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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 84/122
831
- TIERSCH H.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.59-60
- 1996
- 원문 바로보기
832
- ZHANG X.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.199-200
- 1996
- 원문 바로보기
833
- KIM YONGGI
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.235-236
- 1996
- 원문 바로보기
Using a phenomenological model for the accretion onto the magnetic white dwarf, we calclliated some optical line profiles from the magnetosphere of such systems. Line profiles of these systems seem to be produced in the magnetosphere of the compact star due to the reemission of X-ray produced near the stellar surface. Some results of our new calculation and the analysis of these results will be presented. Our results show that the model used here can reproduce the observed optical line profiles and open the possiblity to determine the parameters of individual systems.
834
- CHEN ROSIE CHANG-HUI
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.135-136
- 1996
- 원문 바로보기
We present a new photometric study of the globular cluster NGC288 in Stromgren u, v, b, y, and H<TEX>$\beta$</TEX> system. This cluster is known to have an intermediate metallicity but its color-magnitude diagram has a pure blue horizontal branch, which is a signature of metal poor stellar population. We compare our dataset with Bergbusch's (1993) in both field size and CMD to see whether different photometry system would determine the same physical parameters of a cluster. Demarque and Yi's isochrones (1996, private communication) were applied to Bergbusch's dataset, and we obtained distance modulus of (m - M) = 14.9 <TEX>$\pm$</TEX> 0.2, color excess of E(B - V) = 0.03, and age of 1.5<TEX>$\pm$</TEX>3 Gyr. Vandenberg's (1985) isochrones for Stromgren system were also applied to Bergbusch's and our data. We find that the isochrone fits to different photometric systems give rather in consist ant solutions. The source of this discrepancy may become clear when the Demarque and Yi's isochrones for Johnson system are converted to those of Stromgren system. We note that Kurucz model atmospheres provide a useful ground for this conversion work as well as theoretical study of Stromgren characteristics of globular cluster stars.
835
- SUBRAMANIAN K.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.155-158
- 1996
- 원문 바로보기
Magnetic fields correlated on several kiloparsec scales are seen in spiral galaxies. Their origin could be due to the winding up of a primordial cosmological field or due to amplification of a small seed field by a turbulent galactic dynamo. Both options have difficulties: There is no known battery mechanism for producing the required primordial field. Equally the turbulent dynamo may self destruct before being able to produce the large scale field, due to excess generation of small scale power. The current status of these difficulties is discussed. The resolution could depend on the nature of the saturated field produced by the small scale dynamo. We argue that the small scale fields do not fill most of the volume of the fluid and instead concentrate into intermittent ropes, with their peak value of order equipartition fields, and radii much smaller than their lengths. In this case these fields neither drain significant energy from the turbulence nor convert eddy motion of the turbulence on the outer scale to wave like motion. This preserves the diffusive effects needed for the large scale dynamo operation.
836
- STALIN C. S.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.341-342
- 1996
- 원문 바로보기
We present here the solar LOG GF values obtained using the Liege solar at las and the standard solar photospheric models for the spectral lines in the wavelength range <TEX>${\lambda}{\lambda}$</TEX> 6209 - 6273 <TEX>${\AA}$</TEX>. These log gf values shall be used to interpret a high resolution spectra of the star <TEX>$\gamma$</TEX> Draconics.
837
- TOVMASSIAN H. M.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.393-393
- 1996
- 원문 바로보기
A new concept of a simple and cheap construction of giant telescope is described.
838
- REY Soo-JONG
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.11-14
- 1996
- 원문 바로보기
Super-inflation driven by dilaton/moduli kinetic energy is naturally realized in compactified string theory. Discussed are selected topics of recent development in string inflationary cosmology: kinematics of super-inflation, graceful exit triggered by quantum back-reaction, and classical and quantum power spectra of density and metric perturbations.
839
- KIM BONG GYU
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.193-194
- 1996
- 원문 바로보기
A large scale <TEX>$^{13}CO$</TEX>(J=1-0) survey was made for CMa OB1/R1 region in <TEX>$220^{\circ}{\le}{\iota}{\le}230^{\circ}$</TEX> and <TEX>$-10^{\circ}{\le}b{\le}10^{\circ}$</TEX> with a 8' spacing by using the 4 m radio telescope of Nagoya University. 34 isolated clouds were identified in this survey. Among them, two clouds were firstly identified by us. The observed LSR velocity indicate that almost of the all clouds are located in the Local arm, except two extreme velocity. The mass spectrum of the clouds in the Local arm is best fitted by a power-law index of 1.6.
840
- XU ZHENTAO
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.441-442
- 1996
- 원문 바로보기