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- 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 87/122
861
- CHO YOUNG JUN
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.79-80
- 1996
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We performed CCD surface photometry in B,V,R and I filters for three southern spiral galaxies:ESO598-G009,NGC1515 and NGC7456. Isophotal map, luminosity profile, ellipticity profile and position angle profile were obtained for these galaxies using SPIRAL package. The results show that one of the galaxies, ESO598-G009 has relatively large bulge component and changes in position angle due to spiral arms. The NGC7456 has very small bulges; and the isophotal map of the NGC1515 shows that it is a typical spiral galaxy with bar.
862
- HIDAYAT BAMBANG
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.455-457
- 1996
- 원문 바로보기
863
- MA YUE-HuA
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.309-311
- 1996
- 원문 바로보기
It is analysed the discrepancy about the coronal magnetic field between solar optic and solar radio using magnetic fibril concept with filling factor and fractal structure model. The magnetic field of <TEX>$\~$</TEX> 100 G considered in solar optics is mean value in a large scale, and that of <TEX>$\~$</TEX>1000 G in solar should be the value of fine structures inside 'macro' loop.
864
- KIM JONGSOO
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.167-168
- 1996
- 원문 바로보기
865
- 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.
866
- 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>.
867
- 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.
868
- LI BI-QIANG
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.299-301
- 1996
- 원문 바로보기
It. has been discovered that. active regions commonly have numerous flare-like transient. loop brightenings. We use a magnetic reconnection theory driven by a ponderamotive force on account. of the basic properties of a transient. brightening: lifetime a few mins, total energy <TEX>$10^{25}\~10^{29}$</TEX> erg. The numerical results are consistent with the observations.
869
- ANDERSEN J.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.239-240
- 1996
- 원문 바로보기
Precise masses, radii, and luminosities from eclipsing binaries and colour-magnitude diagrams for open clusters are classic tools in empirical tests of stellar evolution models. We review the accuracy and completeness required for such data to discriminate between current models and describe some recent. results with implications for convection theory.
870
- LYO A-RAN
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.65-66
- 1996
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