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- 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 87/123
861
- ZHOU HONGNAN
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.363-364
- 1996
- 원문 바로보기
862
- RAN YANBEN
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.439-440
- 1996
- 원문 바로보기
The Chinese ancient accounts of timing observations of 48 lunar eclipses and the secular variation of the Earth's spin speed are discussed. A series of <TEX>${\Delta}$</TEX>T expressing the secular deceleration of the Earth's rotation was obtained. The average increase rate of length of the day is about 1.5 milliseconds per century.
863
- 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.
864
- 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.
865
- KHOSROSHAHI H. G.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.277-278
- 1996
- 원문 바로보기
In attempts to detect gravitational waves, the response of some celestial systems such as the earth[l] or binary systems[2] to such waves have been investigated. Following this line of thought, here we study the possibility of excitation of the oscillation modes of a polytropic star by gravitational radiation and calculate the relevant absorption cross sections.
866
- LEE YOUNGUNG
- Journal of the Korean astronomical society = 천문학회지
- 29, n.2
- pp.107-117
- 1996
- 원문 바로보기
We have studied the star forming activities and dust properties of Lynds 1251, a dark cloud located at relatively high galactic latitude. Eleven IRAS point sources identified toward Lynds 1251 are discussed. Estimate of stellar masses, and far-infrared lumnosities of the young stars associated with two prominent IRAS point sources imply that these are T-Tauri stars with masses smaller than <TEX>$0.3 M_\bigodot$</TEX>. The low dust temperature of 27 K and low ratio of FIR emission to hydrogen column density are probably due to the lack of internal heating sources. Presumably two low mass young stars do not have enough energy to heat up the dust and gas associated. The dust heating is dominated by the interstellar heating source, and the weaker interstellar radiation field can explain the exceptionally low dust temperatures found in Lynds 1251. The estimated dust mass of Lynds 1251 is just <TEX>$\~1M_\bigodot$</TEX>, or about 1/1000 of gas mass, which implies that there must be a substantial amount of colder dust. The infrared flux at <TEX>$100{\mu}m$</TEX> is matching well with <TEX>$^{13}CO$</TEX> peak temperature, while the <TEX>$^{12}CO$</TEX> integrated intensity is matching with the boundary of dust emission. Overall, the dust properties of Lynds 1251 is similar to those of normal dark clouds even though it does have star forming activities.
867
- OHTANI H.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.405-406
- 1996
- 원문 바로보기
868
- KURTANIDZE OMAR M.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.61-62
- 1996
- 원문 바로보기
The photometry is reported for galaxies in two clusters A1983, 2065 with redshifts 0.046, 0.072 respectively. The luminosity segregation is observed only within a magnitude from the brightest galaxy. The alignment of the galaxy major axis is observed in the Corona Borealis cluster. The intermediate distance clusters (0.05 < z < 0.15) will be studied by CCD mounted on 125cm RCh and 70cm meniscus type telescopes.
869
- 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.
870
- TOVMASSIAN H. M.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.149-150
- 1996
- 원문 바로보기
The results of observations of a dozen OB stellar associations made with the ultraviolet space telescope Glazar is presented.