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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 83/122
821
- BUDDlNG E.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.205-208
- 1996
- 원문 바로보기
Multi-wavelength observing has been particularly fruitful in cool star research. There have been some well-observed examples, eg AB Dor, though ambiguity remains. This raises issues of data information content and model parameter determinacy, which are examined firstly in an optical context. We then widen the discussion to show how multi-site and multi-wavelength data can be combined to point to better constrained models. Particular cases, involving near-simultaneous radiometry and photometry, are discussed to clarify such modelling.
822
- SHAMSHIEV FAZILIDDIN T.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.73-74
- 1996
- 원문 바로보기
This paper deals with steady-state gravitational potentials of nonaxisymmetric three dimensional systems which rotate with a constant angular velocity. For these systems a class of potentials with local integrals has been found.
823
- BESKIN G. M.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.251-252
- 1996
- 원문 바로보기
824
- YERSHOV V. N.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.385-386
- 1996
- 원문 바로보기
A wide-field CCD detector for solar eclipse observations is discussed. The CCD is supposed to be of a moderate size, and the image of the corona is obtained by scanning the field of view. Results of the 1995 solar eclipse observation are shown which have been made with a prototype of the scanning CCD detector.
825
- KOMAROVA V. N.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.217-218
- 1996
- 원문 바로보기
The results of the Crab pulsar observations with the photometrical MANIA (Multichannel Analysis of Nanosecond Intensity Alterations) complex at the 6-m telescope are presented. More than 12 millions photons in UBVR-bands simultaneously with time resolution of <TEX>$10^{-7}s$</TEX> were detected. Using the original software for search for optical pulsar period, we obtained the light curves of the object with time resolution of about 3.3 <TEX>${\mu}s$</TEX>. Their detailed analysis gives the spectral change during pulse and subpulse, the shape of the pulse peaks, which are plateaus (with the duration of about 50<TEX>${\mu}s$</TEX> for the main pulse), limits for an amplitude of fine temporal (stochastic and regular) structure of pulse and sub pulse and the interpulse space intensity. The results of CCD-spectroscopy of the Crab pulsar show that its summarized spectrum is flat. There are no lines, neither emission nor absorbtion ones. Upper limit for line intensity or depth is <TEX>$3.5\%$</TEX> with the confidence probability of <TEX>$95\%$</TEX>.
826
- SANGUANSAK N.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.169-170
- 1996
- 원문 바로보기
In the past, it. was very difficult to distinguish thermal and non-thermal emission. Broadbent et a1. (1989) has developed a new technique with the help of the IRAS 60 micron emission. The distribution of non-thermal or synchrotron emission in the Galactic disk has been modeled from the 408 MHz all sky survey of Haslam et a1. (1982) after removal of the thermal component.. At. 408 MHz, t.here is very little absorption in the interstellar medium and the distribution along the line-of-sight. is inferred mainly from its presumed relationship to other tracers of spiral structure via a. number of fitted parameters. But. at lower frequencies, free-free absorption becomes important and can give some direct. information on the line of sight. distribution. We have modeled the thermal electron density according to the spiral arm models and the distribution of ionized hydrogen in the Galactic plane by Lockman (1976) and Cersosimo et. al. (1989) and have made predictions to compare with the surveys of Dwarakanath et al. (1990) at. 34.5 MHz and .Jones and Finlay (1974) at 29.9 MHz. The result confirms that the absorption model of the synchrotron emissivity in the Galactic plane is broadly corrected and illustrates the potential of the absorption technique.
827
- YUN H. S.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.339-340
- 1996
- 원문 바로보기
In the present study we examine physical characteristics of a thin and rigid magnetic flux tube with a steady flow inside, which is embedded vertically upward in the solar atmosphere. We found from this study that (1) The downward material flow gives rise to a dominant heating in the flux tube which works with the conductive heating in the same direction. However, the upflow flow creates a dominant cooling which works against the conductive heating, resulting in a steeper temperature gradient with a shallower transition region. (2) Since the thickness of the transition region determines the material content in the transition region, a broader transition region of the downflow tube produces a larger differential measure.
828
- ZHOU HONG NAN
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.443-444
- 1996
- 원문 바로보기
From 146 B.C. to A.D. 1760, 363 sets of cometary observations have been recorded in Chinese Ancient Records of Celestial Phenomena. The positions of all recorded comets, or their paths, on the sky are compared. Taking into account the perturbations of all nine planets and using the numerical method of N-body problem, the orbits of well-recorded comets are calculated. Identification of a periodic comet is presented.
829
- YUAN Q. R.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.55-56
- 1996
- 원문 바로보기
In order to investigate the spatial orientation of the spin vectors of galaxies in the Virgo cluster, we carried out a detailed identification of all the certain and possible member disk galaxies with four UK Schmidt Telescope (UKST) III a-j direct plates digitized by the Automated Plate Measuring System (APM). As a result, a relatively large and complete database with no selection effect of the member galaxies has been established. We provide the APM measured values of the position angle (P.A.) and diameters at the isophotal level of 24.5 <TEX>$m_j / arcsec^2$</TEX>. Based on this newly generated database, an initial study on the spatial orientation of the spin vectors of galaxies in the Virgo cluster is shown.
830
- KWON SUK MINN
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.197-198
- 1996
- 원문 바로보기
We have carried out <TEX>$^{13}CO$</TEX> J = 1 <TEX>$\to$</TEX> 0 line observations with spatial resolution of 2' toward 17 small globules selected from the catalogue of Clemens & Barvainis (1988) with a selection criterion of [b] <TEX>$\ge$</TEX> 15 degrees using the Nagoya 4-m radio telescope. Overall characteristics and physical parameters are presented and discussed by examining the <TEX>$^{13}CO$</TEX> integrated intensity map for each of the globules.