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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 99/122
981
- NARLIKAR JAYANT V.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.1-5
- 1996
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Recent discussions of observational constraints on the standard hot big bang model are reviewed and it is argued that now there is room for considering alternative cosmologies. The quasi-steady state cosmology is briefly described. This model seems to explain most of the observed features of the universe, including the m-z relation, radio source count, the light nuclear abundances and the microwave background.
982
- EHGAMBERDIEV SH. A.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.287-289
- 1996
- 원문 바로보기
IRIS(International Research on the Interior of the sun) is the name of a worldwide network of 6 stations for whole disc Doppler shift measurements. The network has been operating since 1987 and by now a few series of a hundred days long unbroken (by day/night periodicity) data were received. Analysis of these data allowed to receivesome new results which are discussed in the paper.
983
- RYU DONGSU
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.25-26
- 1996
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In the standard theory of the large scale structure formation, matter accretes onto high density perturbations via gravitational instability. Collision less dark matter forms caustics around such structures, while collisional baryonic matter forms accretion shocks which then halt and heat the infalling gas. Here we discuss the characteristics. roles, and observational consequences of these accretion shocks.
984
- LYO A-RAN
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.65-66
- 1996
- 원문 바로보기
985
- IWASAKI KYOSUKE
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.357-358
- 1996
- 원문 바로보기
Reanalysis of the observations of Mars made at the Hida Observatory in 1975 with a new image processing method is reported. Red filter images taken in the period before vernal equinox (areocentric longitude of the sun Ls=<TEX>$0^{\circ}$</TEX>) revealed dark surface features at the northern high latitudes, while blue filter images taken at the same time showed the extensive polar hood. The latitude of the northernmost feature observed was about <TEX>$67^{\circ}$</TEX>N. An extensive north polar cap, which is predicted by most of the existing models and observed with Viking, did not exist in our reanalyzed images obtained at the Hida Observatory in 1975.
986
- LEE SANG-GAK
- Journal of the Korean astronomical society = 천문학회지
- 29, n.2
- pp.157-170
- 1996
- 원문 바로보기
In order to determine the metallicity of a globuar cluster, M3,by using the spectral indices, a kind of index grid has been establshed by stars in globular clusters, M3, M15, M71 and old open cluster, NGC 188. The indices were measured from the medium resolution spectra of about <TEX>$2{\AA}$</TEX>. The summed indices were used to determine metallicity in order to increase signals. It is found that the core depth index is measured more accurately and leads result more accurate than the pseudo-equivalent width index. This method can be further improved by including many more calibration globular clusters of various metallicity to make finer grids. By this method, the metallicity of M3 is determined as <TEX>$[Fe/H] = -1.46\pm0.15$</TEX>.
987
- LEE MYUNG GYOON
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.67-68
- 1996
- 원문 바로보기
988
- MAKOTO INOUE
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.419-420
- 1996
- 원문 바로보기
The VLBI Space Observatory Program (VSOP) is a worldwide project of one radio telescope in space with many ground radio telescopes. The concerted space VLBI network enables us to reveal high resolution and high quality images of radio sources. The space radio telescope is anticipated to be launched in January/February 1997, and collaborative observations have been coordinated. The basic parameters of the system and present status are given.
989
- AGRAWAL P. C.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.429-432
- 1996
- 원문 바로보기
An x-ray astronomy experiment consisting of three collimated proportional counters and an X-ray Sky Monitor (XSM) was flown aboard the Indian Satellite IRS-P3 launched on March 21, 1996 from SHAR range in India. The Satellite is in a circular orbit of 830 km altitude with an orbital inclination of <TEX>$98^{\circ}$</TEX> and has three axis stabilized pointing capability. Each pointed-mode Proportional Counter (PPC) is a multilayer, multianode unit filled with P-10 gas (<TEX>$90\%$</TEX> Ar + <TEX>$10\%\;CH_4$</TEX>) at 800 torr and having an aluminized mylar window of 25 micron thickness. The three PPCs are identical and have a field of view of <TEX>$2^{\circ}{\times}2^{\circ}$</TEX> defined by silver coated aluminium honeycomb collimators. The total effective area of the three PPCs is about 1200 <TEX>$cm^2$</TEX>. The PPCs are sensitive in 2-20 keV band. The XSM consists of a pin-hole of 1 <TEX>$cm^2$</TEX> area placed 16 cm above the anode plane of a 32 cm<TEX>$\times$</TEX>32 cm position sensitive proportional counter sensitive in 3-8 keV interval. The position of the x-ray events is determined by charge division technique using nichrome wires as anodes. The principal objective of this experiment is to carry out timing studies of x-ray pulsars, x-ray binaries and other rapidly varying x-ray sources. The XSM will be used to detect transient x-ray sources and monitor intensity of bright x-ray binaries. Observations of black-hole binary Cyg X-1 and few other binary sources were carried out in early May and July-August 1996 period. Details of the x-ray detector characteristics are presented and preliminary results from the observations are discussed.
990
- JEONG K. S.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.181-182
- 1996
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