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The basic state of a disk galaxy with finite thickness 厚度有限的盘状星系的基本状态
Chinese Astronomy Pub Date : 1980-09-01 DOI: 10.1016/0146-6364(80)90005-5
Xu Jian-jun
{"title":"The basic state of a disk galaxy with finite thickness","authors":"Xu Jian-jun","doi":"10.1016/0146-6364(80)90005-5","DOIUrl":"10.1016/0146-6364(80)90005-5","url":null,"abstract":"<div><p>This paper deals with the steady basic state of a disc galaxy with finite thickness. A hydrodynamical model is used and the zeroth and first order solutions in the small parameter thicknes/(overall radius) are obtained.</p></div>","PeriodicalId":100241,"journal":{"name":"Chinese Astronomy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1980-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-6364(80)90005-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87055905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A possible mechanism of nonresonant heating of the chromosphere-corona transition zone 色球-日冕过渡带非共振加热的可能机制
Chinese Astronomy Pub Date : 1980-09-01 DOI: 10.1016/0146-6364(80)90010-9
Li Xiao-qing, Zhang Zhen-da
{"title":"A possible mechanism of nonresonant heating of the chromosphere-corona transition zone","authors":"Li Xiao-qing,&nbsp;Zhang Zhen-da","doi":"10.1016/0146-6364(80)90010-9","DOIUrl":"10.1016/0146-6364(80)90010-9","url":null,"abstract":"<div><p>The steep temperature distribution with height in the solar chromosphere-corona transition zone is one of the unsolved problems in solar physics. This paper presents a qualitative and quantitative explanation to this steep distribution of temperature in terms of the pileup effect of the oscillations in a plasma and the mechanism of wave-particles nonresonant heating. Analysis shows that if a proton beam of high energy is continuously injected into the transition zone from the chromosphere, the steep distribution of temperature is able to appear in a narrow layer through the plasma wave-particles nonlinear interactions.</p></div>","PeriodicalId":100241,"journal":{"name":"Chinese Astronomy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1980-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-6364(80)90010-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88193135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Spectrophotometry of Nova Cygni 1975 (V1500 Cygni) Cygni新星1975 (V1500 Cygni)分光光度法
Chinese Astronomy Pub Date : 1980-09-01 DOI: 10.1016/0146-6364(80)90007-9
Liu Zong-li, Mei Bao, Li You-gang
{"title":"Spectrophotometry of Nova Cygni 1975 (V1500 Cygni)","authors":"Liu Zong-li,&nbsp;Mei Bao,&nbsp;Li You-gang","doi":"10.1016/0146-6364(80)90007-9","DOIUrl":"10.1016/0146-6364(80)90007-9","url":null,"abstract":"<div><p>The spectrum of Nova Cygni 1975 obtained at the Beijing Observatory is further analysed here. The distance, interstellar absorption, intensity ratios of some emission lines of the nova, the temperature of the central star and the electron density and temperature in the expanding shell are derived. As the nova declined in brightness, both the temperature of the central star and the electron temperature increased and they showed similar fluctuations.</p></div>","PeriodicalId":100241,"journal":{"name":"Chinese Astronomy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1980-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-6364(80)90007-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75228384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Comparison of the responses of the atmosphere of Earth, Venus, Mars and Jupiter to heat sources and perturbations 地球、金星、火星和木星大气对热源和扰动的响应比较
Chinese Astronomy Pub Date : 1980-09-01 DOI: 10.1016/0146-6364(80)90015-8
Chen Zhe-ming
{"title":"Comparison of the responses of the atmosphere of Earth, Venus, Mars and Jupiter to heat sources and perturbations","authors":"Chen Zhe-ming","doi":"10.1016/0146-6364(80)90015-8","DOIUrl":"10.1016/0146-6364(80)90015-8","url":null,"abstract":"<div><p>The different characteristics of the structure and dynamics of the terrestial, the cytherean, the martian and the jovian atmospheres have been analysed. Our analyses with one-dimensional and three-dimensional models show the thermal structure of the martian and jovian atmosphere to be similar to that of the terrestrial atmosphere. For these three atmospheres the dimensionless parameter of thermal structure α is of the order 1, which is in contrast to the small <em>α</em> (5 × 10<sup>−2</sup>) for the cytherean atmosphere.</p></div>","PeriodicalId":100241,"journal":{"name":"Chinese Astronomy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1980-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-6364(80)90015-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76288272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
V879 Sco is a long-period variable V879 Sco是一个长周期变量
Chinese Astronomy Pub Date : 1980-09-01 DOI: 10.1016/0146-6364(80)90018-3
Yao Bao-an, Huang Chang-chun, Yin Ji-sheng, Sun Yi-li, Wang Lao-cheng
{"title":"V879 Sco is a long-period variable","authors":"Yao Bao-an,&nbsp;Huang Chang-chun,&nbsp;Yin Ji-sheng,&nbsp;Sun Yi-li,&nbsp;Wang Lao-cheng","doi":"10.1016/0146-6364(80)90018-3","DOIUrl":"10.1016/0146-6364(80)90018-3","url":null,"abstract":"","PeriodicalId":100241,"journal":{"name":"Chinese Astronomy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1980-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-6364(80)90018-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73096385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
On magnetic field gradients in sunspots 太阳黑子的磁场梯度
Chinese Astronomy Pub Date : 1980-09-01 DOI: 10.1016/0146-6364(80)90009-2
Ye Shi-hui, Wang Zhen-yi, Jin Jie-hai
