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1968년 ~ 2025년까지 1,227 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 : 1,227건 (DB Construction : 1,227 Articles)
총 게시글 1,227건
페이지 86/123
851
- ARIMOTO JUN'ICHI
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.107-108
- 1996
- 원문 바로보기
VRI bands CCD photometric observations of the BL Lac object OJ 287 have been carried out during the period from October, 1994 to May, 1996. OJ 287 underwent two major outbursts during our observations. The first peak (V14.0 mag.) occurred in the first half of November, 1994 and faded out to 16.5 mag within 150 days. The second peak (14.0 mag.) was observed in late December, 1995. The latter peak continued at nearly the same brightness until May, 1996. Such a long lasting outburst has never been reported for OJ 287. Color indices (V - R and V-I) remained nearly constant during the outbursts.
852
- KOZAI YOSHIHIDE
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.279-280
- 1996
- 원문 바로보기
This paper reports on the outline and the status of the TAMA-300 project, the 300 meter laser interferometer gravitational wave detector developed by a team of scientists of several research institutes and universities in Japan. In fact the project has been funded and its construction started at the National Astronomical Observatory, Mitaka, in spring 1995. And the constructions of the tunnels for the east-west and north-south arms and of the central building are completed and a half of pipes for laser beams were brought in. Very stable laser oscillator has been almost completed and mew techniques such as vibration isolations, recycling of laser power, and suspension of mirrors by double pendulums have been developed. In fact the purposes of the project are to establish techniques necessary for future km-class detectors and to operate the detector to catch possible gravitational wave events in nearby galaxies such as Andromeda, the target sensitivity being <TEX>$3 {\times} 10^{-21}$</TEX> at 300Hz.
853
- Qu Z. Q.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.307-308
- 1996
- 원문 바로보기
854
- MOON Y-J.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.323-324
- 1996
- 원문 바로보기
In the present work we introduce a new flare activity indicator, MAD and examine its characteristics by analyzing a set of successive three days' observations of a typical active region, AR2372. The computed MAD is compared with conventional activity indicator such as separator. It is found that. (1) MAD traces very well the separator, (2) it. singles out. local discontinuity of magnetic field lines and (3) it. is a good measure of describing the evolutionary status of active region.
855
- HOJAEV A. S.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.411-412
- 1996
- 원문 바로보기
We present the update information on the International Radio Astronomy Observatory Suffa project and describe the original design of new 70-m radiotelescope RT-70 for millimeter astronomy as well. Some oreographic, seeing and climatic features of Suffa are also given.
856
- LEE SANG-GAK
- Journal of the Korean astronomical society = 천문학회지
- 29, n.2
- pp.171-179
- 1996
- 원문 바로보기
We have obtained the J K images of the central region of the globular cluster M3 (NGC5272), using the <TEX>$256\pm256$</TEX> InSb array. We present JK photometry of bright red giant branch stars in the central <TEX>$2'.2\pm2'.2$</TEX> region of M3. The infrared color-magnitude diagrams are presented. The comparison of the red giant branch of M3 with that of M13 confirms that both globular clusters have similar metal abundances.
857
- HANDA T.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.395-396
- 1996
- 원문 바로보기
We developed a telescope control system called ASTROS for the VST1 and VST2, which are specially designed radio telescopes to make a survey and have a 60-cm main dish. ASTROS is designed on the distributed intelligence concept and structurized programming. The hardware of the system is composed of several intelligent devices connected with de facto standard interfaces and main control unit is PC. The program is coded in the C language and its structure is object oriented in order to make easy to replace the component devices. ASTROS is now running on two twin telescopes, VST1 and VST2. VST1 is installed at Nobeyama in Japan and VST2 is installed at La Silla in Chile. They are making a galactic plane survey in CO (J=2-1) with 9 arcmin beam semi-automatically.
858
- LIN GUAN-QING
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.401-402
- 1996
- 원문 바로보기
859
- Hul F. X.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.53-54
- 1996
- 원문 바로보기
Based on the database of 128 disk galaxies (66 SO, 62 S and Irr) mailnly compiled from Kent and Gunn (1982) and Doi et a1.(1995) which is complete down to m < 15.6 mag within a radius of <TEX>$3^{\circ}$</TEX>, the orientation of spin vectors of disk galaxies of the Coma cluster has been analyzed. The results confirm the morphological dependence of the orientation of disk galaxies found from the analsis of the Virgo cluster. Common features of orientation of disk galaxies of both clusters are outlined.
860
- HEILES CARL
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.151-154
- 1996
- 원문 바로보기
We examine the observations of large-scale magnetic fields in the Universe. We begin at the largest scale with clusters of galaxies and work our way down through galaxies and finally to the Milky Way. on which we concentrate in detail. We examine the observations of the Galactic magnetic field, and their interpretation, under the philosophy that the Galactic magnetic field is like that in other spiral galaxies. We use pulsar data. diffuse Galactic synchrotron emission, and starlight polarization data to discuss the Galaxy's global magnetic configuration and the uniform (<TEX>$B_u$</TEX>), random (<TEX>$B_r$</TEX>), and total (<TEX>$B_t$</TEX>) components of the field strength. We find disagreement among conclusions derived from the various data sets and argue that the pulsar data are not the best indicator for large-scale Galactic field. Near the Solar circle, we find that the azimuthal average of <TEX>$B_t$</TEX> is 4.2<TEX>$\mu$</TEX>G and we adopt <TEX>$B_u\~$</TEX>2.2 and <TEX>$B_r\~3.6{\mu}G$</TEX>. <TEX>$B_t$</TEX> is higher in spiral arms, reaching <TEX>$\~5.9{\mu}G$</TEX>. <TEX>$B_t$</TEX> is higher for smaller <TEX>$R_{Gal}$</TEX>, reaching <TEX>$\~8.0{\mu}G$</TEX> for <TEX>$R_{Gal}$</TEX> = 4.0 kpc. The pattern of field lines is not concentric circles but spirals. The inclination of the magnetic spiral may be smaller than that of the Galaxy's spiral arms if our sample, which refers primarily to the interarm region near the Sun, is representative. However, it is not inconceivable that the local field lines follow the Galaxy's spiral pattern, as is observed in external galaxies.