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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 98/122
971
- YAMAOKA HITOSHI
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.213-214
- 1996
- 원문 바로보기
We are promoting a supernova(SN) search project with medium size (60cm-105cm) telescopes belonging to public observatories in Japan. The main purpose is to measure the SNe Ia rate, which plays an important role in the chemical and dynamical evolution of galaxies. We expect to measure the SN rate in E/SO galaxies within the <TEX>$35\%$</TEX> error after 2 years run, and the longer run will give the smaller error.
972
- GUHATHAKURTA PURAGRA
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.139-140
- 1996
- 원문 바로보기
973
- LEE C. W.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.161-163
- 1996
- 원문 바로보기
We have studied the response of molecular clouds in the Galactic disk to a rotating bar by conducting Smoothed Particle Hydrodynamics (SPH) simulations for the Galaxy in order to understand the dynamical structures of the Galactic Center (GC) molecular clouds, and their implications. In our study it was found that the structures of GC molecular clouds could be induced by the combined effects of rotating bar potential, the hydrodynamic collisions and gravitational miss collisions between the clouds.
974
- AI GUOXIANG
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.415-418
- 1996
- 원문 바로보기
Space Solar Telescope (SST) is a space project for solar research, its main parameters are that total weight 2.0T, sun synchronous polar circular orbit, altitude of the orbit 730KM, 3 axis stabilized attitude system, power 1200W, telemetry of the downlink rate 30Mb/s, size <TEX>$5{\ast}2{\ast}2\;M^3$</TEX>, mission life 3 years. It is expected it will be launched in 2001 or later. The main objective is structure and evolution of solar vector magnetic field with very high spatial resolution. The payloads are consisted of 6 instruments: Main optical telescope with 1-M diameter and diffraction limited resolution 0.1 arc second, EUV imaging telescope with a bundle of four telescopes and 0.5 arc second resolution, spectrometric optical coronagraph, wide band spectrometer, H-alpha and white light telescope and solar and interplanetary radiospectrometer. An assessment study between China and Germany is under operation.
975
- 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.
976
- YOSHIDA S.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.381-383
- 1996
- 원문 바로보기
A new CCD camera equipped with a large format chip is now under construction for the Kiso 105-cm Schmidt telescope. We use SITe TK2048E, of which pixel size is 24 <TEX>${\mu}m$</TEX> and chip size is 48 mm square. TK2048E is thinned back-illuminated so that it has high sensitivity in U-band. The chip is cooled by a refrigerator instead of liquid nitrogen. MESSIA III is used as CCD control system.
977
- KANG IVIIN-YOUNG
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.263-264
- 1996
- 원문 바로보기
We have solved the radiative transfer problem using a Sobolev approximation with an escape probability method in case of the supersonic expansion of a stellar envelope to an ambient medium. The radiation from the expanding envelope turns out to produce a P-Cygni type profile. In order to investigate the morphology of the theoretical P-Cygni type profile, we have treated <TEX>$V{\infty},\;V_{sto},\;{\beta}$</TEX> (parameter for the velocity field), M and <TEX>$\epsilon$</TEX> (parameter for collisional effect) as model parametrs. We have found that the velocity field and the mass loss rate affect the shapes of the P-Cygni type profiles most effectively. The secondarily important factors are <TEX>$V{\infty},\;V_{sto}$</TEX>. The collisional effect tends to make the total flux increase but not so .much in magnitude. We have infered some physical parameters of 68 Cyg, HD24912, and <TEX>$\xi$</TEX> persei such as V<TEX>$\infty$</TEX>, M from the model calculation, which shows a good agreement with the observational results.
978
- WANG M.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.337-338
- 1996
- 원문 바로보기
The long quasi-periodic (several tens of seconds) pulsations were observed at. short decimetric wavelength (1.42 and 2.00 GHz). Here, we introduce the features (about bandwidth, periodicity, amplitude and relative amplitude) of these pulsations, then give the discussion about them.
979
- 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.
980
- 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.