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1968년 ~ 2024년까지 1,211 건의 한국천문학회지를 격월간 확인하실 수 있습니다.
- The Korean Astronomical Society (The Korean Astronomical Society)
- 계간 (Quarterly)
- ISSN : 1225-4614 (ISSN : 1225-4614)
1225-4614
- DB구축현황 : 1,211건 (DB Construction : 1,211 Articles)
총 게시글 1,211건
페이지 96/122
951
- KIM SANG-JOON
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.347-350
- 1996
- 원문 바로보기
Spectroscopic data between 7 and 15 microns obtained in 1979 by Voyager 1 and 2 Infrared Interferometer Spectrometer (IRIS) have been revisited. Using the spectral data, Jupit.er images have been constructed at the emission bands of hydrocarbons, such as methane, ethane, and acetylene. The resultant. images show differences in emission intensities in the polar regions, suggesting inhomogeneous distributions of the hydrocarbons over the auroral regions of Jupiter.
952
- ANDERSEN J.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.127-128
- 1996
- 원문 바로보기
The solar neighbourhood is the starting point for studies of the structure and evolution of the Galactic disk. Yet, our knowledge of the relative frequencies, distances, ages, chemical abundances, velocities, and birthplaces of the nearby stars is severely incomplete. We have determined complete, homogeneous, and precise such data for a kinematically unbiased sample of <TEX>$\~$</TEX>12,000 local F and G dwarf stars and describe a first, significant result from it.
953
- DHURANDHAR S. V.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.273-276
- 1996
- 원문 바로보기
The world wide efforts for detecting gravitational waves, the detectors in vogue and the expected astrophysical sources of gravitational waves will be discussed. Ground based detectors especially, the resonant bar detectors and laser interferometers will be described with a brief mention of the space based detector (the LISA project). Astrophysical sources of gravitational waves such as coalescing binaries, supernovae, pulsars/ rotating neutron stars, stochastic background will be discussed in the context of detection.
954
- CHEN P. S.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.257-258
- 1996
- 원문 바로보기
1607 OH/IR stars associated with IRAS sources are assembled and the IRAS LRS spectra of 980 OH/IR stars are examined in this paper. The nature of the circumstellar dust for these sources is classified. The distributions of these subgroups of OH/IR stars in the IRAS color-color diagram and the period-color diagram are interpreted with their evolutionary status. The Galactic and the velocity distributions of these subgroups of OH/IR stars are also presented. The correlations among the expanding velocities of the envelopes, colors, periods and the pumping efficiencies for subgroups of OH/IR stars are investigated to outline the evolutionary status of OH/IR stars.
955
- DEHGHANI M. H.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.285-286
- 1996
- 원문 바로보기
A systematric method of exploring the 'geometrical' and 'non-geometrical' constants of the motion for an arbitrary spacetime is presented. This is done by introducing a series of coupled differential equation for the generators of the symmetry group of Vlasov's equation. The method is applied to the case of the maximaly symmetric spectime, and the geometrical and non-geometrical constants of motion are obtained.
956
- STALIN C. S.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.343-344
- 1996
- 원문 바로보기
Solar IR spectra have been utilised by us to derive log gf values for atomic lines due to 17 chemical elements. in the J and H bands, i.e. in the wavelength ranges 1.00 - 1.34 <TEX>${\mu}m$</TEX> and 1.49 - 1.80 <TEX>${\mu}m$</TEX> respectively. The observed central line depths were based on the FTS atlases published at. Liege and KPNO. We also reprot new log gf values for 51 lines for which neither theoretical nor experimental values are available till date.
957
- TOBIN WILLIAM
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.89-91
- 1996
- 원문 바로보기
Within the next few years eclipsing binaries should yield primary distance measurements for the Magellanic Clouds as well as provide tests of theoretical low-metallicity stellar models.
958
- GUHATHAKURTA PURAGRA
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.139-140
- 1996
- 원문 바로보기
959
- VERMA V. K.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.391-392
- 1996
- 원문 바로보기
We have developed and tested a CCD camera (100 <TEX>$\times$</TEX> 100 pixels) system for observing Ha images of the solar flares with time resolution> 25 msec. The 512 <TEX>$\times$</TEX> 512 pixels image of CCD camera at 2 Mpixels/sec can be recorded at the rate of more than 5 frame/sec while 100 <TEX>$\times$</TEX> 100 pixels area image can be obtained 40 frames/sec. The 100 <TEX>$\times$</TEX> 100 pixels image of CCD camera corresponds to 130 <TEX>$\times$</TEX> 130 arc - <TEX>$sec^2$</TEX> of the solar disk.
960
- KIM SEUNG-LEE
- Journal of the Korean astronomical society = 천문학회지
- 29, n.1
- pp.43-51
- 1996
- 원문 바로보기
We present test results of time-series CCD photometry to investigate the photometric precision of the BOAO (Bohyunsan Optical Astronomy Observatory) 1.8m telescope. A well-known field of the old open cluster M67, which includes two pulsating blue stragglers and two W UMa type binaries, was monitored for 3.5 hours on February 22, 1996. We have collected 148 V frames and 3 B frames. Photometric noises which consist mainly of photon noise and scintillation noise, were lowered down to about 1.9 mmag for stars of <TEX>$10.\;^m5$</TEX> in M67 with exposure time of 20 seconds. From the C-M diagram for M67, a number of observational properties were derived; E(B-V) = 0.03, (V-Mv)o = 9.6, Age = 4 Gyr. We obtained light curves for four known variable stars and confirmed their variational characteristics. The pulsating blue stragglers show a low amplitude (about 0.01 mag) of light variation.