{"title":"On magnetic field gradients in sunspots","authors":"Ye Shi-hui,&nbsp;Wang Zhen-yi,&nbsp;Jin Jie-hai","doi":"10.1016/0146-6364(80)90009-2","DOIUrl":"10.1016/0146-6364(80)90009-2","url":null,"abstract":"<div><p>This paper is devoted mainly to a method of determining the gradient of magnetic fields. Utilizing the numerical solution of the equations of transfer of the Stokes parameters, we have calculated quantities characterizing the asymmetry and the amount of rotation of the wings of the “o” and “e” profiles of the magnetically sensitive line Fe Iλ 6302.499 as functions of the magnetic field gradient. The results of calculations have been verified with our own spectrophotometric observations of a large sunspot. The range of validity of the method is discussed, and the possible influence of the presence of magnetic field gradients on the observational data of magnetographs is investigated.</p></div>","PeriodicalId":100241,"journal":{"name":"Chinese Astronomy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1980-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-6364(80)90009-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87571417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Frozen-in and resistive force-free fields in moving fluids 流动流体中的冻结场和无阻力场
Chinese Astronomy Pub Date : 1980-06-01 DOI: 10.1016/0146-6364(80)90049-3
Pan Liang-ru
{"title":"Frozen-in and resistive force-free fields in moving fluids","authors":"Pan Liang-ru","doi":"10.1016/0146-6364(80)90049-3","DOIUrl":"10.1016/0146-6364(80)90049-3","url":null,"abstract":"<div><p>Conclusion in [1] have been further verified. New results are: (1) If the electric potential ▿<em>φ</em> obeys the gauge relation <span><span><span><math><mtext>∂</mtext><mtext>A</mtext><mtext>∂t</mtext><mtext>·</mtext><mtext>B</mtext><mtext>=0</mtext></math></span></span></span> then the necessary and sufficient condition for α to be constant is <span><span><span><math><mtext>▿×(</mtext><mtext>V</mtext><mtext>×</mtext><mtext>B</mtext><mtext>)=β</mtext><mtext>B</mtext><mtext>, </mtext><mtext>∂</mtext><mtext>A</mtext><mtext>̀</mtext><mtext>∂t</mtext><mtext>=0</mtext></math></span></span></span>. (2) An equation governing the behaviour of α has been derived, which shows that the electrical resistance is the agency that causes a non-constant α to evolve into a constant one.</p></div>","PeriodicalId":100241,"journal":{"name":"Chinese Astronomy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1980-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-6364(80)90049-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89166475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Revision of the FK4 catalogue from type-1 photoelectric astrolabe observations in the period 1973 October – 1976 October 1973年10月- 1976年10月1型光电星盘观测资料对FK4星表的修订
Chinese Astronomy Pub Date : 1980-06-01 DOI: 10.1016/0146-6364(80)90044-4
Yang Ting-Gao
{"title":"Revision of the FK4 catalogue from type-1 photoelectric astrolabe observations in the period 1973 October – 1976 October","authors":"Yang Ting-Gao","doi":"10.1016/0146-6364(80)90044-4","DOIUrl":"10.1016/0146-6364(80)90044-4","url":null,"abstract":"<div><p>We give the revisions to the FK4 Catalogue based on the observations made with a Type-1 photoelectric astrilabe in the period 1973 October to 1976 October, together with a description of the procedures and the accuracies obtained, and a study of the systematic errors of Δα<sub>δ</sub> and Δδ<sub>δ</sub> types in the catalogue. The results obtained show that the Type-1 photoelectric astrolabe is better than the Danjon astrolabe for the purpose of improving star positions.</p></div>","PeriodicalId":100241,"journal":{"name":"Chinese Astronomy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1980-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-6364(80)90044-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90653483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The astrodome servo system of the 60-cm telescope of the Peking observatory 北京天文台60厘米望远镜的天球伺服系统
Chinese Astronomy Pub Date : 1980-06-01 DOI: 10.1016/0146-6364(80)90053-5
Shen Pan-an
{"title":"The astrodome servo system of the 60-cm telescope of the Peking observatory","authors":"Shen Pan-an","doi":"10.1016/0146-6364(80)90053-5","DOIUrl":"10.1016/0146-6364(80)90053-5","url":null,"abstract":"<div><p>A tracking system has been installed on the dome of the 60-cm telescope of the Peking observatory. The system uses rotating transformers to transform the coordinates, a relay-operated servo system, with a squirrel-cage induction motor as the executing component. The control system is a non-linear system. In addition to D.C. motor braking, position and velocity feedbacks are used to eliminate self-excited oscillations. The systematic error of the system does not exceed ±1°. The system costs less and is more reliable than a D.C. motor system.</p></div>","PeriodicalId":100241,"journal":{"name":"Chinese Astronomy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1980-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-6364(80)90053-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73955759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of atmospheric irregularities on radio interferometer measurements 大气不规则性对无线电干涉仪测量的影响
Chinese Astronomy Pub Date : 1980-06-01 DOI: 10.1016/0146-6364(80)90048-1
Han Wen-jun
{"title":"Effects of atmospheric irregularities on radio interferometer measurements","authors":"Han Wen-jun","doi":"10.1016/0146-6364(80)90048-1","DOIUrl":"10.1016/0146-6364(80)90048-1","url":null,"abstract":"<div><p>Under the first-order Born approximation of scattered field, we have derived the expressions (17), (26) and (30) for the phase fluctuations caused by small scale irregularities in the atmosphere together with a discussion of the effects of irregularities of different sizes on radio interferometer measurements.</p></div>","PeriodicalId":100241,"journal":{"name":"Chinese Astronomy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1980-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-6364(80)90048-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86184624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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