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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 93/122
921
- MESZAROS A.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.43-43
- 1996
- 원문 바로보기
922
- BYUN YONG-IK
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.125-126
- 1996
- 원문 바로보기
Beijing-Arizona-Taipei-Connecticut (BATC) survey is a long term project to map the spectral energy distribution of various objects using 15 intermediate band filters and aims to cover about 450 sq degrees of northern sky. The SED information, combined with image structure information, is used to classify objects into several stellar and galaxy categories as well as QSO candidates. In this paper, we present a preliminary setup of robust data reduction procedure recently developed at NCU and also briefly discuss general classification scheme: redshift estimate, and automatic detection of variable objects.
923
- 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.
924
- 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.
925
- ZHOU HONGNAN
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.363-364
- 1996
- 원문 바로보기
926
- REY SOO-CHANG
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.137-138
- 1996
- 원문 바로보기
The first large-format CCD color-magnitude diagram (CMD) in the B and V passbands is presented for the Galactic globular cluster M53 (NGC 5024). We have discovered 117 new blue straggler (BS) candidates in the field of M53. The analysis of bright BS stars (V <19.0) clearly shows a bimodal radial distribution, with a high frequency in the inner and outer regions. The distribution is similar to that found in M3, a globular cluster with similar central density and concentration.
927
- CHO SE-HYUNG
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.261-262
- 1996
- 원문 바로보기
Nearly simultaneous observations for <TEX>$^{28}SiO$</TEX> v=0, 1, 2, J =3-2 transitions in 39 late-type stars have been carried out in February 1995 and 1996 with the 14 m radio telescope at Taeduk Radio Astronomy Observatory (TRAO). Observations for <TEX>$^{28}SiO$</TEX> v=0, 1, 2, J=2-1 lines in the same objects have been also carried out in March 1995 and March-April 1996. The detection rate of <TEX>$^{28}SiO$</TEX> v=l, J=3-2 line for the <TEX>$^{28}SiO$</TEX> v=l, J=2-1 sources was <TEX>$59\%$</TEX>. Seventeen new detections in the <TEX>$^{28}SiO$</TEX> v=l, J=3-2 transition and 4 new detections in the <TEX>$^{28}SiO$</TEX> v=2, J=3-2 transition have been reported including the intensity ratios within the vibrational ladders and rotational states.
928
- 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.
929
- GARDINER LANCE T.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.93-94
- 1996
- 원문 바로보기
The Galaxy and the Large and Small Magellanic Clouds (LMC and SMC respectively) form a triple system of mutually interacting galaxies. We have carried out a set of N-body simulations on the gravitational interaction of the SMC with the Galaxy and the LMC in order to model prominent features such as the Magellanic Stream, the inter-Cloud Bridge, and the large depth of the SMC which are thought to be products of the tidal interactions among the members of this system.
930
- 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.