativistic effect in IRP have been studied and applied to the KITSAT-1. The geo-potential perturbation terms which are seperated inclination terms have been obtained using Algebraic manipulation. Also luni-solar disturbing funtion based on the relative position of the sun, moon, and satellite has been obtained. Phase portraits are used to depict the change of eccentricity and grgument of perigee. The variations of each orbital elements have been obtained in case of the KITSAT-1.
1148
- Lee, Byoung-Sun
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 10, n.1
- pp.1-16
- 1993
- 원문 바로보기
Three typer of spin-axis attitude determination program for the geosynchronous transfer orbit spacecraft are developed. Deterministic closed-from algorithm, batch least-square algorithm and stabilized Kalman filter algorithm are used for implemetation of three programs. EUROSTAR bus model from British Aerospace is used for attitude sensor modelling. Attitude determinations using three programs are performed for the simulated sensor data according to INMARSAT 2-F1 prelaunch mission analysis.
1149
- 이우백
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 10, n.1
- pp.94-102
- 1993
- 원문 바로보기
소백산천문대의 61cm 망원경에 사용하기 위하여 광섬유를 이용한 다중채널 광전측광기를 개발하였다. 이 측광기의 채널간 광전송 효율 차이를 검증하기 위한 시험관측을 실시한 결과 큰 차이가 없음을 알았다. 또한 관측 정밀도 및 효율을 검증하기 위하여 W UMa형 식쌍성인 BV Dra를 관측한 결과 측광기가 매우 안정되어 있으며 관측정밀도도 향상되었음을 알았다. 관측 효율은 단일채널 측광기에 비하여 매우 향상되어, 하나의 필터를 사용하는 관측의 경우 적어도 5배의 관측자료를 얻을 수 있었다.
1150
- Kim, Yong-Gi
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 10, n.2
- pp.113-122
- 1993
- 원문 바로보기
Using a simple analytic model based on the MHD stability arguments we obtain the size of the magnetosphere for the magnetic compact stars. We assume the ordered, field-aligned flow in the magnetosphere and estimate the wellknown Alfven radius. The dependence of the X-ray absorption in the magnetic funnel on the size of this radius is further considered. We show that such a determination of the magnetic interaction radius can be applied to the reconstruction of X-ray light curves of the magnetic binary stars.